<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2023 Workiva-->
<!--r:778bf734-89d5-4efb-9a3a-626e63c6eb88,g:9ea095fe-98eb-4b42-8f3e-a8989dce9b51-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
  <link:roleRef roleURI="http://www.amkor.com/role/ConsolidatedStatementsofStockholdersEquity" xlink:type="simple" xlink:href="amkr-20221231.xsd#ConsolidatedStatementsofStockholdersEquity"/>
  <link:definitionLink xlink:role="http://www.amkor.com/role/ConsolidatedStatementsofStockholdersEquity" xlink:type="extended" id="i74c06c13a7604a27be47754f8a2f2342_ConsolidatedStatementsofStockholdersEquity">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_59a3501e-951e-42a7-a8ec-98270caafeb1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_14b31aa7-108c-40c3-8885-7ff9ebeeed8c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_59a3501e-951e-42a7-a8ec-98270caafeb1" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_14b31aa7-108c-40c3-8885-7ff9ebeeed8c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesIssued_0fa0b540-1c2e-48d3-923b-97efca76a426" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonStockSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_14b31aa7-108c-40c3-8885-7ff9ebeeed8c" xlink:to="loc_us-gaap_CommonStockSharesIssued_0fa0b540-1c2e-48d3-923b-97efca76a426" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_0d307473-f713-46fa-accb-7fe4e96ddcca" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_14b31aa7-108c-40c3-8885-7ff9ebeeed8c" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_0d307473-f713-46fa-accb-7fe4e96ddcca" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonShares_e9a25300-5e8d-4644-ab0c-d057fba176a9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TreasuryStockCommonShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_14b31aa7-108c-40c3-8885-7ff9ebeeed8c" xlink:to="loc_us-gaap_TreasuryStockCommonShares_e9a25300-5e8d-4644-ab0c-d057fba176a9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_d188c5c4-1227-4bdc-b482-4f16a06d81b9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_14b31aa7-108c-40c3-8885-7ff9ebeeed8c" xlink:to="loc_us-gaap_ProfitLoss_d188c5c4-1227-4bdc-b482-4f16a06d81b9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_78e04653-74cf-4540-a055-10e02064e7e7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_14b31aa7-108c-40c3-8885-7ff9ebeeed8c" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_78e04653-74cf-4540-a055-10e02064e7e7" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_4ef5672a-5252-43bb-9a17-4991c4c8f605" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_14b31aa7-108c-40c3-8885-7ff9ebeeed8c" xlink:to="loc_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_4ef5672a-5252-43bb-9a17-4991c4c8f605" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_09c39961-d53a-4e5b-b201-fada8870dbf8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_14b31aa7-108c-40c3-8885-7ff9ebeeed8c" xlink:to="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_09c39961-d53a-4e5b-b201-fada8870dbf8" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_22647062-1e03-4693-952c-1f54fb640cea" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_14b31aa7-108c-40c3-8885-7ff9ebeeed8c" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_22647062-1e03-4693-952c-1f54fb640cea" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_67510ae9-6b33-4a5f-a3df-0c53c8189cc6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_14b31aa7-108c-40c3-8885-7ff9ebeeed8c" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_67510ae9-6b33-4a5f-a3df-0c53c8189cc6" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_c1538ac0-1d4e-4414-9b58-624782c37633" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_14b31aa7-108c-40c3-8885-7ff9ebeeed8c" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_c1538ac0-1d4e-4414-9b58-624782c37633" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCash_d7fbe43c-04a9-4ff1-907d-721594a236e6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DividendsCash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_14b31aa7-108c-40c3-8885-7ff9ebeeed8c" xlink:to="loc_us-gaap_DividendsCash_d7fbe43c-04a9-4ff1-907d-721594a236e6" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_a658a942-4e99-4174-8734-cb4d12607869" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_14b31aa7-108c-40c3-8885-7ff9ebeeed8c" xlink:to="loc_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_a658a942-4e99-4174-8734-cb4d12607869" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesIssued_2076552b-64be-4e68-9cf4-95b80b38e312" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonStockSharesIssued"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_1c1eded6-e46e-4bec-b39a-39fe0402c171" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonShares_708fe2ef-4e33-4a2b-b0b9-e49a63a67f96" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TreasuryStockCommonShares"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_f8964665-4635-4457-99f9-f341c8179304" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_59a3501e-951e-42a7-a8ec-98270caafeb1" xlink:to="loc_us-gaap_StatementTable_f8964665-4635-4457-99f9-f341c8179304" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_3b9ed0e1-2c64-4895-99b7-58232412723c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_f8964665-4635-4457-99f9-f341c8179304" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_3b9ed0e1-2c64-4895-99b7-58232412723c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_3b9ed0e1-2c64-4895-99b7-58232412723c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_3b9ed0e1-2c64-4895-99b7-58232412723c" xlink:to="loc_us-gaap_EquityComponentDomain_3b9ed0e1-2c64-4895-99b7-58232412723c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_3fd55efb-9a54-471e-b849-672e9645fbe6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_3b9ed0e1-2c64-4895-99b7-58232412723c" xlink:to="loc_us-gaap_EquityComponentDomain_3fd55efb-9a54-471e-b849-672e9645fbe6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ParentMember_1706a950-90b3-4f2f-b285-a47d49c7f873" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ParentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_3fd55efb-9a54-471e-b849-672e9645fbe6" xlink:to="loc_us-gaap_ParentMember_1706a950-90b3-4f2f-b285-a47d49c7f873" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_e768a6a7-95e3-4427-9818-7d527517df83" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_1706a950-90b3-4f2f-b285-a47d49c7f873" xlink:to="loc_us-gaap_CommonStockMember_e768a6a7-95e3-4427-9818-7d527517df83" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_202ed0e2-6155-45c9-8bca-7bf4c00634e9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_1706a950-90b3-4f2f-b285-a47d49c7f873" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_202ed0e2-6155-45c9-8bca-7bf4c00634e9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_499db23e-58fb-4f3c-8503-9576c7d821c2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_1706a950-90b3-4f2f-b285-a47d49c7f873" xlink:to="loc_us-gaap_RetainedEarningsMember_499db23e-58fb-4f3c-8503-9576c7d821c2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_b57abba0-2066-4623-a939-145344e1db78" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_1706a950-90b3-4f2f-b285-a47d49c7f873" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_b57abba0-2066-4623-a939-145344e1db78" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonMember_d012885c-48ce-4b62-993d-7fda0422bf04" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TreasuryStockCommonMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_1706a950-90b3-4f2f-b285-a47d49c7f873" xlink:to="loc_us-gaap_TreasuryStockCommonMember_d012885c-48ce-4b62-993d-7fda0422bf04" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncontrollingInterestMember_802c8e47-93e4-43bb-b509-9b6f9b08006d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NoncontrollingInterestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_3fd55efb-9a54-471e-b849-672e9645fbe6" xlink:to="loc_us-gaap_NoncontrollingInterestMember_802c8e47-93e4-43bb-b509-9b6f9b08006d" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.amkor.com/role/DescriptionofBusinessandSummaryofSignificantAccountingPoliciesNarrativeDetails" xlink:type="simple" xlink:href="amkr-20221231.xsd#DescriptionofBusinessandSummaryofSignificantAccountingPoliciesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.amkor.com/role/DescriptionofBusinessandSummaryofSignificantAccountingPoliciesNarrativeDetails" xlink:type="extended" id="ibf23de9eb1444deaa8f2b7f884105bdb_DescriptionofBusinessandSummaryofSignificantAccountingPoliciesNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_amkr_ScheduleOfSignificantAccountingPoliciesLineItems_307d8bae-a71a-4d7a-b15e-241962d9ee91" xlink:href="amkr-20221231.xsd#amkr_ScheduleOfSignificantAccountingPoliciesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityOwnershipPercentage_54ab248c-e6bb-4702-9b88-1eee2d8e1d95" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_VariableInterestEntityOwnershipPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_amkr_ScheduleOfSignificantAccountingPoliciesLineItems_307d8bae-a71a-4d7a-b15e-241962d9ee91" xlink:to="loc_us-gaap_VariableInterestEntityOwnershipPercentage_54ab248c-e6bb-4702-9b88-1eee2d8e1d95" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_16b2916c-00f2-4f6a-92d9-1021768c7dce" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_amkr_ScheduleOfSignificantAccountingPoliciesLineItems_307d8bae-a71a-4d7a-b15e-241962d9ee91" xlink:to="loc_us-gaap_Assets_16b2916c-00f2-4f6a-92d9-1021768c7dce" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_e4567b51-47e9-422b-93c3-69e7e76c62e6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Liabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_amkr_ScheduleOfSignificantAccountingPoliciesLineItems_307d8bae-a71a-4d7a-b15e-241962d9ee91" xlink:to="loc_us-gaap_Liabilities_e4567b51-47e9-422b-93c3-69e7e76c62e6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_b429e5f9-0b3e-42a0-9495-e644e7593f22" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConcentrationRiskPercentage1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_amkr_ScheduleOfSignificantAccountingPoliciesLineItems_307d8bae-a71a-4d7a-b15e-241962d9ee91" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_b429e5f9-0b3e-42a0-9495-e644e7593f22" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_LeaseRemainingLeaseTerm_cfa6dfbf-90d1-4d6e-bbad-00235e34f75f" xlink:href="amkr-20221231.xsd#amkr_LeaseRemainingLeaseTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_amkr_ScheduleOfSignificantAccountingPoliciesLineItems_307d8bae-a71a-4d7a-b15e-241962d9ee91" xlink:to="loc_amkr_LeaseRemainingLeaseTerm_cfa6dfbf-90d1-4d6e-bbad-00235e34f75f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnbilledReceivablesCurrent_3418d9bb-dca3-45f9-9706-18370dfcf54f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_UnbilledReceivablesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_amkr_ScheduleOfSignificantAccountingPoliciesLineItems_307d8bae-a71a-4d7a-b15e-241962d9ee91" xlink:to="loc_us-gaap_UnbilledReceivablesCurrent_3418d9bb-dca3-45f9-9706-18370dfcf54f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiability_278bb70e-3d4f-48a2-8e5b-4f2954034c21" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ContractWithCustomerLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_amkr_ScheduleOfSignificantAccountingPoliciesLineItems_307d8bae-a71a-4d7a-b15e-241962d9ee91" xlink:to="loc_us-gaap_ContractWithCustomerLiability_278bb70e-3d4f-48a2-8e5b-4f2954034c21" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityCurrent_10056644-0049-41bf-a875-c92fa91496fa" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ContractWithCustomerLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_amkr_ScheduleOfSignificantAccountingPoliciesLineItems_307d8bae-a71a-4d7a-b15e-241962d9ee91" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityCurrent_10056644-0049-41bf-a875-c92fa91496fa" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_9d137e46-ced6-4a33-948c-5e32517a0425" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_amkr_ScheduleOfSignificantAccountingPoliciesLineItems_307d8bae-a71a-4d7a-b15e-241962d9ee91" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_9d137e46-ced6-4a33-948c-5e32517a0425" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_3d28312f-4734-487e-8da6-94ef75c9a7cb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ContractWithCustomerLiabilityRevenueRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_amkr_ScheduleOfSignificantAccountingPoliciesLineItems_307d8bae-a71a-4d7a-b15e-241962d9ee91" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_3d28312f-4734-487e-8da6-94ef75c9a7cb" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeGainLossStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration_53b27384-f081-4e95-ba84-7420181aa73d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DerivativeGainLossStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_amkr_ScheduleOfSignificantAccountingPoliciesLineItems_307d8bae-a71a-4d7a-b15e-241962d9ee91" xlink:to="loc_us-gaap_DerivativeGainLossStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration_53b27384-f081-4e95-ba84-7420181aa73d" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_ScheduleOfSignificantAccountingPoliciesTable_056923d1-b559-4003-aa1a-728fa65669da" xlink:href="amkr-20221231.xsd#amkr_ScheduleOfSignificantAccountingPoliciesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_amkr_ScheduleOfSignificantAccountingPoliciesLineItems_307d8bae-a71a-4d7a-b15e-241962d9ee91" xlink:to="loc_amkr_ScheduleOfSignificantAccountingPoliciesTable_056923d1-b559-4003-aa1a-728fa65669da" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_202d8486-b3fc-413e-8a38-bcd2de6f21d2" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_amkr_ScheduleOfSignificantAccountingPoliciesTable_056923d1-b559-4003-aa1a-728fa65669da" xlink:to="loc_srt_ConsolidatedEntitiesAxis_202d8486-b3fc-413e-8a38-bcd2de6f21d2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_202d8486-b3fc-413e-8a38-bcd2de6f21d2_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_202d8486-b3fc-413e-8a38-bcd2de6f21d2" xlink:to="loc_srt_ConsolidatedEntitiesDomain_202d8486-b3fc-413e-8a38-bcd2de6f21d2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_0cee82c5-8dac-4882-810b-53c297d79f89" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_202d8486-b3fc-413e-8a38-bcd2de6f21d2" xlink:to="loc_srt_ConsolidatedEntitiesDomain_0cee82c5-8dac-4882-810b-53c297d79f89" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_cdb58ce8-ff37-4be2-a068-1384fbe9ecad" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_VariableInterestEntityPrimaryBeneficiaryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_0cee82c5-8dac-4882-810b-53c297d79f89" xlink:to="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_cdb58ce8-ff37-4be2-a068-1384fbe9ecad" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MajorCustomersAxis_0269ed9b-830f-44ea-8a46-9e3c9fc47c46" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MajorCustomersAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_amkr_ScheduleOfSignificantAccountingPoliciesTable_056923d1-b559-4003-aa1a-728fa65669da" xlink:to="loc_srt_MajorCustomersAxis_0269ed9b-830f-44ea-8a46-9e3c9fc47c46" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_0269ed9b-830f-44ea-8a46-9e3c9fc47c46_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_MajorCustomersAxis_0269ed9b-830f-44ea-8a46-9e3c9fc47c46" xlink:to="loc_srt_NameOfMajorCustomerDomain_0269ed9b-830f-44ea-8a46-9e3c9fc47c46_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_fdd998d1-106d-4bb5-a105-78a3269680ea" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_MajorCustomersAxis_0269ed9b-830f-44ea-8a46-9e3c9fc47c46" xlink:to="loc_srt_NameOfMajorCustomerDomain_fdd998d1-106d-4bb5-a105-78a3269680ea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_LargestCustomerMember_6768c899-91ea-4188-b0d5-cc9b0d5fcd82" xlink:href="amkr-20221231.xsd#amkr_LargestCustomerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_fdd998d1-106d-4bb5-a105-78a3269680ea" xlink:to="loc_amkr_LargestCustomerMember_6768c899-91ea-4188-b0d5-cc9b0d5fcd82" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_SecondLargestCustomerMember_7d415364-5295-4a81-8eb0-712484a7e436" xlink:href="amkr-20221231.xsd#amkr_SecondLargestCustomerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_fdd998d1-106d-4bb5-a105-78a3269680ea" xlink:to="loc_amkr_SecondLargestCustomerMember_7d415364-5295-4a81-8eb0-712484a7e436" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_edd49be1-e6a7-41f5-8931-9740a73306d3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_amkr_ScheduleOfSignificantAccountingPoliciesTable_056923d1-b559-4003-aa1a-728fa65669da" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_edd49be1-e6a7-41f5-8931-9740a73306d3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_edd49be1-e6a7-41f5-8931-9740a73306d3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_edd49be1-e6a7-41f5-8931-9740a73306d3" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_edd49be1-e6a7-41f5-8931-9740a73306d3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_7aeb7c5d-b109-4ffb-bdbe-61f83c71d069" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_edd49be1-e6a7-41f5-8931-9740a73306d3" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_7aeb7c5d-b109-4ffb-bdbe-61f83c71d069" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesMember_a427a20e-9dae-4911-b9d4-1ef3f7dcba39" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_7aeb7c5d-b109-4ffb-bdbe-61f83c71d069" xlink:to="loc_us-gaap_SalesMember_a427a20e-9dae-4911-b9d4-1ef3f7dcba39" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_7b4f8e9b-7631-4ae2-b911-594df1d641e6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConcentrationRiskByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_amkr_ScheduleOfSignificantAccountingPoliciesTable_056923d1-b559-4003-aa1a-728fa65669da" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_7b4f8e9b-7631-4ae2-b911-594df1d641e6" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_7b4f8e9b-7631-4ae2-b911-594df1d641e6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_7b4f8e9b-7631-4ae2-b911-594df1d641e6" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_7b4f8e9b-7631-4ae2-b911-594df1d641e6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_9005bf4b-c0f6-4444-9007-c8a74d6b949b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_7b4f8e9b-7631-4ae2-b911-594df1d641e6" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_9005bf4b-c0f6-4444-9007-c8a74d6b949b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerConcentrationRiskMember_da4d846f-9bea-4560-b667-762b8209aeb0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CustomerConcentrationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_9005bf4b-c0f6-4444-9007-c8a74d6b949b" xlink:to="loc_us-gaap_CustomerConcentrationRiskMember_da4d846f-9bea-4560-b667-762b8209aeb0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_02010b21-e6a3-481f-939f-11180316f84f" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_amkr_ScheduleOfSignificantAccountingPoliciesTable_056923d1-b559-4003-aa1a-728fa65669da" xlink:to="loc_srt_RangeAxis_02010b21-e6a3-481f-939f-11180316f84f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_02010b21-e6a3-481f-939f-11180316f84f_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_02010b21-e6a3-481f-939f-11180316f84f" xlink:to="loc_srt_RangeMember_02010b21-e6a3-481f-939f-11180316f84f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_29687eaf-486a-400b-a54c-a800ecc5f1f8" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_02010b21-e6a3-481f-939f-11180316f84f" xlink:to="loc_srt_RangeMember_29687eaf-486a-400b-a54c-a800ecc5f1f8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_e01a686f-2258-4a96-9d7a-55bd2364f49a" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_29687eaf-486a-400b-a54c-a800ecc5f1f8" xlink:to="loc_srt_MinimumMember_e01a686f-2258-4a96-9d7a-55bd2364f49a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_77394af3-8010-458b-812e-b8a213a781a5" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_29687eaf-486a-400b-a54c-a800ecc5f1f8" xlink:to="loc_srt_MaximumMember_77394af3-8010-458b-812e-b8a213a781a5" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.amkor.com/role/DescriptionofBusinessandSummaryofSignificantAccountingPoliciesSummaryofPropertyPlantandEquipmentDetails" xlink:type="simple" xlink:href="amkr-20221231.xsd#DescriptionofBusinessandSummaryofSignificantAccountingPoliciesSummaryofPropertyPlantandEquipmentDetails"/>
  <link:definitionLink xlink:role="http://www.amkor.com/role/DescriptionofBusinessandSummaryofSignificantAccountingPoliciesSummaryofPropertyPlantandEquipmentDetails" xlink:type="extended" id="i5812b4e244b54f27a12b7fc54fe65844_DescriptionofBusinessandSummaryofSignificantAccountingPoliciesSummaryofPropertyPlantandEquipmentDetails">
    <link:loc xlink:type="locator" xlink:label="loc_amkr_SummaryOfSignificantAccountingPoliciesLineItems_1077308d-5c7f-48fa-b185-899d9c707f22" xlink:href="amkr-20221231.xsd#amkr_SummaryOfSignificantAccountingPoliciesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_6f8aa135-629c-4a61-bc7a-5d58e936495b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_amkr_SummaryOfSignificantAccountingPoliciesLineItems_1077308d-5c7f-48fa-b185-899d9c707f22" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_6f8aa135-629c-4a61-bc7a-5d58e936495b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_ScheduleOfSignificantAccountingPoliciesTable_ce9cd80b-4acf-442b-8b9a-02989cf0cde1" xlink:href="amkr-20221231.xsd#amkr_ScheduleOfSignificantAccountingPoliciesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_amkr_SummaryOfSignificantAccountingPoliciesLineItems_1077308d-5c7f-48fa-b185-899d9c707f22" xlink:to="loc_amkr_ScheduleOfSignificantAccountingPoliciesTable_ce9cd80b-4acf-442b-8b9a-02989cf0cde1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_be5c31ee-33d0-44bc-8c82-0b48e67a255c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_amkr_ScheduleOfSignificantAccountingPoliciesTable_ce9cd80b-4acf-442b-8b9a-02989cf0cde1" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_be5c31ee-33d0-44bc-8c82-0b48e67a255c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_be5c31ee-33d0-44bc-8c82-0b48e67a255c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_be5c31ee-33d0-44bc-8c82-0b48e67a255c" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_be5c31ee-33d0-44bc-8c82-0b48e67a255c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_aaf67e8a-bbd9-427f-92b3-2a34bed9a390" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_be5c31ee-33d0-44bc-8c82-0b48e67a255c" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_aaf67e8a-bbd9-427f-92b3-2a34bed9a390" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BuildingAndBuildingImprovementsMember_e1eca72b-9229-49e4-9f31-f9cf3e5cbb29" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BuildingAndBuildingImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_aaf67e8a-bbd9-427f-92b3-2a34bed9a390" xlink:to="loc_us-gaap_BuildingAndBuildingImprovementsMember_e1eca72b-9229-49e4-9f31-f9cf3e5cbb29" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MachineryAndEquipmentMember_f97ec0fb-06c3-4a09-91f8-ef320736dad0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MachineryAndEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_aaf67e8a-bbd9-427f-92b3-2a34bed9a390" xlink:to="loc_us-gaap_MachineryAndEquipmentMember_f97ec0fb-06c3-4a09-91f8-ef320736dad0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_SoftwareAndComputerEquipmentMember_035d7851-e17f-4df3-a7d0-fb650b9108e4" xlink:href="amkr-20221231.xsd#amkr_SoftwareAndComputerEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_aaf67e8a-bbd9-427f-92b3-2a34bed9a390" xlink:to="loc_amkr_SoftwareAndComputerEquipmentMember_035d7851-e17f-4df3-a7d0-fb650b9108e4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FurnitureAndFixturesMember_1808c387-db5f-4fbb-8ed6-bfc2e46e3372" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FurnitureAndFixturesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_aaf67e8a-bbd9-427f-92b3-2a34bed9a390" xlink:to="loc_us-gaap_FurnitureAndFixturesMember_1808c387-db5f-4fbb-8ed6-bfc2e46e3372" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_2b18ad24-9d9a-4112-bc54-3a2db43f4dc3" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_amkr_ScheduleOfSignificantAccountingPoliciesTable_ce9cd80b-4acf-442b-8b9a-02989cf0cde1" xlink:to="loc_srt_RangeAxis_2b18ad24-9d9a-4112-bc54-3a2db43f4dc3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_2b18ad24-9d9a-4112-bc54-3a2db43f4dc3_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_2b18ad24-9d9a-4112-bc54-3a2db43f4dc3" xlink:to="loc_srt_RangeMember_2b18ad24-9d9a-4112-bc54-3a2db43f4dc3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_a3b63447-f4b4-4777-906d-e4209b6b5aa9" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_2b18ad24-9d9a-4112-bc54-3a2db43f4dc3" xlink:to="loc_srt_RangeMember_a3b63447-f4b4-4777-906d-e4209b6b5aa9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_11ca5a23-dc12-4e38-824d-58fde324eb9f" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_a3b63447-f4b4-4777-906d-e4209b6b5aa9" xlink:to="loc_srt_MinimumMember_11ca5a23-dc12-4e38-824d-58fde324eb9f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_630e39a0-d16d-44f4-b2b0-596ee55753f5" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_a3b63447-f4b4-4777-906d-e4209b6b5aa9" xlink:to="loc_srt_MaximumMember_630e39a0-d16d-44f4-b2b0-596ee55753f5" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.amkor.com/role/ShareBasedCompensationPlansNarrativeDetails" xlink:type="simple" xlink:href="amkr-20221231.xsd#ShareBasedCompensationPlansNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.amkor.com/role/ShareBasedCompensationPlansNarrativeDetails" xlink:type="extended" id="ibefb658afeae46cf91b2040cb71e6811_ShareBasedCompensationPlansNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f8d18a4b-ae74-411e-aca1-3d4c706dda2d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_536f10b8-e88e-4cce-b1fa-1c49a8645dc2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f8d18a4b-ae74-411e-aca1-3d4c706dda2d" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_536f10b8-e88e-4cce-b1fa-1c49a8645dc2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense_09ea3921-1688-4f21-be21-31d2db305f14" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f8d18a4b-ae74-411e-aca1-3d4c706dda2d" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense_09ea3921-1688-4f21-be21-31d2db305f14" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_4f5f0f69-555a-4017-b33b-46e2d7c9b811" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f8d18a4b-ae74-411e-aca1-3d4c706dda2d" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_4f5f0f69-555a-4017-b33b-46e2d7c9b811" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_84ae9b10-5ab2-48ed-a7ff-26f537c5d14b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonStockCapitalSharesReservedForFutureIssuance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f8d18a4b-ae74-411e-aca1-3d4c706dda2d" xlink:to="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_84ae9b10-5ab2-48ed-a7ff-26f537c5d14b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_6631938f-3eee-4371-84f5-d3672cf6cf15" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f8d18a4b-ae74-411e-aca1-3d4c706dda2d" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_6631938f-3eee-4371-84f5-d3672cf6cf15" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_18b208ac-d204-47c5-9c79-dbe36c343f41" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f8d18a4b-ae74-411e-aca1-3d4c706dda2d" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_18b208ac-d204-47c5-9c79-dbe36c343f41" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_52c840a6-8a2c-4142-a20e-6de97ea72861" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f8d18a4b-ae74-411e-aca1-3d4c706dda2d" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_52c840a6-8a2c-4142-a20e-6de97ea72861" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_aa22f81a-421f-49dd-b2aa-87a95d2f8b58" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f8d18a4b-ae74-411e-aca1-3d4c706dda2d" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_aa22f81a-421f-49dd-b2aa-87a95d2f8b58" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_d6b55656-7928-4064-bf17-675ede9ade6c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f8d18a4b-ae74-411e-aca1-3d4c706dda2d" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_d6b55656-7928-4064-bf17-675ede9ade6c" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_897df31f-de9f-4111-b98d-1d18c72b743a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f8d18a4b-ae74-411e-aca1-3d4c706dda2d" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_897df31f-de9f-4111-b98d-1d18c72b743a" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_RestrictedSharesVestingPercentage_a24ffd81-f93d-435f-a9d5-5b4e736b7cc2" xlink:href="amkr-20221231.xsd#amkr_RestrictedSharesVestingPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f8d18a4b-ae74-411e-aca1-3d4c706dda2d" xlink:to="loc_amkr_RestrictedSharesVestingPercentage_a24ffd81-f93d-435f-a9d5-5b4e736b7cc2" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingInstallments_1fd46671-0359-4c64-be9c-4a2d249b406d" xlink:href="amkr-20221231.xsd#amkr_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingInstallments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f8d18a4b-ae74-411e-aca1-3d4c706dda2d" xlink:to="loc_amkr_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingInstallments_1fd46671-0359-4c64-be9c-4a2d249b406d" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPercentageOfTargetGrantAmount_e468f232-fb6c-4d28-85d6-78465db9f4de" xlink:href="amkr-20221231.xsd#amkr_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPercentageOfTargetGrantAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f8d18a4b-ae74-411e-aca1-3d4c706dda2d" xlink:to="loc_amkr_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPercentageOfTargetGrantAmount_e468f232-fb6c-4d28-85d6-78465db9f4de" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_279d2304-4689-4dad-97b6-580005386f3f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f8d18a4b-ae74-411e-aca1-3d4c706dda2d" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_279d2304-4689-4dad-97b6-580005386f3f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_4108eff3-6295-4368-9bbe-d8d9606f5268" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_279d2304-4689-4dad-97b6-580005386f3f" xlink:to="loc_us-gaap_PlanNameAxis_4108eff3-6295-4368-9bbe-d8d9606f5268" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_4108eff3-6295-4368-9bbe-d8d9606f5268_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_4108eff3-6295-4368-9bbe-d8d9606f5268" xlink:to="loc_us-gaap_PlanNameDomain_4108eff3-6295-4368-9bbe-d8d9606f5268_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_d80c91c2-0bc6-4801-b439-a29f86c24a18" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_4108eff3-6295-4368-9bbe-d8d9606f5268" xlink:to="loc_us-gaap_PlanNameDomain_d80c91c2-0bc6-4801-b439-a29f86c24a18" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_TwoThousandSevenEquityIncentivePlanMember_341a1d17-0849-48cd-a44e-d9d562dd1e45" xlink:href="amkr-20221231.xsd#amkr_TwoThousandSevenEquityIncentivePlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_d80c91c2-0bc6-4801-b439-a29f86c24a18" xlink:to="loc_amkr_TwoThousandSevenEquityIncentivePlanMember_341a1d17-0849-48cd-a44e-d9d562dd1e45" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_TwoThousandTwentyOneEquityIncentivePlanMemberMember_0a89a169-d8db-436a-9c48-1010c53c97f1" xlink:href="amkr-20221231.xsd#amkr_TwoThousandTwentyOneEquityIncentivePlanMemberMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_d80c91c2-0bc6-4801-b439-a29f86c24a18" xlink:to="loc_amkr_TwoThousandTwentyOneEquityIncentivePlanMemberMember_0a89a169-d8db-436a-9c48-1010c53c97f1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_d71a543e-6103-44ba-a745-f6e90d1d496d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_279d2304-4689-4dad-97b6-580005386f3f" xlink:to="loc_us-gaap_AwardTypeAxis_d71a543e-6103-44ba-a745-f6e90d1d496d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_d71a543e-6103-44ba-a745-f6e90d1d496d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_d71a543e-6103-44ba-a745-f6e90d1d496d" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_d71a543e-6103-44ba-a745-f6e90d1d496d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_756eca4c-0e41-46ae-beb2-367d548e8f33" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_d71a543e-6103-44ba-a745-f6e90d1d496d" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_756eca4c-0e41-46ae-beb2-367d548e8f33" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_08295b8e-e6ae-4d82-95f4-73a9693478d4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_756eca4c-0e41-46ae-beb2-367d548e8f33" xlink:to="loc_us-gaap_EmployeeStockOptionMember_08295b8e-e6ae-4d82-95f4-73a9693478d4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_34420445-d954-4b70-9900-eefd620fe5fc" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_756eca4c-0e41-46ae-beb2-367d548e8f33" xlink:to="loc_us-gaap_RestrictedStockMember_34420445-d954-4b70-9900-eefd620fe5fc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_76ef2b28-a07a-4a9c-8dc5-100cecc93749" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_756eca4c-0e41-46ae-beb2-367d548e8f33" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_76ef2b28-a07a-4a9c-8dc5-100cecc93749" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_TimeVestedRestrictedStockUnitsMember_80f7ae80-3049-488b-abd5-d79e67cbf11f" xlink:href="amkr-20221231.xsd#amkr_TimeVestedRestrictedStockUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedStockUnitsRSUMember_76ef2b28-a07a-4a9c-8dc5-100cecc93749" xlink:to="loc_amkr_TimeVestedRestrictedStockUnitsMember_80f7ae80-3049-488b-abd5-d79e67cbf11f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_PerformanceVestedRestrictedStockUnitsMember_77f2d93c-dd94-4b58-bf5c-abe963279057" xlink:href="amkr-20221231.xsd#amkr_PerformanceVestedRestrictedStockUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedStockUnitsRSUMember_76ef2b28-a07a-4a9c-8dc5-100cecc93749" xlink:to="loc_amkr_PerformanceVestedRestrictedStockUnitsMember_77f2d93c-dd94-4b58-bf5c-abe963279057" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_7d22c611-fdb7-4562-8404-9b313703b474" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_279d2304-4689-4dad-97b6-580005386f3f" xlink:to="loc_srt_RangeAxis_7d22c611-fdb7-4562-8404-9b313703b474" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_7d22c611-fdb7-4562-8404-9b313703b474_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_7d22c611-fdb7-4562-8404-9b313703b474" xlink:to="loc_srt_RangeMember_7d22c611-fdb7-4562-8404-9b313703b474_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_61b074d0-b482-4f18-836c-3616ae422459" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_7d22c611-fdb7-4562-8404-9b313703b474" xlink:to="loc_srt_RangeMember_61b074d0-b482-4f18-836c-3616ae422459" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_3fff67af-2044-442e-8553-6470b6cd4848" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_61b074d0-b482-4f18-836c-3616ae422459" xlink:to="loc_srt_MinimumMember_3fff67af-2044-442e-8553-6470b6cd4848" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_0b2795ce-141e-4823-a079-a64aead1b0fb" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_61b074d0-b482-4f18-836c-3616ae422459" xlink:to="loc_srt_MaximumMember_0b2795ce-141e-4823-a079-a64aead1b0fb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualAxis_9fb33964-b7d6-4882-a988-5115db1820b0" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_TitleOfIndividualAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_279d2304-4689-4dad-97b6-580005386f3f" xlink:to="loc_srt_TitleOfIndividualAxis_9fb33964-b7d6-4882-a988-5115db1820b0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_9fb33964-b7d6-4882-a988-5115db1820b0_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_TitleOfIndividualAxis_9fb33964-b7d6-4882-a988-5115db1820b0" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_9fb33964-b7d6-4882-a988-5115db1820b0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_c4bfb959-a654-4f56-af05-11405439477c" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_TitleOfIndividualAxis_9fb33964-b7d6-4882-a988-5115db1820b0" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_c4bfb959-a654-4f56-af05-11405439477c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_DirectorMember_56266cd6-08ed-4437-81a9-968254364eb5" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_DirectorMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_c4bfb959-a654-4f56-af05-11405439477c" xlink:to="loc_srt_DirectorMember_56266cd6-08ed-4437-81a9-968254364eb5" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.amkor.com/role/ShareBasedCompensationPlansRestrictedSharesandRestrictedStockUnitsActivityDetails" xlink:type="simple" xlink:href="amkr-20221231.xsd#ShareBasedCompensationPlansRestrictedSharesandRestrictedStockUnitsActivityDetails"/>
  <link:definitionLink xlink:role="http://www.amkor.com/role/ShareBasedCompensationPlansRestrictedSharesandRestrictedStockUnitsActivityDetails" xlink:type="extended" id="id6d2616566864167a3c4fdf0f8de0166_ShareBasedCompensationPlansRestrictedSharesandRestrictedStockUnitsActivityDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a01e82f9-c12b-4a5f-abab-d14b785a438c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_29233a7b-73fd-4163-a92c-c797a910e207" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a01e82f9-c12b-4a5f-abab-d14b785a438c" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_29233a7b-73fd-4163-a92c-c797a910e207" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_06d83d27-be3a-458e-b494-3e2c027d8c8d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_29233a7b-73fd-4163-a92c-c797a910e207" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_06d83d27-be3a-458e-b494-3e2c027d8c8d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_cb9438e1-b196-46a7-b051-d759bca38245" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_29233a7b-73fd-4163-a92c-c797a910e207" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_cb9438e1-b196-46a7-b051-d759bca38245" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_23c8140f-5277-4ac6-a45a-8bf1eb213bf7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_29233a7b-73fd-4163-a92c-c797a910e207" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_23c8140f-5277-4ac6-a45a-8bf1eb213bf7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_a1017309-17b6-4f15-a308-959f9d9ce78f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_29233a7b-73fd-4163-a92c-c797a910e207" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_a1017309-17b6-4f15-a308-959f9d9ce78f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_ef3d7f6a-1c33-4f30-979c-8f2e9322095b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_b027bce7-e1d4-45dd-a58a-661ff7b35745" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a01e82f9-c12b-4a5f-abab-d14b785a438c" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_b027bce7-e1d4-45dd-a58a-661ff7b35745" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_97260b62-7c85-4897-8a20-4af9928fa86b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_b027bce7-e1d4-45dd-a58a-661ff7b35745" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_97260b62-7c85-4897-8a20-4af9928fa86b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_b506f7f9-d054-4dba-aa24-db5a553b97b9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_b027bce7-e1d4-45dd-a58a-661ff7b35745" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_b506f7f9-d054-4dba-aa24-db5a553b97b9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_53ddbf49-97c0-4549-95d5-e8a37e65299f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_b027bce7-e1d4-45dd-a58a-661ff7b35745" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_53ddbf49-97c0-4549-95d5-e8a37e65299f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_0d039c35-dcd8-47ea-a2dc-2d8d8c95fc0b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_b027bce7-e1d4-45dd-a58a-661ff7b35745" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_0d039c35-dcd8-47ea-a2dc-2d8d8c95fc0b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_a791ddb3-e6e4-4b67-bfb3-0137d6392658" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_4d3ef28f-af49-4047-842f-1a92a49c2488" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a01e82f9-c12b-4a5f-abab-d14b785a438c" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_4d3ef28f-af49-4047-842f-1a92a49c2488" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_7e1d45c3-27d1-4539-b543-0fb9221f0af1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_4d3ef28f-af49-4047-842f-1a92a49c2488" xlink:to="loc_us-gaap_AwardTypeAxis_7e1d45c3-27d1-4539-b543-0fb9221f0af1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_7e1d45c3-27d1-4539-b543-0fb9221f0af1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_7e1d45c3-27d1-4539-b543-0fb9221f0af1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_7e1d45c3-27d1-4539-b543-0fb9221f0af1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8ca3c2cb-4a8a-49ec-a9ad-d2c781e152df" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_7e1d45c3-27d1-4539-b543-0fb9221f0af1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8ca3c2cb-4a8a-49ec-a9ad-d2c781e152df" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_3a7e44b9-5eb7-437d-9f6c-fa6fbe97acb2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8ca3c2cb-4a8a-49ec-a9ad-d2c781e152df" xlink:to="loc_us-gaap_RestrictedStockMember_3a7e44b9-5eb7-437d-9f6c-fa6fbe97acb2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_e94c0f29-7af3-4d20-85c7-48caeb644dc8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8ca3c2cb-4a8a-49ec-a9ad-d2c781e152df" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_e94c0f29-7af3-4d20-85c7-48caeb644dc8" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.amkor.com/role/IncomeTaxesValuationAllowanceDetails" xlink:type="simple" xlink:href="amkr-20221231.xsd#IncomeTaxesValuationAllowanceDetails"/>
  <link:definitionLink xlink:role="http://www.amkor.com/role/IncomeTaxesValuationAllowanceDetails" xlink:type="extended" id="i77ad9432933e42459ab822ab302b27c9_IncomeTaxesValuationAllowanceDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowanceLineItems_ed0f9d26-ad24-42ab-803e-5f56cd5d7605" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ValuationAllowanceLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsValuationAllowance_28d0db6f-839d-4d5c-bbbf-9ad7f532145e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DeferredTaxAssetsValuationAllowance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowanceLineItems_ed0f9d26-ad24-42ab-803e-5f56cd5d7605" xlink:to="loc_us-gaap_DeferredTaxAssetsValuationAllowance_28d0db6f-839d-4d5c-bbbf-9ad7f532145e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowanceTable_0cfa11a6-a8e6-4793-b9f2-4ada46ab4906" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ValuationAllowanceTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ValuationAllowanceLineItems_ed0f9d26-ad24-42ab-803e-5f56cd5d7605" xlink:to="loc_us-gaap_ValuationAllowanceTable_0cfa11a6-a8e6-4793-b9f2-4ada46ab4906" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_8d46fcbf-2839-40c9-aa6d-49b0d340fa54" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ValuationAllowanceTable_0cfa11a6-a8e6-4793-b9f2-4ada46ab4906" xlink:to="loc_srt_StatementGeographicalAxis_8d46fcbf-2839-40c9-aa6d-49b0d340fa54" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_8d46fcbf-2839-40c9-aa6d-49b0d340fa54_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_8d46fcbf-2839-40c9-aa6d-49b0d340fa54" xlink:to="loc_srt_SegmentGeographicalDomain_8d46fcbf-2839-40c9-aa6d-49b0d340fa54_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_db46e59f-5835-41ea-86b8-5ad2601f922f" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_8d46fcbf-2839-40c9-aa6d-49b0d340fa54" xlink:to="loc_srt_SegmentGeographicalDomain_db46e59f-5835-41ea-86b8-5ad2601f922f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_027d9e2b-b3e9-442b-bf1b-1d0154afef96" xlink:href="https://xbrl.sec.gov/country/2022/country-2022.xsd#country_US"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_db46e59f-5835-41ea-86b8-5ad2601f922f" xlink:to="loc_country_US_027d9e2b-b3e9-442b-bf1b-1d0154afef96" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_PT_b44f0729-9038-4453-bf48-faf709e9347d" xlink:href="https://xbrl.sec.gov/country/2022/country-2022.xsd#country_PT"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_db46e59f-5835-41ea-86b8-5ad2601f922f" xlink:to="loc_country_PT_b44f0729-9038-4453-bf48-faf709e9347d" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.amkor.com/role/IncomeTaxesNetOperatingLossCarryforwardsDetails" xlink:type="simple" xlink:href="amkr-20221231.xsd#IncomeTaxesNetOperatingLossCarryforwardsDetails"/>
  <link:definitionLink xlink:role="http://www.amkor.com/role/IncomeTaxesNetOperatingLossCarryforwardsDetails" xlink:type="extended" id="i8f7b22c8cc794cfa893bd69c75304f36_IncomeTaxesNetOperatingLossCarryforwardsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLossCarryforwardsLineItems_eb98dd1c-527c-4107-b363-a655d7d69a8d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingLossCarryforwardsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_IncomeTaxesTextualsAbstract_0233cec9-d453-4d77-9002-ef8d6b64230b" xlink:href="amkr-20221231.xsd#amkr_IncomeTaxesTextualsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_eb98dd1c-527c-4107-b363-a655d7d69a8d" xlink:to="loc_amkr_IncomeTaxesTextualsAbstract_0233cec9-d453-4d77-9002-ef8d6b64230b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLossCarryforwards_26460335-21e9-4dcc-aa84-8ed288fd93b1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingLossCarryforwards"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_amkr_IncomeTaxesTextualsAbstract_0233cec9-d453-4d77-9002-ef8d6b64230b" xlink:to="loc_us-gaap_OperatingLossCarryforwards_26460335-21e9-4dcc-aa84-8ed288fd93b1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLossCarryforwardsTable_6a3478a6-9654-4227-ac7d-9ffbf5978614" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingLossCarryforwardsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_eb98dd1c-527c-4107-b363-a655d7d69a8d" xlink:to="loc_us-gaap_OperatingLossCarryforwardsTable_6a3478a6-9654-4227-ac7d-9ffbf5978614" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityAxis_64bdad42-5b23-4f1e-bb10-204b2553fce0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeTaxAuthorityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OperatingLossCarryforwardsTable_6a3478a6-9654-4227-ac7d-9ffbf5978614" xlink:to="loc_us-gaap_IncomeTaxAuthorityAxis_64bdad42-5b23-4f1e-bb10-204b2553fce0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_64bdad42-5b23-4f1e-bb10-204b2553fce0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeTaxAuthorityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_64bdad42-5b23-4f1e-bb10-204b2553fce0" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_64bdad42-5b23-4f1e-bb10-204b2553fce0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_8bcce606-3b5e-417d-89e3-3d84e121f89b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeTaxAuthorityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_64bdad42-5b23-4f1e-bb10-204b2553fce0" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_8bcce606-3b5e-417d-89e3-3d84e121f89b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InternalRevenueServiceIRSMember_89028b70-1df8-4f2b-a68e-89a597478527" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InternalRevenueServiceIRSMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_8bcce606-3b5e-417d-89e3-3d84e121f89b" xlink:to="loc_us-gaap_InternalRevenueServiceIRSMember_89028b70-1df8-4f2b-a68e-89a597478527" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StateAndLocalJurisdictionMember_b1ff4a78-09cc-4862-91db-48de221b7b76" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StateAndLocalJurisdictionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_8bcce606-3b5e-417d-89e3-3d84e121f89b" xlink:to="loc_us-gaap_StateAndLocalJurisdictionMember_b1ff4a78-09cc-4862-91db-48de221b7b76" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonUsMember_5811705b-de37-4a9a-a46b-52c7cfe1620d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NonUsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_8bcce606-3b5e-417d-89e3-3d84e121f89b" xlink:to="loc_us-gaap_NonUsMember_5811705b-de37-4a9a-a46b-52c7cfe1620d" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.amkor.com/role/IncomeTaxesTaxCreditCarryforwardsDetails" xlink:type="simple" xlink:href="amkr-20221231.xsd#IncomeTaxesTaxCreditCarryforwardsDetails"/>
  <link:definitionLink xlink:role="http://www.amkor.com/role/IncomeTaxesTaxCreditCarryforwardsDetails" xlink:type="extended" id="i179f3978ed824b5784223382d6fc5d51_IncomeTaxesTaxCreditCarryforwardsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxCreditCarryforwardLineItems_f0152232-a029-48cd-b475-4acc3b0b74bd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TaxCreditCarryforwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxCreditCarryforwardAmount_e01adc5c-93dd-4916-9747-989119a06956" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TaxCreditCarryforwardAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TaxCreditCarryforwardLineItems_f0152232-a029-48cd-b475-4acc3b0b74bd" xlink:to="loc_us-gaap_TaxCreditCarryforwardAmount_e01adc5c-93dd-4916-9747-989119a06956" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxCreditCarryforwardTable_6b74d8f3-bacc-4616-b635-beb80335a724" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TaxCreditCarryforwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_TaxCreditCarryforwardLineItems_f0152232-a029-48cd-b475-4acc3b0b74bd" xlink:to="loc_us-gaap_TaxCreditCarryforwardTable_6b74d8f3-bacc-4616-b635-beb80335a724" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityAxis_3a9e0c25-6233-46d9-8518-4c40db13e07b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeTaxAuthorityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_TaxCreditCarryforwardTable_6b74d8f3-bacc-4616-b635-beb80335a724" xlink:to="loc_us-gaap_IncomeTaxAuthorityAxis_3a9e0c25-6233-46d9-8518-4c40db13e07b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_3a9e0c25-6233-46d9-8518-4c40db13e07b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeTaxAuthorityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_3a9e0c25-6233-46d9-8518-4c40db13e07b" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_3a9e0c25-6233-46d9-8518-4c40db13e07b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_604f8cfb-23dc-4670-8f67-8b8d06ac8e05" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeTaxAuthorityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_3a9e0c25-6233-46d9-8518-4c40db13e07b" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_604f8cfb-23dc-4670-8f67-8b8d06ac8e05" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DomesticCountryMember_d172ad0b-229b-4ee7-a520-64b1b06690ca" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DomesticCountryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_604f8cfb-23dc-4670-8f67-8b8d06ac8e05" xlink:to="loc_us-gaap_DomesticCountryMember_d172ad0b-229b-4ee7-a520-64b1b06690ca" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCountryMember_0ec19d27-2d72-49b9-bf96-6290d9737b69" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ForeignCountryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_604f8cfb-23dc-4670-8f67-8b8d06ac8e05" xlink:to="loc_us-gaap_ForeignCountryMember_0ec19d27-2d72-49b9-bf96-6290d9737b69" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxCreditCarryforwardAxis_4089c51a-2b05-4b84-ac6a-0e4939c7aec6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TaxCreditCarryforwardAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_TaxCreditCarryforwardTable_6b74d8f3-bacc-4616-b635-beb80335a724" xlink:to="loc_us-gaap_TaxCreditCarryforwardAxis_4089c51a-2b05-4b84-ac6a-0e4939c7aec6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxCreditCarryforwardNameDomain_4089c51a-2b05-4b84-ac6a-0e4939c7aec6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TaxCreditCarryforwardNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_TaxCreditCarryforwardAxis_4089c51a-2b05-4b84-ac6a-0e4939c7aec6" xlink:to="loc_us-gaap_TaxCreditCarryforwardNameDomain_4089c51a-2b05-4b84-ac6a-0e4939c7aec6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxCreditCarryforwardNameDomain_3b94994d-cbd3-4bc9-b200-265fa99b1e3d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TaxCreditCarryforwardNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_TaxCreditCarryforwardAxis_4089c51a-2b05-4b84-ac6a-0e4939c7aec6" xlink:to="loc_us-gaap_TaxCreditCarryforwardNameDomain_3b94994d-cbd3-4bc9-b200-265fa99b1e3d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_ForeignTaxCreditCarryforwardMember_21712290-ebd0-455f-ba53-405ac36a2f03" xlink:href="amkr-20221231.xsd#amkr_ForeignTaxCreditCarryforwardMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TaxCreditCarryforwardNameDomain_3b94994d-cbd3-4bc9-b200-265fa99b1e3d" xlink:to="loc_amkr_ForeignTaxCreditCarryforwardMember_21712290-ebd0-455f-ba53-405ac36a2f03" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_OtherTaxCreditCarryforwardMember_5908171f-76f6-48bb-b386-4a75585b3a71" xlink:href="amkr-20221231.xsd#amkr_OtherTaxCreditCarryforwardMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TaxCreditCarryforwardNameDomain_3b94994d-cbd3-4bc9-b200-265fa99b1e3d" xlink:to="loc_amkr_OtherTaxCreditCarryforwardMember_5908171f-76f6-48bb-b386-4a75585b3a71" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.amkor.com/role/InvestmentsSummaryofCashEquivalentsandShorttermInvestmentsDetails" xlink:type="simple" xlink:href="amkr-20221231.xsd#InvestmentsSummaryofCashEquivalentsandShorttermInvestmentsDetails"/>
  <link:definitionLink xlink:role="http://www.amkor.com/role/InvestmentsSummaryofCashEquivalentsandShorttermInvestmentsDetails" xlink:type="extended" id="i9e4fa161f63447bbab7f2c4c219a5c07_InvestmentsSummaryofCashEquivalentsandShorttermInvestmentsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_536874f8-17dc-444a-aa30-3330e567c8e8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashEquivalentsAtCarryingValue_b3004658-9bb0-4fe9-a475-b1ec44f3e4de" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CashEquivalentsAtCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_536874f8-17dc-444a-aa30-3330e567c8e8" xlink:to="loc_us-gaap_CashEquivalentsAtCarryingValue_b3004658-9bb0-4fe9-a475-b1ec44f3e4de" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_CashEquivalentsGrossUnrealizedGains_fdf8283f-00bf-4507-b53a-d78afc478060" xlink:href="amkr-20221231.xsd#amkr_CashEquivalentsGrossUnrealizedGains"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_536874f8-17dc-444a-aa30-3330e567c8e8" xlink:to="loc_amkr_CashEquivalentsGrossUnrealizedGains_fdf8283f-00bf-4507-b53a-d78afc478060" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_CashEquivalentsGrossUnrealizedLosses_ab3184b8-6aca-4c95-9433-621a69fcc8f5" xlink:href="amkr-20221231.xsd#amkr_CashEquivalentsGrossUnrealizedLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_536874f8-17dc-444a-aa30-3330e567c8e8" xlink:to="loc_amkr_CashEquivalentsGrossUnrealizedLosses_ab3184b8-6aca-4c95-9433-621a69fcc8f5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_CashEquivalentFairValueDisclosure_8eb73b2f-f311-42a0-966d-ea28126cfabc" xlink:href="amkr-20221231.xsd#amkr_CashEquivalentFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_536874f8-17dc-444a-aa30-3330e567c8e8" xlink:to="loc_amkr_CashEquivalentFairValueDisclosure_8eb73b2f-f311-42a0-966d-ea28126cfabc" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_2febb61e-2d60-4058-ae0d-542a7394b269" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_536874f8-17dc-444a-aa30-3330e567c8e8" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_2febb61e-2d60-4058-ae0d-542a7394b269" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_f1d48f7d-2853-4d0f-8499-a488ca96eae1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_536874f8-17dc-444a-aa30-3330e567c8e8" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_f1d48f7d-2853-4d0f-8499-a488ca96eae1" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_63a4ee2c-0850-4437-ac05-45af18cf7783" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_536874f8-17dc-444a-aa30-3330e567c8e8" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_63a4ee2c-0850-4437-ac05-45af18cf7783" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_5cc4041d-5f8f-4b88-af07-371755eb606f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_536874f8-17dc-444a-aa30-3330e567c8e8" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_5cc4041d-5f8f-4b88-af07-371755eb606f" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_DebtSecuritiesAvailableForSaleAndCashEquivalentsAmortizedCost_46656fc8-cd73-4700-afa8-95d5978ddb2b" xlink:href="amkr-20221231.xsd#amkr_DebtSecuritiesAvailableForSaleAndCashEquivalentsAmortizedCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_536874f8-17dc-444a-aa30-3330e567c8e8" xlink:to="loc_amkr_DebtSecuritiesAvailableForSaleAndCashEquivalentsAmortizedCost_46656fc8-cd73-4700-afa8-95d5978ddb2b" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_DebtSecuritiesAvailableForSaleAndCashEquivalentsAccumulatedGrossUnrealizedGainBeforeTax_afbb31a0-ddf0-40d6-9597-5d258a738a7c" xlink:href="amkr-20221231.xsd#amkr_DebtSecuritiesAvailableForSaleAndCashEquivalentsAccumulatedGrossUnrealizedGainBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_536874f8-17dc-444a-aa30-3330e567c8e8" xlink:to="loc_amkr_DebtSecuritiesAvailableForSaleAndCashEquivalentsAccumulatedGrossUnrealizedGainBeforeTax_afbb31a0-ddf0-40d6-9597-5d258a738a7c" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_DebtSecuritiesAvailableForSaleAndCashEquivalentsAccumulatedGrossUnrealizedLossBeforeTax_5b2ff05c-e89d-4802-aef4-43db96913fa6" xlink:href="amkr-20221231.xsd#amkr_DebtSecuritiesAvailableForSaleAndCashEquivalentsAccumulatedGrossUnrealizedLossBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_536874f8-17dc-444a-aa30-3330e567c8e8" xlink:to="loc_amkr_DebtSecuritiesAvailableForSaleAndCashEquivalentsAccumulatedGrossUnrealizedLossBeforeTax_5b2ff05c-e89d-4802-aef4-43db96913fa6" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_DebtSecuritiesAvailableForSaleAndCashEquivalentsFairValueDisclosure_cf2ce91d-f562-40ea-9ed7-ce7827ba1f04" xlink:href="amkr-20221231.xsd#amkr_DebtSecuritiesAvailableForSaleAndCashEquivalentsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_536874f8-17dc-444a-aa30-3330e567c8e8" xlink:to="loc_amkr_DebtSecuritiesAvailableForSaleAndCashEquivalentsFairValueDisclosure_cf2ce91d-f562-40ea-9ed7-ce7827ba1f04" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_e235b026-5453-4c39-8baf-b76f41e7dae7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_536874f8-17dc-444a-aa30-3330e567c8e8" xlink:to="loc_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_e235b026-5453-4c39-8baf-b76f41e7dae7" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_10d6f8a1-c842-4a9f-b3ea-be65617b140e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtSecuritiesAvailableForSaleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_536874f8-17dc-444a-aa30-3330e567c8e8" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_10d6f8a1-c842-4a9f-b3ea-be65617b140e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_59db0d69-ec41-4f7a-886c-f8af42df4428" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_10d6f8a1-c842-4a9f-b3ea-be65617b140e" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_59db0d69-ec41-4f7a-886c-f8af42df4428" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_59db0d69-ec41-4f7a-886c-f8af42df4428_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_59db0d69-ec41-4f7a-886c-f8af42df4428" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_59db0d69-ec41-4f7a-886c-f8af42df4428_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_ed220329-46e1-4368-8dc4-c8c11dbf6c87" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_59db0d69-ec41-4f7a-886c-f8af42df4428" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_ed220329-46e1-4368-8dc4-c8c11dbf6c87" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_39620ac7-568d-4539-86d1-8c672e9c6a28" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_ed220329-46e1-4368-8dc4-c8c11dbf6c87" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_39620ac7-568d-4539-86d1-8c672e9c6a28" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_96a8ee98-9673-49eb-a81d-c19e13418138" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_ed220329-46e1-4368-8dc4-c8c11dbf6c87" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_96a8ee98-9673-49eb-a81d-c19e13418138" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAxis_6a2d5a1d-4522-4db2-a808-f0415b5a97f4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CashAndCashEquivalentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_10d6f8a1-c842-4a9f-b3ea-be65617b140e" xlink:to="loc_us-gaap_CashAndCashEquivalentsAxis_6a2d5a1d-4522-4db2-a808-f0415b5a97f4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_6a2d5a1d-4522-4db2-a808-f0415b5a97f4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CashAndCashEquivalentsAxis_6a2d5a1d-4522-4db2-a808-f0415b5a97f4" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_6a2d5a1d-4522-4db2-a808-f0415b5a97f4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_0451bac9-c5a0-4e52-9e0f-6bcc5a33418b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CashAndCashEquivalentsAxis_6a2d5a1d-4522-4db2-a808-f0415b5a97f4" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_0451bac9-c5a0-4e52-9e0f-6bcc5a33418b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashEquivalentsMember_0669a379-1239-476e-b058-9308b8cf1dcb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_0451bac9-c5a0-4e52-9e0f-6bcc5a33418b" xlink:to="loc_us-gaap_CashEquivalentsMember_0669a379-1239-476e-b058-9308b8cf1dcb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetBackedSecuritiesMember_5070b186-76f0-4b89-a50b-1125abcb57ea" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashEquivalentsMember_0669a379-1239-476e-b058-9308b8cf1dcb" xlink:to="loc_us-gaap_AssetBackedSecuritiesMember_5070b186-76f0-4b89-a50b-1125abcb57ea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaperMember_feb77fb6-14f3-4291-bd55-3a0f85989e2e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommercialPaperMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashEquivalentsMember_0669a379-1239-476e-b058-9308b8cf1dcb" xlink:to="loc_us-gaap_CommercialPaperMember_feb77fb6-14f3-4291-bd55-3a0f85989e2e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MoneyMarketFundsMember_202b9c2a-532e-40dd-aaba-e97dc8f488eb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MoneyMarketFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashEquivalentsMember_0669a379-1239-476e-b058-9308b8cf1dcb" xlink:to="loc_us-gaap_MoneyMarketFundsMember_202b9c2a-532e-40dd-aaba-e97dc8f488eb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MunicipalBondsMember_0e8f810c-904b-46ec-a359-e12857eb23f4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MunicipalBondsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashEquivalentsMember_0669a379-1239-476e-b058-9308b8cf1dcb" xlink:to="loc_us-gaap_MunicipalBondsMember_0e8f810c-904b-46ec-a359-e12857eb23f4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USTreasurySecuritiesMember_ab83fbfb-7ee4-4438-bd3e-83a91dc82149" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_USTreasurySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashEquivalentsMember_0669a379-1239-476e-b058-9308b8cf1dcb" xlink:to="loc_us-gaap_USTreasurySecuritiesMember_ab83fbfb-7ee4-4438-bd3e-83a91dc82149" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_ef77738e-bc55-4b6e-b20d-b159d1ff34ed" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_USGovernmentAgenciesDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashEquivalentsMember_0669a379-1239-476e-b058-9308b8cf1dcb" xlink:to="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_ef77738e-bc55-4b6e-b20d-b159d1ff34ed" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateBondSecuritiesMember_4ae8c4bd-1814-4c1f-bec6-706b8f072b7e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CorporateBondSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashEquivalentsMember_0669a379-1239-476e-b058-9308b8cf1dcb" xlink:to="loc_us-gaap_CorporateBondSecuritiesMember_4ae8c4bd-1814-4c1f-bec6-706b8f072b7e" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_1ed4232c-5f57-451b-9595-3c3a7efb2cb1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_10d6f8a1-c842-4a9f-b3ea-be65617b140e" xlink:to="loc_us-gaap_FinancialInstrumentAxis_1ed4232c-5f57-451b-9595-3c3a7efb2cb1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_1ed4232c-5f57-451b-9595-3c3a7efb2cb1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_1ed4232c-5f57-451b-9595-3c3a7efb2cb1" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_1ed4232c-5f57-451b-9595-3c3a7efb2cb1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_a355e847-89f1-4ddf-9ecc-a9f6f8b92e84" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_1ed4232c-5f57-451b-9595-3c3a7efb2cb1" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_a355e847-89f1-4ddf-9ecc-a9f6f8b92e84" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermInvestmentsMember_f5df43e5-d45b-4e83-a221-88666d30fa27" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShortTermInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_a355e847-89f1-4ddf-9ecc-a9f6f8b92e84" xlink:to="loc_us-gaap_ShortTermInvestmentsMember_f5df43e5-d45b-4e83-a221-88666d30fa27" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetBackedSecuritiesMember_5106b3ee-659e-48ed-9007-249be3aeee01" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermInvestmentsMember_f5df43e5-d45b-4e83-a221-88666d30fa27" xlink:to="loc_us-gaap_AssetBackedSecuritiesMember_5106b3ee-659e-48ed-9007-249be3aeee01" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CertificatesOfDepositMember_0c0bcbe8-6ea8-4f75-8608-2b75b75557ee" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CertificatesOfDepositMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermInvestmentsMember_f5df43e5-d45b-4e83-a221-88666d30fa27" xlink:to="loc_us-gaap_CertificatesOfDepositMember_0c0bcbe8-6ea8-4f75-8608-2b75b75557ee" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaperMember_1855986a-df83-4168-9642-1a74fbf36640" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommercialPaperMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermInvestmentsMember_f5df43e5-d45b-4e83-a221-88666d30fa27" xlink:to="loc_us-gaap_CommercialPaperMember_1855986a-df83-4168-9642-1a74fbf36640" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateBondSecuritiesMember_6f352d7f-c9f5-4539-a9c6-3167754c6fde" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CorporateBondSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermInvestmentsMember_f5df43e5-d45b-4e83-a221-88666d30fa27" xlink:to="loc_us-gaap_CorporateBondSecuritiesMember_6f352d7f-c9f5-4539-a9c6-3167754c6fde" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignGovernmentShorttermDebtSecuritiesMember_7d3b5f70-7e77-47a8-802e-63dbd99d7379" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ForeignGovernmentShorttermDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermInvestmentsMember_f5df43e5-d45b-4e83-a221-88666d30fa27" xlink:to="loc_us-gaap_ForeignGovernmentShorttermDebtSecuritiesMember_7d3b5f70-7e77-47a8-802e-63dbd99d7379" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MortgageBackedSecuritiesOtherMember_1f97e7c1-7cc7-4d3c-bded-57506be4b1c6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MortgageBackedSecuritiesOtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermInvestmentsMember_f5df43e5-d45b-4e83-a221-88666d30fa27" xlink:to="loc_us-gaap_MortgageBackedSecuritiesOtherMember_1f97e7c1-7cc7-4d3c-bded-57506be4b1c6" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MunicipalBondsMember_dd998287-213d-4575-906a-220f4b328056" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MunicipalBondsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermInvestmentsMember_f5df43e5-d45b-4e83-a221-88666d30fa27" xlink:to="loc_us-gaap_MunicipalBondsMember_dd998287-213d-4575-906a-220f4b328056" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_940f60fb-d0be-4f45-afdf-e71d526d9815" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_USGovernmentAgenciesDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermInvestmentsMember_f5df43e5-d45b-4e83-a221-88666d30fa27" xlink:to="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_940f60fb-d0be-4f45-afdf-e71d526d9815" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USTreasurySecuritiesMember_827d4e06-5312-4543-aa0d-e25b3eaaa3c9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_USTreasurySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermInvestmentsMember_f5df43e5-d45b-4e83-a221-88666d30fa27" xlink:to="loc_us-gaap_USTreasurySecuritiesMember_827d4e06-5312-4543-aa0d-e25b3eaaa3c9" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDemandObligationMember_5723df75-bde7-41b2-b2be-16cef130a9e0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_VariableRateDemandObligationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermInvestmentsMember_f5df43e5-d45b-4e83-a221-88666d30fa27" xlink:to="loc_us-gaap_VariableRateDemandObligationMember_5723df75-bde7-41b2-b2be-16cef130a9e0" xlink:type="arc" order="10"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.amkor.com/role/InvestmentsNarrativeDetails" xlink:type="simple" xlink:href="amkr-20221231.xsd#InvestmentsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.amkor.com/role/InvestmentsNarrativeDetails" xlink:type="extended" id="i1e6c4ce495a24141823ae0f93afaf8cd_InvestmentsNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_718d90ad-971a-454d-900f-87d7c02344bb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesHeldToMaturityExcludingAccruedInterestAfterAllowanceForCreditLoss_6a551691-189c-4fcb-8517-ca11d8f23c5e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtSecuritiesHeldToMaturityExcludingAccruedInterestAfterAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_718d90ad-971a-454d-900f-87d7c02344bb" xlink:to="loc_us-gaap_DebtSecuritiesHeldToMaturityExcludingAccruedInterestAfterAllowanceForCreditLoss_6a551691-189c-4fcb-8517-ca11d8f23c5e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesFairValue_55f6002c-7ce0-4488-b52d-5e399fbbacc0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_HeldToMaturitySecuritiesFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_718d90ad-971a-454d-900f-87d7c02344bb" xlink:to="loc_us-gaap_HeldToMaturitySecuritiesFairValue_55f6002c-7ce0-4488-b52d-5e399fbbacc0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable_75a5f8ec-4fc4-4ed1-81c0-4d839bcbf0a9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_718d90ad-971a-454d-900f-87d7c02344bb" xlink:to="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable_75a5f8ec-4fc4-4ed1-81c0-4d839bcbf0a9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_521a5599-685e-4049-9a2d-f5a49afa2410" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable_75a5f8ec-4fc4-4ed1-81c0-4d839bcbf0a9" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_521a5599-685e-4049-9a2d-f5a49afa2410" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_521a5599-685e-4049-9a2d-f5a49afa2410_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_521a5599-685e-4049-9a2d-f5a49afa2410" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_521a5599-685e-4049-9a2d-f5a49afa2410_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_fc6e37c6-2651-4eef-aa0b-489d3e8a3904" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_521a5599-685e-4049-9a2d-f5a49afa2410" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_fc6e37c6-2651-4eef-aa0b-489d3e8a3904" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_fdd3784c-6f21-44a1-8e92-a8d65e1571cf" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_fc6e37c6-2651-4eef-aa0b-489d3e8a3904" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_fdd3784c-6f21-44a1-8e92-a8d65e1571cf" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.amkor.com/role/FactoringofAccountsReceivableDetails" xlink:type="simple" xlink:href="amkr-20221231.xsd#FactoringofAccountsReceivableDetails"/>
  <link:definitionLink xlink:role="http://www.amkor.com/role/FactoringofAccountsReceivableDetails" xlink:type="extended" id="i1df064bfea81458690a2b81b6963d0c8_FactoringofAccountsReceivableDetails">
    <link:loc xlink:type="locator" xlink:label="loc_amkr_FactoringofAccountsReceivableLineItems_fd3a8aad-765f-475c-a0af-3c291504a8b6" xlink:href="amkr-20221231.xsd#amkr_FactoringofAccountsReceivableLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_AccountsReceivableSoldwithoutRecourse_99879b97-a308-4e8b-b4e7-6af8240bc22b" xlink:href="amkr-20221231.xsd#amkr_AccountsReceivableSoldwithoutRecourse"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_amkr_FactoringofAccountsReceivableLineItems_fd3a8aad-765f-475c-a0af-3c291504a8b6" xlink:to="loc_amkr_AccountsReceivableSoldwithoutRecourse_99879b97-a308-4e8b-b4e7-6af8240bc22b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_FactoringofAccountsReceivableTable_4b3813f9-8560-4134-859d-fe9fcf6d9c56" xlink:href="amkr-20221231.xsd#amkr_FactoringofAccountsReceivableTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_amkr_FactoringofAccountsReceivableLineItems_fd3a8aad-765f-475c-a0af-3c291504a8b6" xlink:to="loc_amkr_FactoringofAccountsReceivableTable_4b3813f9-8560-4134-859d-fe9fcf6d9c56" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_FactoringofAccountsReceivableAxis_65710f2c-7d9e-443f-a198-2f69d70ff413" xlink:href="amkr-20221231.xsd#amkr_FactoringofAccountsReceivableAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_amkr_FactoringofAccountsReceivableTable_4b3813f9-8560-4134-859d-fe9fcf6d9c56" xlink:to="loc_amkr_FactoringofAccountsReceivableAxis_65710f2c-7d9e-443f-a198-2f69d70ff413" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_FactoringofAccountsReceivableDomain_65710f2c-7d9e-443f-a198-2f69d70ff413_default" xlink:href="amkr-20221231.xsd#amkr_FactoringofAccountsReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_amkr_FactoringofAccountsReceivableAxis_65710f2c-7d9e-443f-a198-2f69d70ff413" xlink:to="loc_amkr_FactoringofAccountsReceivableDomain_65710f2c-7d9e-443f-a198-2f69d70ff413_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_FactoringofAccountsReceivableDomain_a1cffe52-3019-4aca-9f87-e9618db082fc" xlink:href="amkr-20221231.xsd#amkr_FactoringofAccountsReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_amkr_FactoringofAccountsReceivableAxis_65710f2c-7d9e-443f-a198-2f69d70ff413" xlink:to="loc_amkr_FactoringofAccountsReceivableDomain_a1cffe52-3019-4aca-9f87-e9618db082fc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_TotalFactoredMember_20870751-024b-4cfc-ba5d-a2d90a743981" xlink:href="amkr-20221231.xsd#amkr_TotalFactoredMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_amkr_FactoringofAccountsReceivableDomain_a1cffe52-3019-4aca-9f87-e9618db082fc" xlink:to="loc_amkr_TotalFactoredMember_20870751-024b-4cfc-ba5d-a2d90a743981" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_FactoringFeesMember_9f7f6c98-763c-42ee-be77-05f934a2b798" xlink:href="amkr-20221231.xsd#amkr_FactoringFeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_amkr_FactoringofAccountsReceivableDomain_a1cffe52-3019-4aca-9f87-e9618db082fc" xlink:to="loc_amkr_FactoringFeesMember_9f7f6c98-763c-42ee-be77-05f934a2b798" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.amkor.com/role/PropertyPlantandEquipmentDetails" xlink:type="simple" xlink:href="amkr-20221231.xsd#PropertyPlantandEquipmentDetails"/>
  <link:definitionLink xlink:role="http://www.amkor.com/role/PropertyPlantandEquipmentDetails" xlink:type="extended" id="i6c9900233d5e4395ae8c2a9c56dff853_PropertyPlantandEquipmentDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_f6b985b6-a12b-475d-ba3e-6f70ae6e7a8b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_8b76cfd6-06e2-43d9-94f9-bf24ef5995ac" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_f6b985b6-a12b-475d-ba3e-6f70ae6e7a8b" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_8b76cfd6-06e2-43d9-94f9-bf24ef5995ac" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization_1f9a3505-d287-4950-9208-8aa81b53a8ce" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_f6b985b6-a12b-475d-ba3e-6f70ae6e7a8b" xlink:to="loc_us-gaap_FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization_1f9a3505-d287-4950-9208-8aa81b53a8ce" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization_06e04bf1-d436-4305-bd11-555948b69678" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_f6b985b6-a12b-475d-ba3e-6f70ae6e7a8b" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization_06e04bf1-d436-4305-bd11-555948b69678" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization_494d1ed0-d12a-42b3-aa4f-63c81ce5b057" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_f6b985b6-a12b-475d-ba3e-6f70ae6e7a8b" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization_494d1ed0-d12a-42b3-aa4f-63c81ce5b057" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_58c05aef-e9a1-4a85-9797-0a7e60ea348b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_f6b985b6-a12b-475d-ba3e-6f70ae6e7a8b" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_58c05aef-e9a1-4a85-9797-0a7e60ea348b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_fbbcc1c8-98c9-4d6d-beac-018144dc4275" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_f6b985b6-a12b-475d-ba3e-6f70ae6e7a8b" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_fbbcc1c8-98c9-4d6d-beac-018144dc4275" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_1251ba67-6d8c-4389-b8b6-b89e779077b8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_fbbcc1c8-98c9-4d6d-beac-018144dc4275" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_1251ba67-6d8c-4389-b8b6-b89e779077b8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_1251ba67-6d8c-4389-b8b6-b89e779077b8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_1251ba67-6d8c-4389-b8b6-b89e779077b8" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_1251ba67-6d8c-4389-b8b6-b89e779077b8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_60bf122d-7091-41d6-a946-d5ad4885a70e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_1251ba67-6d8c-4389-b8b6-b89e779077b8" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_60bf122d-7091-41d6-a946-d5ad4885a70e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LandMember_312c3391-3247-40f0-b7fa-a07def59d51e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LandMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_60bf122d-7091-41d6-a946-d5ad4885a70e" xlink:to="loc_us-gaap_LandMember_312c3391-3247-40f0-b7fa-a07def59d51e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BuildingAndBuildingImprovementsMember_27157b8f-04b8-41a2-965a-29b4f8f12d13" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BuildingAndBuildingImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_60bf122d-7091-41d6-a946-d5ad4885a70e" xlink:to="loc_us-gaap_BuildingAndBuildingImprovementsMember_27157b8f-04b8-41a2-965a-29b4f8f12d13" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MachineryAndEquipmentMember_f86102f3-2f9a-406a-97e1-1b5b01e0379e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MachineryAndEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_60bf122d-7091-41d6-a946-d5ad4885a70e" xlink:to="loc_us-gaap_MachineryAndEquipmentMember_f86102f3-2f9a-406a-97e1-1b5b01e0379e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FurnitureAndFixturesMember_20b4398c-33ec-43fe-ba81-f3e4abbdff41" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FurnitureAndFixturesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_60bf122d-7091-41d6-a946-d5ad4885a70e" xlink:to="loc_us-gaap_FurnitureAndFixturesMember_20b4398c-33ec-43fe-ba81-f3e4abbdff41" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_SoftwareAndComputerEquipmentMember_e08471d8-89eb-4438-9956-9a8631dcae5b" xlink:href="amkr-20221231.xsd#amkr_SoftwareAndComputerEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_60bf122d-7091-41d6-a946-d5ad4885a70e" xlink:to="loc_amkr_SoftwareAndComputerEquipmentMember_e08471d8-89eb-4438-9956-9a8631dcae5b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConstructionInProgressMember_67959e80-ece8-4480-900b-923876c0c5db" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConstructionInProgressMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_60bf122d-7091-41d6-a946-d5ad4885a70e" xlink:to="loc_us-gaap_ConstructionInProgressMember_67959e80-ece8-4480-900b-923876c0c5db" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.amkor.com/role/PropertyPlantandEquipmentNarrativeDetails" xlink:type="simple" xlink:href="amkr-20221231.xsd#PropertyPlantandEquipmentNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.amkor.com/role/PropertyPlantandEquipmentNarrativeDetails" xlink:type="extended" id="ic30340ebf0d84752b8c8000e68a4e891_PropertyPlantandEquipmentNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_b3214c60-1de1-4706-9239-75369639a31d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_PropertyPlantAndEquipmentCapitalizedCosts_6e89fa70-a139-44c8-b8d9-600c8f40b20c" xlink:href="amkr-20221231.xsd#amkr_PropertyPlantAndEquipmentCapitalizedCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_b3214c60-1de1-4706-9239-75369639a31d" xlink:to="loc_amkr_PropertyPlantAndEquipmentCapitalizedCosts_6e89fa70-a139-44c8-b8d9-600c8f40b20c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_PropertyPlantAndEquipmentCapitalizedInterest_350af992-3533-405c-ac24-d17344bf0424" xlink:href="amkr-20221231.xsd#amkr_PropertyPlantAndEquipmentCapitalizedInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_b3214c60-1de1-4706-9239-75369639a31d" xlink:to="loc_amkr_PropertyPlantAndEquipmentCapitalizedInterest_350af992-3533-405c-ac24-d17344bf0424" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_5a2ccea6-9124-4151-8ac5-760b33e6378c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_b3214c60-1de1-4706-9239-75369639a31d" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_5a2ccea6-9124-4151-8ac5-760b33e6378c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_f8a7d1e3-54c7-4f34-87f3-817b81d227de" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_5a2ccea6-9124-4151-8ac5-760b33e6378c" xlink:to="loc_srt_StatementGeographicalAxis_f8a7d1e3-54c7-4f34-87f3-817b81d227de" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_f8a7d1e3-54c7-4f34-87f3-817b81d227de_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_f8a7d1e3-54c7-4f34-87f3-817b81d227de" xlink:to="loc_srt_SegmentGeographicalDomain_f8a7d1e3-54c7-4f34-87f3-817b81d227de_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_05ab4274-83a4-4281-96f0-e01adcffad18" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_f8a7d1e3-54c7-4f34-87f3-817b81d227de" xlink:to="loc_srt_SegmentGeographicalDomain_05ab4274-83a4-4281-96f0-e01adcffad18" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_VN_9789c14c-22df-44d1-a14f-980c4c64cc57" xlink:href="https://xbrl.sec.gov/country/2022/country-2022.xsd#country_VN"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_05ab4274-83a4-4281-96f0-e01adcffad18" xlink:to="loc_country_VN_9789c14c-22df-44d1-a14f-980c4c64cc57" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.amkor.com/role/DebtLongTermDebtDetails" xlink:type="simple" xlink:href="amkr-20221231.xsd#DebtLongTermDebtDetails"/>
  <link:definitionLink xlink:role="http://www.amkor.com/role/DebtLongTermDebtDetails" xlink:type="extended" id="i0e8d4c864457459da3c51ed1f7790776_DebtLongTermDebtDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_0dd447d5-3d5a-48f5-a7c5-926b18574731" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_e23c4dea-8b86-4bf7-80c0-75e00ad85831" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0dd447d5-3d5a-48f5-a7c5-926b18574731" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_e23c4dea-8b86-4bf7-80c0-75e00ad85831" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_DebtInstrumentInterestRateMarginOnApplicableBankRate_1d8c219a-2951-426e-9567-00bdc3ca48f2" xlink:href="amkr-20221231.xsd#amkr_DebtInstrumentInterestRateMarginOnApplicableBankRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0dd447d5-3d5a-48f5-a7c5-926b18574731" xlink:to="loc_amkr_DebtInstrumentInterestRateMarginOnApplicableBankRate_1d8c219a-2951-426e-9567-00bdc3ca48f2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_5eecb7dc-9464-4fda-a9a3-9f5922fdd486" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0dd447d5-3d5a-48f5-a7c5-926b18574731" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_5eecb7dc-9464-4fda-a9a3-9f5922fdd486" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtLongtermAndShorttermCombinedAmount_39209d6c-c22d-4cc9-898e-7ef7e472820c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtLongtermAndShorttermCombinedAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0dd447d5-3d5a-48f5-a7c5-926b18574731" xlink:to="loc_us-gaap_DebtLongtermAndShorttermCombinedAmount_39209d6c-c22d-4cc9-898e-7ef7e472820c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_253dab1c-55cd-4937-8732-b942bc776617" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0dd447d5-3d5a-48f5-a7c5-926b18574731" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_253dab1c-55cd-4937-8732-b942bc776617" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtCurrent_27da1f05-9f5a-4c14-91c3-3bbf44fe00df" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0dd447d5-3d5a-48f5-a7c5-926b18574731" xlink:to="loc_us-gaap_DebtCurrent_27da1f05-9f5a-4c14-91c3-3bbf44fe00df" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_2f8c8fba-f936-4376-877d-167e1e9d8647" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongTermDebtNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0dd447d5-3d5a-48f5-a7c5-926b18574731" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_2f8c8fba-f936-4376-877d-167e1e9d8647" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_10a7d28b-3a54-40a6-b074-f1b41c2e3530" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0dd447d5-3d5a-48f5-a7c5-926b18574731" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_10a7d28b-3a54-40a6-b074-f1b41c2e3530" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnusedBorrowingCapacityAmount_61d0de1f-f6d1-44cd-9c32-501099e410c5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentUnusedBorrowingCapacityAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0dd447d5-3d5a-48f5-a7c5-926b18574731" xlink:to="loc_us-gaap_DebtInstrumentUnusedBorrowingCapacityAmount_61d0de1f-f6d1-44cd-9c32-501099e410c5" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_DebtInstrumentGracePeriod_a605e89f-f6d7-47cd-946b-f7093b6d2557" xlink:href="amkr-20221231.xsd#amkr_DebtInstrumentGracePeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0dd447d5-3d5a-48f5-a7c5-926b18574731" xlink:to="loc_amkr_DebtInstrumentGracePeriod_a605e89f-f6d7-47cd-946b-f7093b6d2557" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_704e2ff9-746c-4cfa-97ea-77cdc57a1949" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ProceedsFromIssuanceOfLongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0dd447d5-3d5a-48f5-a7c5-926b18574731" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_704e2ff9-746c-4cfa-97ea-77cdc57a1949" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_DebtInstrumentPrincipalPaymentNumberOfQuarterlyInstallments_eacc39ac-1de8-4389-99fc-fbb8b288b8da" xlink:href="amkr-20221231.xsd#amkr_DebtInstrumentPrincipalPaymentNumberOfQuarterlyInstallments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0dd447d5-3d5a-48f5-a7c5-926b18574731" xlink:to="loc_amkr_DebtInstrumentPrincipalPaymentNumberOfQuarterlyInstallments_eacc39ac-1de8-4389-99fc-fbb8b288b8da" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_DebtInstrumentNumber_58ea012a-6d2d-4d3e-8714-9dd8804121fd" xlink:href="amkr-20221231.xsd#amkr_DebtInstrumentNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0dd447d5-3d5a-48f5-a7c5-926b18574731" xlink:to="loc_amkr_DebtInstrumentNumber_58ea012a-6d2d-4d3e-8714-9dd8804121fd" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentPeriodicPaymentPrincipal_6f3f09d3-26a1-4998-bdb1-b5db537fba2e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentPeriodicPaymentPrincipal"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0dd447d5-3d5a-48f5-a7c5-926b18574731" xlink:to="loc_us-gaap_DebtInstrumentPeriodicPaymentPrincipal_6f3f09d3-26a1-4998-bdb1-b5db537fba2e" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTerm_575a809e-8ef3-480a-a4c3-8aadbf06ce25" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0dd447d5-3d5a-48f5-a7c5-926b18574731" xlink:to="loc_us-gaap_DebtInstrumentTerm_575a809e-8ef3-480a-a4c3-8aadbf06ce25" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_1eb4e350-cdba-4287-b635-9c2829cc3fb9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0dd447d5-3d5a-48f5-a7c5-926b18574731" xlink:to="loc_us-gaap_LongTermDebt_1eb4e350-cdba-4287-b635-9c2829cc3fb9" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_1e2a1021-8463-4cf4-a3fd-acde92d075b4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0dd447d5-3d5a-48f5-a7c5-926b18574731" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_1e2a1021-8463-4cf4-a3fd-acde92d075b4" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_LineOfCreditFacilityMaximumBorrowingCapacityBaseAmount_6fc08072-28f8-4642-b746-3830ab06b7dc" xlink:href="amkr-20221231.xsd#amkr_LineOfCreditFacilityMaximumBorrowingCapacityBaseAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0dd447d5-3d5a-48f5-a7c5-926b18574731" xlink:to="loc_amkr_LineOfCreditFacilityMaximumBorrowingCapacityBaseAmount_6fc08072-28f8-4642-b746-3830ab06b7dc" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_LineOfCreditFacilityPercentageOfVariableBorrowings_3a7156a6-89d1-4e70-a59b-293143763450" xlink:href="amkr-20221231.xsd#amkr_LineOfCreditFacilityPercentageOfVariableBorrowings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0dd447d5-3d5a-48f5-a7c5-926b18574731" xlink:to="loc_amkr_LineOfCreditFacilityPercentageOfVariableBorrowings_3a7156a6-89d1-4e70-a59b-293143763450" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_c4a20473-e4ae-49a2-88de-0b004f36a075" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0dd447d5-3d5a-48f5-a7c5-926b18574731" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_c4a20473-e4ae-49a2-88de-0b004f36a075" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_dfbd45fd-0833-43a7-8ceb-bc8f6aef93f4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0dd447d5-3d5a-48f5-a7c5-926b18574731" xlink:to="loc_us-gaap_DebtInstrumentTable_dfbd45fd-0833-43a7-8ceb-bc8f6aef93f4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_021ee568-4c68-4527-979e-5dc6dcb54aa1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_dfbd45fd-0833-43a7-8ceb-bc8f6aef93f4" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_021ee568-4c68-4527-979e-5dc6dcb54aa1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_021ee568-4c68-4527-979e-5dc6dcb54aa1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_021ee568-4c68-4527-979e-5dc6dcb54aa1" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_021ee568-4c68-4527-979e-5dc6dcb54aa1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_218cd0be-12e4-46cb-af56-df700a228c68" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_021ee568-4c68-4527-979e-5dc6dcb54aa1" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_218cd0be-12e4-46cb-af56-df700a228c68" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_ac0a0c71-e4e4-478f-b108-fe45f4caf743" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_218cd0be-12e4-46cb-af56-df700a228c68" xlink:to="loc_us-gaap_SeniorNotesMember_ac0a0c71-e4e4-478f-b108-fe45f4caf743" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_SubsidiaryTermLoansMember_ac664d18-66a7-41bb-bf8f-9d09ccac2f34" xlink:href="amkr-20221231.xsd#amkr_SubsidiaryTermLoansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_218cd0be-12e4-46cb-af56-df700a228c68" xlink:to="loc_amkr_SubsidiaryTermLoansMember_ac664d18-66a7-41bb-bf8f-9d09ccac2f34" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_e68e258e-3909-4aff-8597-bada602694c0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_218cd0be-12e4-46cb-af56-df700a228c68" xlink:to="loc_us-gaap_LineOfCreditMember_e68e258e-3909-4aff-8597-bada602694c0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_59d31fe4-1207-40ec-9924-6150ef6a7cf1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_dfbd45fd-0833-43a7-8ceb-bc8f6aef93f4" xlink:to="loc_us-gaap_DebtInstrumentAxis_59d31fe4-1207-40ec-9924-6150ef6a7cf1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_59d31fe4-1207-40ec-9924-6150ef6a7cf1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_59d31fe4-1207-40ec-9924-6150ef6a7cf1" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_59d31fe4-1207-40ec-9924-6150ef6a7cf1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_ec6ede20-2f66-4529-8d98-4e20e73e6524" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_59d31fe4-1207-40ec-9924-6150ef6a7cf1" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_ec6ede20-2f66-4529-8d98-4e20e73e6524" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_SeniorNotesDueSeptember2027Member_75046337-a9bf-449a-849f-6eae6b2d9a17" xlink:href="amkr-20221231.xsd#amkr_SeniorNotesDueSeptember2027Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_ec6ede20-2f66-4529-8d98-4e20e73e6524" xlink:to="loc_amkr_SeniorNotesDueSeptember2027Member_75046337-a9bf-449a-849f-6eae6b2d9a17" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_TermLoanDueApril2023Member_6abda988-2c2d-482c-93b5-4909ce71e369" xlink:href="amkr-20221231.xsd#amkr_TermLoanDueApril2023Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_ec6ede20-2f66-4529-8d98-4e20e73e6524" xlink:to="loc_amkr_TermLoanDueApril2023Member_6abda988-2c2d-482c-93b5-4909ce71e369" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_TermLoanFixedRateAt185DueApril2024Member_8a4d8499-e94e-43e5-8657-c6dceaf7603f" xlink:href="amkr-20221231.xsd#amkr_TermLoanFixedRateAt185DueApril2024Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_ec6ede20-2f66-4529-8d98-4e20e73e6524" xlink:to="loc_amkr_TermLoanFixedRateAt185DueApril2024Member_8a4d8499-e94e-43e5-8657-c6dceaf7603f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_TermLoanDueDecember2028Member_09b0e88c-9a0a-4876-b9be-fc71170729d0" xlink:href="amkr-20221231.xsd#amkr_TermLoanDueDecember2028Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_ec6ede20-2f66-4529-8d98-4e20e73e6524" xlink:to="loc_amkr_TermLoanDueDecember2028Member_09b0e88c-9a0a-4876-b9be-fc71170729d0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_TermLoanFixedRateAt212DueDecember2028Member_f8072ff1-34b3-409c-91b7-5a654fb2c20a" xlink:href="amkr-20221231.xsd#amkr_TermLoanFixedRateAt212DueDecember2028Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_ec6ede20-2f66-4529-8d98-4e20e73e6524" xlink:to="loc_amkr_TermLoanFixedRateAt212DueDecember2028Member_f8072ff1-34b3-409c-91b7-5a654fb2c20a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_ShorttermtermloanvariablerateMember_7ff49117-4ed5-4700-a528-b21dea292b96" xlink:href="amkr-20221231.xsd#amkr_ShorttermtermloanvariablerateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_ec6ede20-2f66-4529-8d98-4e20e73e6524" xlink:to="loc_amkr_ShorttermtermloanvariablerateMember_7ff49117-4ed5-4700-a528-b21dea292b96" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_TermLoanDueJune2022Member_fa85b237-ed85-4db9-89db-1c3d82852a1f" xlink:href="amkr-20221231.xsd#amkr_TermLoanDueJune2022Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_ec6ede20-2f66-4529-8d98-4e20e73e6524" xlink:to="loc_amkr_TermLoanDueJune2022Member_fa85b237-ed85-4db9-89db-1c3d82852a1f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_TermLoanFixedRateat0.60DueJuly2022Member_28a64f68-2eaf-4ca4-8792-b6701f31dc77" xlink:href="amkr-20221231.xsd#amkr_TermLoanFixedRateat0.60DueJuly2022Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_ec6ede20-2f66-4529-8d98-4e20e73e6524" xlink:to="loc_amkr_TermLoanFixedRateat0.60DueJuly2022Member_28a64f68-2eaf-4ca4-8792-b6701f31dc77" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_TermLoanFixedRateat1.30DueJuly2023Member_a5c18cdd-2f84-41f5-ad8e-51eb65185c61" xlink:href="amkr-20221231.xsd#amkr_TermLoanFixedRateat1.30DueJuly2023Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_ec6ede20-2f66-4529-8d98-4e20e73e6524" xlink:to="loc_amkr_TermLoanFixedRateat1.30DueJuly2023Member_a5c18cdd-2f84-41f5-ad8e-51eb65185c61" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_TermLoanFixedRateat1.35DueDecember2024Member_c0db2168-bc3a-4dc1-a69e-8d9a75e9ee15" xlink:href="amkr-20221231.xsd#amkr_TermLoanFixedRateat1.35DueDecember2024Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_ec6ede20-2f66-4529-8d98-4e20e73e6524" xlink:to="loc_amkr_TermLoanFixedRateat1.35DueDecember2024Member_c0db2168-bc3a-4dc1-a69e-8d9a75e9ee15" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_TermLoanFixedRateAt120DueDecember2025Member_ad81d9fe-b829-4f16-b806-b7c83365e41b" xlink:href="amkr-20221231.xsd#amkr_TermLoanFixedRateAt120DueDecember2025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_ec6ede20-2f66-4529-8d98-4e20e73e6524" xlink:to="loc_amkr_TermLoanFixedRateAt120DueDecember2025Member_ad81d9fe-b829-4f16-b806-b7c83365e41b" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_TermLoanFixedRateAt123DueDecember2026Member_dfef04d4-5e48-4719-9732-eb2c58bc3869" xlink:href="amkr-20221231.xsd#amkr_TermLoanFixedRateAt123DueDecember2026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_ec6ede20-2f66-4529-8d98-4e20e73e6524" xlink:to="loc_amkr_TermLoanFixedRateAt123DueDecember2026Member_dfef04d4-5e48-4719-9732-eb2c58bc3869" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_TermLoanFixedRateAt159DueDecember2027Member_50255d25-1972-4327-915c-f239bebaeced" xlink:href="amkr-20221231.xsd#amkr_TermLoanFixedRateAt159DueDecember2027Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_ec6ede20-2f66-4529-8d98-4e20e73e6524" xlink:to="loc_amkr_TermLoanFixedRateAt159DueDecember2027Member_50255d25-1972-4327-915c-f239bebaeced" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_TermLoanLIBORPlus110DueMarch2024Member_3d7f237f-0e46-4188-9aec-2ec2b8b2216c" xlink:href="amkr-20221231.xsd#amkr_TermLoanLIBORPlus110DueMarch2024Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_ec6ede20-2f66-4529-8d98-4e20e73e6524" xlink:to="loc_amkr_TermLoanLIBORPlus110DueMarch2024Member_3d7f237f-0e46-4188-9aec-2ec2b8b2216c" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_TermLoanLIBORPlus080DueJune2025Member_6eeecbff-2436-426b-86f8-02317ce4e9a1" xlink:href="amkr-20221231.xsd#amkr_TermLoanLIBORPlus080DueJune2025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_ec6ede20-2f66-4529-8d98-4e20e73e6524" xlink:to="loc_amkr_TermLoanLIBORPlus080DueJune2025Member_6eeecbff-2436-426b-86f8-02317ce4e9a1" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_TermLoanLIBORPlus080DueJune2025OneAndTwoMember_3d1028a6-7f7c-44a9-8f9a-a9f7e327de01" xlink:href="amkr-20221231.xsd#amkr_TermLoanLIBORPlus080DueJune2025OneAndTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_amkr_TermLoanLIBORPlus080DueJune2025Member_6eeecbff-2436-426b-86f8-02317ce4e9a1" xlink:to="loc_amkr_TermLoanLIBORPlus080DueJune2025OneAndTwoMember_3d1028a6-7f7c-44a9-8f9a-a9f7e327de01" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_TermLoanLIBORPlus075Due2025Member_22eb6740-d8c5-45fd-ad86-b81a3f1103aa" xlink:href="amkr-20221231.xsd#amkr_TermLoanLIBORPlus075Due2025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_ec6ede20-2f66-4529-8d98-4e20e73e6524" xlink:to="loc_amkr_TermLoanLIBORPlus075Due2025Member_22eb6740-d8c5-45fd-ad86-b81a3f1103aa" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_TermLoanLIBORPlus075Due2025OneAndTwoMember_c2bbb70c-af45-4b97-b230-fa4b8a40387e" xlink:href="amkr-20221231.xsd#amkr_TermLoanLIBORPlus075Due2025OneAndTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_amkr_TermLoanLIBORPlus075Due2025Member_22eb6740-d8c5-45fd-ad86-b81a3f1103aa" xlink:to="loc_amkr_TermLoanLIBORPlus075Due2025OneAndTwoMember_c2bbb70c-af45-4b97-b230-fa4b8a40387e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_RevolvingCreditFacilityDueDecember2024Member_c7cd88d0-df5e-47e8-8d87-6665b827fbeb" xlink:href="amkr-20221231.xsd#amkr_RevolvingCreditFacilityDueDecember2024Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_ec6ede20-2f66-4529-8d98-4e20e73e6524" xlink:to="loc_amkr_RevolvingCreditFacilityDueDecember2024Member_c7cd88d0-df5e-47e8-8d87-6665b827fbeb" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_SeniorSecuredRevolvingCreditFacilityDueMarch2027Member_ee9e3111-dd92-4186-8f10-a3acac332d7e" xlink:href="amkr-20221231.xsd#amkr_SeniorSecuredRevolvingCreditFacilityDueMarch2027Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_ec6ede20-2f66-4529-8d98-4e20e73e6524" xlink:to="loc_amkr_SeniorSecuredRevolvingCreditFacilityDueMarch2027Member_ee9e3111-dd92-4186-8f10-a3acac332d7e" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_SeniorSecuredRevolvingCreditFacilitydueJuly2023Member_66f80b3d-9289-4e74-90b1-5e163edecc7b" xlink:href="amkr-20221231.xsd#amkr_SeniorSecuredRevolvingCreditFacilitydueJuly2023Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_ec6ede20-2f66-4529-8d98-4e20e73e6524" xlink:to="loc_amkr_SeniorSecuredRevolvingCreditFacilitydueJuly2023Member_66f80b3d-9289-4e74-90b1-5e163edecc7b" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_A2022SingaporeRevolverMember_f3a4731e-5279-4d3a-8845-5a4d1e452c5b" xlink:href="amkr-20221231.xsd#amkr_A2022SingaporeRevolverMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_ec6ede20-2f66-4529-8d98-4e20e73e6524" xlink:to="loc_amkr_A2022SingaporeRevolverMember_f3a4731e-5279-4d3a-8845-5a4d1e452c5b" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_86aba89e-9d8c-4ce9-a511-ce8f3662b56a" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_dfbd45fd-0833-43a7-8ceb-bc8f6aef93f4" xlink:to="loc_srt_StatementGeographicalAxis_86aba89e-9d8c-4ce9-a511-ce8f3662b56a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_86aba89e-9d8c-4ce9-a511-ce8f3662b56a_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_86aba89e-9d8c-4ce9-a511-ce8f3662b56a" xlink:to="loc_srt_SegmentGeographicalDomain_86aba89e-9d8c-4ce9-a511-ce8f3662b56a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_0848d453-e6bd-41a6-8696-47fc2281b5f9" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_86aba89e-9d8c-4ce9-a511-ce8f3662b56a" xlink:to="loc_srt_SegmentGeographicalDomain_0848d453-e6bd-41a6-8696-47fc2281b5f9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_KR_984f78f7-9d00-4928-8d2a-3146136876d3" xlink:href="https://xbrl.sec.gov/country/2022/country-2022.xsd#country_KR"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_0848d453-e6bd-41a6-8696-47fc2281b5f9" xlink:to="loc_country_KR_984f78f7-9d00-4928-8d2a-3146136876d3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_JP_cd5fbaa3-84f0-4b0c-848e-1819f9d39e54" xlink:href="https://xbrl.sec.gov/country/2022/country-2022.xsd#country_JP"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_0848d453-e6bd-41a6-8696-47fc2281b5f9" xlink:to="loc_country_JP_cd5fbaa3-84f0-4b0c-848e-1819f9d39e54" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_CN_32dafbe3-ea81-4ce0-8dd0-6a00aa57ed9e" xlink:href="https://xbrl.sec.gov/country/2022/country-2022.xsd#country_CN"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_0848d453-e6bd-41a6-8696-47fc2281b5f9" xlink:to="loc_country_CN_32dafbe3-ea81-4ce0-8dd0-6a00aa57ed9e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_TW_a8f327dd-7a5b-4e66-b73a-5935ecd511e9" xlink:href="https://xbrl.sec.gov/country/2022/country-2022.xsd#country_TW"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_0848d453-e6bd-41a6-8696-47fc2281b5f9" xlink:to="loc_country_TW_a8f327dd-7a5b-4e66-b73a-5935ecd511e9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_SG_f212c0fc-cfff-4ba7-8536-8ae5b3e781ec" xlink:href="https://xbrl.sec.gov/country/2022/country-2022.xsd#country_SG"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_0848d453-e6bd-41a6-8696-47fc2281b5f9" xlink:to="loc_country_SG_f212c0fc-cfff-4ba7-8536-8ae5b3e781ec" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateAxis_1edf335c-8465-48bb-ad45-95f00557dc6f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_VariableRateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_dfbd45fd-0833-43a7-8ceb-bc8f6aef93f4" xlink:to="loc_us-gaap_VariableRateAxis_1edf335c-8465-48bb-ad45-95f00557dc6f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_1edf335c-8465-48bb-ad45-95f00557dc6f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_1edf335c-8465-48bb-ad45-95f00557dc6f" xlink:to="loc_us-gaap_VariableRateDomain_1edf335c-8465-48bb-ad45-95f00557dc6f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_9b0969e5-972a-4504-bb5d-803152a347f4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_1edf335c-8465-48bb-ad45-95f00557dc6f" xlink:to="loc_us-gaap_VariableRateDomain_9b0969e5-972a-4504-bb5d-803152a347f4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_ApplicableBankRateMember_658fcf55-7422-434b-a939-76cf5cda88ae" xlink:href="amkr-20221231.xsd#amkr_ApplicableBankRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_9b0969e5-972a-4504-bb5d-803152a347f4" xlink:to="loc_amkr_ApplicableBankRateMember_658fcf55-7422-434b-a939-76cf5cda88ae" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LondonInterbankOfferedRateLIBORMember_f0897e05-605b-4da3-b505-8761b7824baa" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LondonInterbankOfferedRateLIBORMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_9b0969e5-972a-4504-bb5d-803152a347f4" xlink:to="loc_us-gaap_LondonInterbankOfferedRateLIBORMember_f0897e05-605b-4da3-b505-8761b7824baa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_35ba897c-0508-4aa1-aa38-14efa0e48e22" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_dfbd45fd-0833-43a7-8ceb-bc8f6aef93f4" xlink:to="loc_us-gaap_CreditFacilityAxis_35ba897c-0508-4aa1-aa38-14efa0e48e22" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_35ba897c-0508-4aa1-aa38-14efa0e48e22_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_35ba897c-0508-4aa1-aa38-14efa0e48e22" xlink:to="loc_us-gaap_CreditFacilityDomain_35ba897c-0508-4aa1-aa38-14efa0e48e22_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_548a7976-fbad-45da-a6f0-ff8f9b0b7343" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_35ba897c-0508-4aa1-aa38-14efa0e48e22" xlink:to="loc_us-gaap_CreditFacilityDomain_548a7976-fbad-45da-a6f0-ff8f9b0b7343" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_c716ff14-d089-4cbf-b8f8-3d70419b0089" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_548a7976-fbad-45da-a6f0-ff8f9b0b7343" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_c716ff14-d089-4cbf-b8f8-3d70419b0089" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtTypeAxis_5ceaf171-5649-4cbf-9c0d-1018031e0a12" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShortTermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_dfbd45fd-0833-43a7-8ceb-bc8f6aef93f4" xlink:to="loc_us-gaap_ShortTermDebtTypeAxis_5ceaf171-5649-4cbf-9c0d-1018031e0a12" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtTypeDomain_5ceaf171-5649-4cbf-9c0d-1018031e0a12_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShortTermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ShortTermDebtTypeAxis_5ceaf171-5649-4cbf-9c0d-1018031e0a12" xlink:to="loc_us-gaap_ShortTermDebtTypeDomain_5ceaf171-5649-4cbf-9c0d-1018031e0a12_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtTypeDomain_f7a1f7f3-462d-4fdd-8e83-7e4ce374efc1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShortTermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ShortTermDebtTypeAxis_5ceaf171-5649-4cbf-9c0d-1018031e0a12" xlink:to="loc_us-gaap_ShortTermDebtTypeDomain_f7a1f7f3-462d-4fdd-8e83-7e4ce374efc1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_SubsidiaryTermLoansMember_7c55f15c-7a1c-470a-94b5-c528ec20b664" xlink:href="amkr-20221231.xsd#amkr_SubsidiaryTermLoansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtTypeDomain_f7a1f7f3-462d-4fdd-8e83-7e4ce374efc1" xlink:to="loc_amkr_SubsidiaryTermLoansMember_7c55f15c-7a1c-470a-94b5-c528ec20b664" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.amkor.com/role/DebtNarrativeDetails" xlink:type="simple" xlink:href="amkr-20221231.xsd#DebtNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.amkor.com/role/DebtNarrativeDetails" xlink:type="extended" id="ic6c7a7a4bc6f42dbb885ffad74003e04_DebtNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_7c12ad1c-1cb0-45f8-9d80-e0ada29d1b75" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCollateralAmount_818b81aa-43f4-4060-b8f0-c4dd18e6137d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentCollateralAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7c12ad1c-1cb0-45f8-9d80-e0ada29d1b75" xlink:to="loc_us-gaap_DebtInstrumentCollateralAmount_818b81aa-43f4-4060-b8f0-c4dd18e6137d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_c62d900f-e266-40b2-8975-57e37d77ad96" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7c12ad1c-1cb0-45f8-9d80-e0ada29d1b75" xlink:to="loc_us-gaap_DebtInstrumentTable_c62d900f-e266-40b2-8975-57e37d77ad96" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PledgedStatusAxis_5197ffd2-376e-4864-a4f1-6a634ca6cb33" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PledgedStatusAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_c62d900f-e266-40b2-8975-57e37d77ad96" xlink:to="loc_us-gaap_PledgedStatusAxis_5197ffd2-376e-4864-a4f1-6a634ca6cb33" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PledgedStatusDomain_5197ffd2-376e-4864-a4f1-6a634ca6cb33_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PledgedStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PledgedStatusAxis_5197ffd2-376e-4864-a4f1-6a634ca6cb33" xlink:to="loc_us-gaap_PledgedStatusDomain_5197ffd2-376e-4864-a4f1-6a634ca6cb33_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PledgedStatusDomain_1e34c663-61e3-4bd2-9153-cdbcb7ecf87c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PledgedStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PledgedStatusAxis_5197ffd2-376e-4864-a4f1-6a634ca6cb33" xlink:to="loc_us-gaap_PledgedStatusDomain_1e34c663-61e3-4bd2-9153-cdbcb7ecf87c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetPledgedAsCollateralMember_fb749282-836c-4996-97b8-1a75b2315224" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetPledgedAsCollateralMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PledgedStatusDomain_1e34c663-61e3-4bd2-9153-cdbcb7ecf87c" xlink:to="loc_us-gaap_AssetPledgedAsCollateralMember_fb749282-836c-4996-97b8-1a75b2315224" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.amkor.com/role/DebtInterestRatesDetails" xlink:type="simple" xlink:href="amkr-20221231.xsd#DebtInterestRatesDetails"/>
  <link:definitionLink xlink:role="http://www.amkor.com/role/DebtInterestRatesDetails" xlink:type="extended" id="i7f4186629e9c4d7aa81eaa5febc4d6c2_DebtInterestRatesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_6b2703e0-915b-42dc-85b9-59ff6689d3f5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_48d37dc7-de1b-42c6-b4ca-c006ff83e428" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_6b2703e0-915b-42dc-85b9-59ff6689d3f5" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_48d37dc7-de1b-42c6-b4ca-c006ff83e428" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_5894b3da-7eb0-4fd8-ba19-9642bf1726ad" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentInterestRateEffectivePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_6b2703e0-915b-42dc-85b9-59ff6689d3f5" xlink:to="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_5894b3da-7eb0-4fd8-ba19-9642bf1726ad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_5acd66df-3179-42f4-b8ac-370a0d16de6d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_6b2703e0-915b-42dc-85b9-59ff6689d3f5" xlink:to="loc_us-gaap_DebtInstrumentTable_5acd66df-3179-42f4-b8ac-370a0d16de6d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_78896912-f0ce-4356-b4a0-51df6c249e14" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_5acd66df-3179-42f4-b8ac-370a0d16de6d" xlink:to="loc_srt_StatementGeographicalAxis_78896912-f0ce-4356-b4a0-51df6c249e14" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_78896912-f0ce-4356-b4a0-51df6c249e14_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_78896912-f0ce-4356-b4a0-51df6c249e14" xlink:to="loc_srt_SegmentGeographicalDomain_78896912-f0ce-4356-b4a0-51df6c249e14_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_de7a0605-3c07-41d3-bd5c-a8d0cc89a358" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_78896912-f0ce-4356-b4a0-51df6c249e14" xlink:to="loc_srt_SegmentGeographicalDomain_de7a0605-3c07-41d3-bd5c-a8d0cc89a358" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_KR_3229ca23-d742-4b5d-a1a9-10c410007915" xlink:href="https://xbrl.sec.gov/country/2022/country-2022.xsd#country_KR"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_de7a0605-3c07-41d3-bd5c-a8d0cc89a358" xlink:to="loc_country_KR_3229ca23-d742-4b5d-a1a9-10c410007915" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_JP_278132e8-3a2b-4468-a18d-e4b07d02aecc" xlink:href="https://xbrl.sec.gov/country/2022/country-2022.xsd#country_JP"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_de7a0605-3c07-41d3-bd5c-a8d0cc89a358" xlink:to="loc_country_JP_278132e8-3a2b-4468-a18d-e4b07d02aecc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_CN_825f57a7-ede0-4fe0-9e70-d5647ed7239d" xlink:href="https://xbrl.sec.gov/country/2022/country-2022.xsd#country_CN"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_de7a0605-3c07-41d3-bd5c-a8d0cc89a358" xlink:to="loc_country_CN_825f57a7-ede0-4fe0-9e70-d5647ed7239d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_16c68f26-46ba-4536-8c09-9bc6eb89b818" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_5acd66df-3179-42f4-b8ac-370a0d16de6d" xlink:to="loc_us-gaap_DebtInstrumentAxis_16c68f26-46ba-4536-8c09-9bc6eb89b818" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_16c68f26-46ba-4536-8c09-9bc6eb89b818_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_16c68f26-46ba-4536-8c09-9bc6eb89b818" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_16c68f26-46ba-4536-8c09-9bc6eb89b818_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_91b9c68f-ca70-4179-9af2-a4099b1c7d91" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_16c68f26-46ba-4536-8c09-9bc6eb89b818" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_91b9c68f-ca70-4179-9af2-a4099b1c7d91" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_TermLoanDueApril2023Member_0685b86c-f620-4891-b1b0-82ff371e36dc" xlink:href="amkr-20221231.xsd#amkr_TermLoanDueApril2023Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_91b9c68f-ca70-4179-9af2-a4099b1c7d91" xlink:to="loc_amkr_TermLoanDueApril2023Member_0685b86c-f620-4891-b1b0-82ff371e36dc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_ShorttermtermloanvariablerateMember_38b3fee3-900a-4069-86f1-9ed24d655ac2" xlink:href="amkr-20221231.xsd#amkr_ShorttermtermloanvariablerateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_91b9c68f-ca70-4179-9af2-a4099b1c7d91" xlink:to="loc_amkr_ShorttermtermloanvariablerateMember_38b3fee3-900a-4069-86f1-9ed24d655ac2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_TermLoanLIBORPlus110DueMarch2024Member_a103b5bb-fe36-4fbb-b5ba-fa93e49b4300" xlink:href="amkr-20221231.xsd#amkr_TermLoanLIBORPlus110DueMarch2024Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_91b9c68f-ca70-4179-9af2-a4099b1c7d91" xlink:to="loc_amkr_TermLoanLIBORPlus110DueMarch2024Member_a103b5bb-fe36-4fbb-b5ba-fa93e49b4300" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_TermLoansLIBORPlus080DueJune2025Member_51d46206-5a42-4743-bfc6-dc4596a00fd2" xlink:href="amkr-20221231.xsd#amkr_TermLoansLIBORPlus080DueJune2025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_91b9c68f-ca70-4179-9af2-a4099b1c7d91" xlink:to="loc_amkr_TermLoansLIBORPlus080DueJune2025Member_51d46206-5a42-4743-bfc6-dc4596a00fd2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_TermLoansLIBORPlus075Due2025Member_606b461a-95e9-4ef5-90f1-81d27af0222d" xlink:href="amkr-20221231.xsd#amkr_TermLoansLIBORPlus075Due2025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_91b9c68f-ca70-4179-9af2-a4099b1c7d91" xlink:to="loc_amkr_TermLoansLIBORPlus075Due2025Member_606b461a-95e9-4ef5-90f1-81d27af0222d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_c465245e-5aed-4ebc-97f8-fa36d3e72d59" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_5acd66df-3179-42f4-b8ac-370a0d16de6d" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_c465245e-5aed-4ebc-97f8-fa36d3e72d59" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_c465245e-5aed-4ebc-97f8-fa36d3e72d59_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_c465245e-5aed-4ebc-97f8-fa36d3e72d59" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_c465245e-5aed-4ebc-97f8-fa36d3e72d59_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_8a5290f5-fa19-4cb9-9adb-01efb37bc0eb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_c465245e-5aed-4ebc-97f8-fa36d3e72d59" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_8a5290f5-fa19-4cb9-9adb-01efb37bc0eb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_SubsidiaryTermLoansMember_4f7f72a7-54b3-47f8-8d0f-54d2c18f5c9e" xlink:href="amkr-20221231.xsd#amkr_SubsidiaryTermLoansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_8a5290f5-fa19-4cb9-9adb-01efb37bc0eb" xlink:to="loc_amkr_SubsidiaryTermLoansMember_4f7f72a7-54b3-47f8-8d0f-54d2c18f5c9e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateAxis_988ec306-1f87-4e6a-ae4e-596ab24e2f9d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_VariableRateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_5acd66df-3179-42f4-b8ac-370a0d16de6d" xlink:to="loc_us-gaap_VariableRateAxis_988ec306-1f87-4e6a-ae4e-596ab24e2f9d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_988ec306-1f87-4e6a-ae4e-596ab24e2f9d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_988ec306-1f87-4e6a-ae4e-596ab24e2f9d" xlink:to="loc_us-gaap_VariableRateDomain_988ec306-1f87-4e6a-ae4e-596ab24e2f9d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_6dab8b70-0fe1-4bf0-911e-179f72e9c05a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_988ec306-1f87-4e6a-ae4e-596ab24e2f9d" xlink:to="loc_us-gaap_VariableRateDomain_6dab8b70-0fe1-4bf0-911e-179f72e9c05a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_ApplicableBankRateMember_3046690b-d1f9-4400-bb0e-2539774d6c94" xlink:href="amkr-20221231.xsd#amkr_ApplicableBankRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_6dab8b70-0fe1-4bf0-911e-179f72e9c05a" xlink:to="loc_amkr_ApplicableBankRateMember_3046690b-d1f9-4400-bb0e-2539774d6c94" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LondonInterbankOfferedRateLIBORMember_0877aaff-9af6-4c2d-95dc-ef72cd562e64" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LondonInterbankOfferedRateLIBORMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_6dab8b70-0fe1-4bf0-911e-179f72e9c05a" xlink:to="loc_us-gaap_LondonInterbankOfferedRateLIBORMember_0877aaff-9af6-4c2d-95dc-ef72cd562e64" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtTypeAxis_8410ce35-7b7e-476b-8368-d9526facf4cc" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShortTermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_5acd66df-3179-42f4-b8ac-370a0d16de6d" xlink:to="loc_us-gaap_ShortTermDebtTypeAxis_8410ce35-7b7e-476b-8368-d9526facf4cc" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtTypeDomain_8410ce35-7b7e-476b-8368-d9526facf4cc_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShortTermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ShortTermDebtTypeAxis_8410ce35-7b7e-476b-8368-d9526facf4cc" xlink:to="loc_us-gaap_ShortTermDebtTypeDomain_8410ce35-7b7e-476b-8368-d9526facf4cc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtTypeDomain_8e526db4-7147-4707-935e-f8311ee26196" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShortTermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ShortTermDebtTypeAxis_8410ce35-7b7e-476b-8368-d9526facf4cc" xlink:to="loc_us-gaap_ShortTermDebtTypeDomain_8e526db4-7147-4707-935e-f8311ee26196" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_SubsidiaryTermLoansMember_d50016e5-92bb-4662-9895-196e00357cf2" xlink:href="amkr-20221231.xsd#amkr_SubsidiaryTermLoansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtTypeDomain_8e526db4-7147-4707-935e-f8311ee26196" xlink:to="loc_amkr_SubsidiaryTermLoansMember_d50016e5-92bb-4662-9895-196e00357cf2" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.amkor.com/role/PensionandSeverancePlansKoreanSeverancePlanDetails" xlink:type="simple" xlink:href="amkr-20221231.xsd#PensionandSeverancePlansKoreanSeverancePlanDetails"/>
  <link:definitionLink xlink:role="http://www.amkor.com/role/PensionandSeverancePlansKoreanSeverancePlanDetails" xlink:type="extended" id="i7ad99ca133e34214821d83033f8faba5_PensionandSeverancePlansKoreanSeverancePlanDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_8ecb2b14-d32d-450e-b036-65a17bb46a66" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestructuringCostAndReserveLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_DeferredCompensationLiabilityCurrentAndNoncurrentRollForward_4e777981-31ad-4273-a61e-8a2a4e18849a" xlink:href="amkr-20221231.xsd#amkr_DeferredCompensationLiabilityCurrentAndNoncurrentRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_8ecb2b14-d32d-450e-b036-65a17bb46a66" xlink:to="loc_amkr_DeferredCompensationLiabilityCurrentAndNoncurrentRollForward_4e777981-31ad-4273-a61e-8a2a4e18849a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationCashbasedArrangementsLiabilityCurrentAndNoncurrent_232fab4d-2158-4017-966e-586cde92c2d7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DeferredCompensationCashbasedArrangementsLiabilityCurrentAndNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_amkr_DeferredCompensationLiabilityCurrentAndNoncurrentRollForward_4e777981-31ad-4273-a61e-8a2a4e18849a" xlink:to="loc_us-gaap_DeferredCompensationCashbasedArrangementsLiabilityCurrentAndNoncurrent_232fab4d-2158-4017-966e-586cde92c2d7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_ProvisionOfSeveranceBenefits_fed05300-09d7-4dd0-9b52-cae5b0ee8dc0" xlink:href="amkr-20221231.xsd#amkr_ProvisionOfSeveranceBenefits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_amkr_DeferredCompensationLiabilityCurrentAndNoncurrentRollForward_4e777981-31ad-4273-a61e-8a2a4e18849a" xlink:to="loc_amkr_ProvisionOfSeveranceBenefits_fed05300-09d7-4dd0-9b52-cae5b0ee8dc0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_PaymentsForEmployeeSeverance_0656136a-2f78-482d-83f7-d55ed30dfbc7" xlink:href="amkr-20221231.xsd#amkr_PaymentsForEmployeeSeverance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_amkr_DeferredCompensationLiabilityCurrentAndNoncurrentRollForward_4e777981-31ad-4273-a61e-8a2a4e18849a" xlink:to="loc_amkr_PaymentsForEmployeeSeverance_0656136a-2f78-482d-83f7-d55ed30dfbc7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_SeveranceBenefitsGainLossTranslationAdjustments_2ab4757b-c883-4fce-85a0-5a6f2a9d3a14" xlink:href="amkr-20221231.xsd#amkr_SeveranceBenefitsGainLossTranslationAdjustments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_amkr_DeferredCompensationLiabilityCurrentAndNoncurrentRollForward_4e777981-31ad-4273-a61e-8a2a4e18849a" xlink:to="loc_amkr_SeveranceBenefitsGainLossTranslationAdjustments_2ab4757b-c883-4fce-85a0-5a6f2a9d3a14" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationCashbasedArrangementsLiabilityCurrentAndNoncurrent_a42fb5e1-8cea-45e1-9575-0e3bd2e1ba39" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DeferredCompensationCashbasedArrangementsLiabilityCurrentAndNoncurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_PaymentsRemainingWithLocalPensionFund_ee318de1-ba73-44f9-9bbd-c775a0738535" xlink:href="amkr-20221231.xsd#amkr_PaymentsRemainingWithLocalPensionFund"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_8ecb2b14-d32d-450e-b036-65a17bb46a66" xlink:to="loc_amkr_PaymentsRemainingWithLocalPensionFund_ee318de1-ba73-44f9-9bbd-c775a0738535" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PostemploymentBenefitsLiabilityCurrentAndNoncurrent_6c100584-c726-450c-a9ce-09b54286ca4b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PostemploymentBenefitsLiabilityCurrentAndNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_8ecb2b14-d32d-450e-b036-65a17bb46a66" xlink:to="loc_us-gaap_PostemploymentBenefitsLiabilityCurrentAndNoncurrent_6c100584-c726-450c-a9ce-09b54286ca4b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PostemploymentBenefitsLiabilityCurrent_7866f5d3-4326-4b81-b2ce-311c7e539627" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PostemploymentBenefitsLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_8ecb2b14-d32d-450e-b036-65a17bb46a66" xlink:to="loc_us-gaap_PostemploymentBenefitsLiabilityCurrent_7866f5d3-4326-4b81-b2ce-311c7e539627" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PostemploymentBenefitsLiabilityNoncurrent_a7fac1a0-fb2b-46d4-8657-4db60ee93c74" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PostemploymentBenefitsLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_8ecb2b14-d32d-450e-b036-65a17bb46a66" xlink:to="loc_us-gaap_PostemploymentBenefitsLiabilityNoncurrent_a7fac1a0-fb2b-46d4-8657-4db60ee93c74" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAndByTypeOfDeferredCompensationTable_aa75fd91-2fe6-4b23-9f83-8dcc03719307" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfDeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAndByTypeOfDeferredCompensationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_8ecb2b14-d32d-450e-b036-65a17bb46a66" xlink:to="loc_us-gaap_ScheduleOfDeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAndByTypeOfDeferredCompensationTable_aa75fd91-2fe6-4b23-9f83-8dcc03719307" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_OtherDeferredCashCompensationAxis_0221a1f9-630f-450a-9f11-e0a354d18ffd" xlink:href="amkr-20221231.xsd#amkr_OtherDeferredCashCompensationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAndByTypeOfDeferredCompensationTable_aa75fd91-2fe6-4b23-9f83-8dcc03719307" xlink:to="loc_amkr_OtherDeferredCashCompensationAxis_0221a1f9-630f-450a-9f11-e0a354d18ffd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_OtherDeferredCashCompensationDomain_0221a1f9-630f-450a-9f11-e0a354d18ffd_default" xlink:href="amkr-20221231.xsd#amkr_OtherDeferredCashCompensationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_amkr_OtherDeferredCashCompensationAxis_0221a1f9-630f-450a-9f11-e0a354d18ffd" xlink:to="loc_amkr_OtherDeferredCashCompensationDomain_0221a1f9-630f-450a-9f11-e0a354d18ffd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_OtherDeferredCashCompensationDomain_dbf047e5-94d6-4525-93d9-c6aafe099868" xlink:href="amkr-20221231.xsd#amkr_OtherDeferredCashCompensationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_amkr_OtherDeferredCashCompensationAxis_0221a1f9-630f-450a-9f11-e0a354d18ffd" xlink:to="loc_amkr_OtherDeferredCashCompensationDomain_dbf047e5-94d6-4525-93d9-c6aafe099868" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_KoreanSeverancePlanMember_c816a47b-af27-4756-a979-a62e51417079" xlink:href="amkr-20221231.xsd#amkr_KoreanSeverancePlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_amkr_OtherDeferredCashCompensationDomain_dbf047e5-94d6-4525-93d9-c6aafe099868" xlink:to="loc_amkr_KoreanSeverancePlanMember_c816a47b-af27-4756-a979-a62e51417079" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.amkor.com/role/PensionandSeverancePlansImpactonAccumulatedOtherComprehensiveIncomeDetails" xlink:type="simple" xlink:href="amkr-20221231.xsd#PensionandSeverancePlansImpactonAccumulatedOtherComprehensiveIncomeDetails"/>
  <link:definitionLink xlink:role="http://www.amkor.com/role/PensionandSeverancePlansImpactonAccumulatedOtherComprehensiveIncomeDetails" xlink:type="extended" id="i4e93d4fca50845439ee0d5d8cb57d828_PensionandSeverancePlansImpactonAccumulatedOtherComprehensiveIncomeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_ccb39dc2-8cf0-4568-8c0f-455cc60c6463" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_ef9b436f-522f-41da-9b63-889c2ed4bee7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_ccb39dc2-8cf0-4568-8c0f-455cc60c6463" xlink:to="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_ef9b436f-522f-41da-9b63-889c2ed4bee7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_5d53c6d6-9912-4621-8190-e17660ad7008" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_ef9b436f-522f-41da-9b63-889c2ed4bee7" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_5d53c6d6-9912-4621-8190-e17660ad7008" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_18ca3e35-2c48-4787-9ca2-f9ce4ee943ad" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_ef9b436f-522f-41da-9b63-889c2ed4bee7" xlink:to="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_18ca3e35-2c48-4787-9ca2-f9ce4ee943ad" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_b68c1bea-ce07-4c6a-be62-f741847b4dcb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_ef9b436f-522f-41da-9b63-889c2ed4bee7" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_b68c1bea-ce07-4c6a-be62-f741847b4dcb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_f7e6a5a9-88bd-4181-8197-a38a80ba4821" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_ef9b436f-522f-41da-9b63-889c2ed4bee7" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_f7e6a5a9-88bd-4181-8197-a38a80ba4821" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_b9714ea2-cbd5-4f69-b9e8-b650e9ee1a73" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_7903b68c-f816-4d26-aa70-8f294b9a085e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_ccb39dc2-8cf0-4568-8c0f-455cc60c6463" xlink:to="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_7903b68c-f816-4d26-aa70-8f294b9a085e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_a719dc68-31e7-44b9-9a84-5afbd97572c1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_7903b68c-f816-4d26-aa70-8f294b9a085e" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_a719dc68-31e7-44b9-9a84-5afbd97572c1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_a719dc68-31e7-44b9-9a84-5afbd97572c1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_a719dc68-31e7-44b9-9a84-5afbd97572c1" xlink:to="loc_us-gaap_EquityComponentDomain_a719dc68-31e7-44b9-9a84-5afbd97572c1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_656d7f7e-dc56-4f54-938c-e90265aeebb9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_a719dc68-31e7-44b9-9a84-5afbd97572c1" xlink:to="loc_us-gaap_EquityComponentDomain_656d7f7e-dc56-4f54-938c-e90265aeebb9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceIncludingPortionAttributableToNoncontrollingInterestMember_dbe7bf6e-3aae-48e4-ac54-e0915711dc75" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceIncludingPortionAttributableToNoncontrollingInterestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_656d7f7e-dc56-4f54-938c-e90265aeebb9" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceIncludingPortionAttributableToNoncontrollingInterestMember_dbe7bf6e-3aae-48e4-ac54-e0915711dc75" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetGainLossIncludingPortionAttributableToNoncontrollingInterestMember_7e2cfde7-b544-49dd-990d-9cab3e0258c2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetGainLossIncludingPortionAttributableToNoncontrollingInterestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_656d7f7e-dc56-4f54-938c-e90265aeebb9" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetGainLossIncludingPortionAttributableToNoncontrollingInterestMember_7e2cfde7-b544-49dd-990d-9cab3e0258c2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember_c300a68a-e42f-4be2-82d3-40b2dd359a7b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_656d7f7e-dc56-4f54-938c-e90265aeebb9" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember_c300a68a-e42f-4be2-82d3-40b2dd359a7b" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.amkor.com/role/PensionandSeverancePlansDefinedBenefitPlansAllocationofplanassetsDetails" xlink:type="simple" xlink:href="amkr-20221231.xsd#PensionandSeverancePlansDefinedBenefitPlansAllocationofplanassetsDetails"/>
  <link:definitionLink xlink:role="http://www.amkor.com/role/PensionandSeverancePlansDefinedBenefitPlansAllocationofplanassetsDetails" xlink:type="extended" id="ic7a7f203f3fb4002ac218bd7f0207d8d_PensionandSeverancePlansDefinedBenefitPlansAllocationofplanassetsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_5a400188-f02a-4256-9c46-5a9768df9593" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanPlanAssetsTargetAllocationPercentage_4651a7f2-dead-41ef-899e-6a48820d2065" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DefinedBenefitPlanPlanAssetsTargetAllocationPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_5a400188-f02a-4256-9c46-5a9768df9593" xlink:to="loc_us-gaap_DefinedBenefitPlanPlanAssetsTargetAllocationPercentage_4651a7f2-dead-41ef-899e-6a48820d2065" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_f58253b0-3aa2-4377-9c88-008116807c8a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DefinedBenefitPlanFairValueOfPlanAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_5a400188-f02a-4256-9c46-5a9768df9593" xlink:to="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_f58253b0-3aa2-4377-9c88-008116807c8a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_764e2be1-a508-475e-934b-f5ae98368059" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_5a400188-f02a-4256-9c46-5a9768df9593" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_764e2be1-a508-475e-934b-f5ae98368059" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanSponsorLocationAxis_9a2eee14-db69-4823-a99e-3eacb070b2c4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RetirementPlanSponsorLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_764e2be1-a508-475e-934b-f5ae98368059" xlink:to="loc_us-gaap_RetirementPlanSponsorLocationAxis_9a2eee14-db69-4823-a99e-3eacb070b2c4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanSponsorLocationDomain_9a2eee14-db69-4823-a99e-3eacb070b2c4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RetirementPlanSponsorLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanSponsorLocationAxis_9a2eee14-db69-4823-a99e-3eacb070b2c4" xlink:to="loc_us-gaap_RetirementPlanSponsorLocationDomain_9a2eee14-db69-4823-a99e-3eacb070b2c4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanSponsorLocationDomain_72833c75-c993-4277-911d-f0456cc34db5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RetirementPlanSponsorLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanSponsorLocationAxis_9a2eee14-db69-4823-a99e-3eacb070b2c4" xlink:to="loc_us-gaap_RetirementPlanSponsorLocationDomain_72833c75-c993-4277-911d-f0456cc34db5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignPlanMember_5739c4d3-889d-4b43-a202-4ee0fe0b7d69" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ForeignPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanSponsorLocationDomain_72833c75-c993-4277-911d-f0456cc34db5" xlink:to="loc_us-gaap_ForeignPlanMember_5739c4d3-889d-4b43-a202-4ee0fe0b7d69" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_JP_84dab5e5-4d6a-4285-9ff2-ad409b0be81b" xlink:href="https://xbrl.sec.gov/country/2022/country-2022.xsd#country_JP"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ForeignPlanMember_5739c4d3-889d-4b43-a202-4ee0fe0b7d69" xlink:to="loc_country_JP_84dab5e5-4d6a-4285-9ff2-ad409b0be81b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_KR_67c1286f-2e30-4cf7-919c-2e63eec143c3" xlink:href="https://xbrl.sec.gov/country/2022/country-2022.xsd#country_KR"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ForeignPlanMember_5739c4d3-889d-4b43-a202-4ee0fe0b7d69" xlink:to="loc_country_KR_67c1286f-2e30-4cf7-919c-2e63eec143c3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_PH_999941f3-d63b-4c31-8dd4-2c341ff850cf" xlink:href="https://xbrl.sec.gov/country/2022/country-2022.xsd#country_PH"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ForeignPlanMember_5739c4d3-889d-4b43-a202-4ee0fe0b7d69" xlink:to="loc_country_PH_999941f3-d63b-4c31-8dd4-2c341ff850cf" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_e0c787e8-51c5-4b07-8960-52fbed6d193c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_764e2be1-a508-475e-934b-f5ae98368059" xlink:to="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_e0c787e8-51c5-4b07-8960-52fbed6d193c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanAssetCategoriesDomain_e0c787e8-51c5-4b07-8960-52fbed6d193c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PlanAssetCategoriesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_e0c787e8-51c5-4b07-8960-52fbed6d193c" xlink:to="loc_us-gaap_PlanAssetCategoriesDomain_e0c787e8-51c5-4b07-8960-52fbed6d193c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanAssetCategoriesDomain_8abd7f3e-0f3e-4a89-ac62-4776e3cbb7a2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PlanAssetCategoriesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_e0c787e8-51c5-4b07-8960-52fbed6d193c" xlink:to="loc_us-gaap_PlanAssetCategoriesDomain_8abd7f3e-0f3e-4a89-ac62-4776e3cbb7a2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanCashAndCashEquivalentsMember_244c6796-2aee-443d-837a-e25f41273158" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DefinedBenefitPlanCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_8abd7f3e-0f3e-4a89-ac62-4776e3cbb7a2" xlink:to="loc_us-gaap_DefinedBenefitPlanCashAndCashEquivalentsMember_244c6796-2aee-443d-837a-e25f41273158" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesMember_60061102-4c74-429a-9bc4-2d556964c512" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EquitySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_8abd7f3e-0f3e-4a89-ac62-4776e3cbb7a2" xlink:to="loc_us-gaap_EquitySecuritiesMember_60061102-4c74-429a-9bc4-2d556964c512" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanDebtSecurityMember_d9379b83-711e-4c87-bea0-dbcd718d9d34" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DefinedBenefitPlanDebtSecurityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_8abd7f3e-0f3e-4a89-ac62-4776e3cbb7a2" xlink:to="loc_us-gaap_DefinedBenefitPlanDebtSecurityMember_d9379b83-711e-4c87-bea0-dbcd718d9d34" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_GovernmentBondsMember_808fbd7f-c874-44c5-b0b8-a98634a926ea" xlink:href="amkr-20221231.xsd#amkr_GovernmentBondsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDebtSecurityMember_d9379b83-711e-4c87-bea0-dbcd718d9d34" xlink:to="loc_amkr_GovernmentBondsMember_808fbd7f-c874-44c5-b0b8-a98634a926ea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateBondSecuritiesMember_50060988-d806-40d3-aa31-b0cd36b27357" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CorporateBondSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDebtSecurityMember_d9379b83-711e-4c87-bea0-dbcd718d9d34" xlink:to="loc_us-gaap_CorporateBondSecuritiesMember_50060988-d806-40d3-aa31-b0cd36b27357" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_TreasuryNotesMember_172923ec-8467-4b0b-95ed-7ce1e6d2c89a" xlink:href="amkr-20221231.xsd#amkr_TreasuryNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDebtSecurityMember_d9379b83-711e-4c87-bea0-dbcd718d9d34" xlink:to="loc_amkr_TreasuryNotesMember_172923ec-8467-4b0b-95ed-7ce1e6d2c89a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_MutualAndCommingledEquityFundsMember_d2a9b4a0-1a63-4937-adb1-68da29166118" xlink:href="amkr-20221231.xsd#amkr_MutualAndCommingledEquityFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_8abd7f3e-0f3e-4a89-ac62-4776e3cbb7a2" xlink:to="loc_amkr_MutualAndCommingledEquityFundsMember_d2a9b4a0-1a63-4937-adb1-68da29166118" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_MutualAndCommingledDebtFundsMember_5e6ce0d7-6bf5-4625-a591-6188aa720882" xlink:href="amkr-20221231.xsd#amkr_MutualAndCommingledDebtFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_8abd7f3e-0f3e-4a89-ac62-4776e3cbb7a2" xlink:to="loc_amkr_MutualAndCommingledDebtFundsMember_5e6ce0d7-6bf5-4625-a591-6188aa720882" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_ForeignGuaranteedInvestmentContractMember_acd17114-2fc3-4180-aa4c-404f10f89c3b" xlink:href="amkr-20221231.xsd#amkr_ForeignGuaranteedInvestmentContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_8abd7f3e-0f3e-4a89-ac62-4776e3cbb7a2" xlink:to="loc_amkr_ForeignGuaranteedInvestmentContractMember_acd17114-2fc3-4180-aa4c-404f10f89c3b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_TaiwanRetirementFundMember_7563c0cc-4360-4501-bffc-6fbc3243ce93" xlink:href="amkr-20221231.xsd#amkr_TaiwanRetirementFundMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_8abd7f3e-0f3e-4a89-ac62-4776e3cbb7a2" xlink:to="loc_amkr_TaiwanRetirementFundMember_7563c0cc-4360-4501-bffc-6fbc3243ce93" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_OtherInvestmentTypeMember_3e046d67-0b99-4de9-81e0-5d3b4fd1f5de" xlink:href="amkr-20221231.xsd#amkr_OtherInvestmentTypeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_8abd7f3e-0f3e-4a89-ac62-4776e3cbb7a2" xlink:to="loc_amkr_OtherInvestmentTypeMember_3e046d67-0b99-4de9-81e0-5d3b4fd1f5de" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanEquitySecuritiesMember_a86a47e0-8b58-441f-abac-6a8ea76c8942" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DefinedBenefitPlanEquitySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_8abd7f3e-0f3e-4a89-ac62-4776e3cbb7a2" xlink:to="loc_us-gaap_DefinedBenefitPlanEquitySecuritiesMember_a86a47e0-8b58-441f-abac-6a8ea76c8942" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_08c7e741-e86d-4481-b49e-769dfb337272" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_764e2be1-a508-475e-934b-f5ae98368059" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_08c7e741-e86d-4481-b49e-769dfb337272" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_08c7e741-e86d-4481-b49e-769dfb337272_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_08c7e741-e86d-4481-b49e-769dfb337272" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_08c7e741-e86d-4481-b49e-769dfb337272_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_65a7b6a2-b462-4a84-bbb8-1678f28f0b6a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_08c7e741-e86d-4481-b49e-769dfb337272" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_65a7b6a2-b462-4a84-bbb8-1678f28f0b6a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_189b48e0-5945-432c-82ea-771f100638e2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_65a7b6a2-b462-4a84-bbb8-1678f28f0b6a" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_189b48e0-5945-432c-82ea-771f100638e2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_f200bbfa-93b9-4add-9823-3ffa59dc66fd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_65a7b6a2-b462-4a84-bbb8-1678f28f0b6a" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_f200bbfa-93b9-4add-9823-3ffa59dc66fd" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.amkor.com/role/AccumulatedOtherComprehensiveIncomeLossDetails" xlink:type="simple" xlink:href="amkr-20221231.xsd#AccumulatedOtherComprehensiveIncomeLossDetails"/>
  <link:definitionLink xlink:role="http://www.amkor.com/role/AccumulatedOtherComprehensiveIncomeLossDetails" xlink:type="extended" id="i79fea9a4cc7e48bc986b0a078afd279f_AccumulatedOtherComprehensiveIncomeLossDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_f3521a52-3432-442f-a586-1a4a001e1798" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_34faac49-8610-403b-a494-4120be328593" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_f3521a52-3432-442f-a586-1a4a001e1798" xlink:to="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_34faac49-8610-403b-a494-4120be328593" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_fe335615-9e4a-487b-a628-4bbb4d0458d6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_34faac49-8610-403b-a494-4120be328593" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_fe335615-9e4a-487b-a628-4bbb4d0458d6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_8e07dc51-e81b-42ee-a3e5-0b2a8180437c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_34faac49-8610-403b-a494-4120be328593" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_8e07dc51-e81b-42ee-a3e5-0b2a8180437c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_67150a5f-e34c-4c87-8971-9af88dde7bb0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_34faac49-8610-403b-a494-4120be328593" xlink:to="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_67150a5f-e34c-4c87-8971-9af88dde7bb0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_847e810c-af50-4379-af95-7af5c9b3eb07" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_34faac49-8610-403b-a494-4120be328593" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_847e810c-af50-4379-af95-7af5c9b3eb07" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_d266c6ea-409b-4200-a726-b699a600cca6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_f1254b76-1eab-4938-85de-6f9fcab83ed6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_f3521a52-3432-442f-a586-1a4a001e1798" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_f1254b76-1eab-4938-85de-6f9fcab83ed6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_af3fe697-c4df-44a7-8c85-74d7aa6e94f3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_f1254b76-1eab-4938-85de-6f9fcab83ed6" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_af3fe697-c4df-44a7-8c85-74d7aa6e94f3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_af3fe697-c4df-44a7-8c85-74d7aa6e94f3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_af3fe697-c4df-44a7-8c85-74d7aa6e94f3" xlink:to="loc_us-gaap_EquityComponentDomain_af3fe697-c4df-44a7-8c85-74d7aa6e94f3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_5659609a-145a-4a37-80a9-21cfffd60d94" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_af3fe697-c4df-44a7-8c85-74d7aa6e94f3" xlink:to="loc_us-gaap_EquityComponentDomain_5659609a-145a-4a37-80a9-21cfffd60d94" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember_35e4c27d-0080-4675-b535-fd12346e5ed9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_5659609a-145a-4a37-80a9-21cfffd60d94" xlink:to="loc_us-gaap_AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember_35e4c27d-0080-4675-b535-fd12346e5ed9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember_e9359d9d-4335-4e13-96ea-d566720a3939" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_5659609a-145a-4a37-80a9-21cfffd60d94" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember_e9359d9d-4335-4e13-96ea-d566720a3939" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember_a4bdd593-ec5c-4b5a-ab36-4547054af7cb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_5659609a-145a-4a37-80a9-21cfffd60d94" xlink:to="loc_us-gaap_AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember_a4bdd593-ec5c-4b5a-ab36-4547054af7cb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_8af70d61-b246-45aa-97e7-d6bd0f4a415d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_5659609a-145a-4a37-80a9-21cfffd60d94" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_8af70d61-b246-45aa-97e7-d6bd0f4a415d" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.amkor.com/role/DerivativesFairValueOfDerivativeInstrumentsDetails" xlink:type="simple" xlink:href="amkr-20221231.xsd#DerivativesFairValueOfDerivativeInstrumentsDetails"/>
  <link:definitionLink xlink:role="http://www.amkor.com/role/DerivativesFairValueOfDerivativeInstrumentsDetails" xlink:type="extended" id="icf99669a8f0541acb969cee8e5187b12_DerivativesFairValueOfDerivativeInstrumentsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativesFairValueLineItems_6a5c9a6b-bbe5-465f-81c5-13dd2d3341ef" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DerivativesFairValueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetNotionalAmount_f777ef5a-8199-484c-968a-d8b779ed8332" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DerivativeAssetNotionalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_6a5c9a6b-bbe5-465f-81c5-13dd2d3341ef" xlink:to="loc_us-gaap_DerivativeAssetNotionalAmount_f777ef5a-8199-484c-968a-d8b779ed8332" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssets_4d57b6e2-5577-48d5-a7cc-985d86889ef0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DerivativeAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_6a5c9a6b-bbe5-465f-81c5-13dd2d3341ef" xlink:to="loc_us-gaap_DerivativeAssets_4d57b6e2-5577-48d5-a7cc-985d86889ef0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilities_80441f1a-d6e5-4486-a52f-9f22f4713dc1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DerivativeLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_6a5c9a6b-bbe5-465f-81c5-13dd2d3341ef" xlink:to="loc_us-gaap_DerivativeLiabilities_80441f1a-d6e5-4486-a52f-9f22f4713dc1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeNet_1680607f-6b48-4679-bca6-3cd431a51c0d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DerivativeFairValueOfDerivativeNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_6a5c9a6b-bbe5-465f-81c5-13dd2d3341ef" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeNet_1680607f-6b48-4679-bca6-3cd431a51c0d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetStatementOfFinancialPositionExtensibleEnumeration_393f9d29-9cc4-4c7c-9c4e-c84b8efeb710" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DerivativeAssetStatementOfFinancialPositionExtensibleEnumeration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_6a5c9a6b-bbe5-465f-81c5-13dd2d3341ef" xlink:to="loc_us-gaap_DerivativeAssetStatementOfFinancialPositionExtensibleEnumeration_393f9d29-9cc4-4c7c-9c4e-c84b8efeb710" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilityStatementOfFinancialPositionExtensibleEnumeration_045a8cba-006a-4c0e-a5de-c61c29711803" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DerivativeLiabilityStatementOfFinancialPositionExtensibleEnumeration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_6a5c9a6b-bbe5-465f-81c5-13dd2d3341ef" xlink:to="loc_us-gaap_DerivativeLiabilityStatementOfFinancialPositionExtensibleEnumeration_045a8cba-006a-4c0e-a5de-c61c29711803" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_136addeb-6e45-44db-8bde-8101fd908b09" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_6a5c9a6b-bbe5-465f-81c5-13dd2d3341ef" xlink:to="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_136addeb-6e45-44db-8bde-8101fd908b09" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_fe550099-b1ef-4b80-9798-7038c10ec7bb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_136addeb-6e45-44db-8bde-8101fd908b09" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_fe550099-b1ef-4b80-9798-7038c10ec7bb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_fe550099-b1ef-4b80-9798-7038c10ec7bb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_fe550099-b1ef-4b80-9798-7038c10ec7bb" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_fe550099-b1ef-4b80-9798-7038c10ec7bb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_5c9e6784-c19b-4d4f-8e7d-afdf1f7c88ec" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_fe550099-b1ef-4b80-9798-7038c10ec7bb" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_5c9e6784-c19b-4d4f-8e7d-afdf1f7c88ec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeForwardMember_9b8e8f85-eb69-451f-a05e-798901aa471f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ForeignExchangeForwardMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_5c9e6784-c19b-4d4f-8e7d-afdf1f7c88ec" xlink:to="loc_us-gaap_ForeignExchangeForwardMember_9b8e8f85-eb69-451f-a05e-798901aa471f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CurrencyAxis_b4a3c0e7-d690-4f70-8f8c-be26a4011422" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_CurrencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_136addeb-6e45-44db-8bde-8101fd908b09" xlink:to="loc_srt_CurrencyAxis_b4a3c0e7-d690-4f70-8f8c-be26a4011422" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_AllCurrenciesDomain_b4a3c0e7-d690-4f70-8f8c-be26a4011422_default" xlink:href="https://xbrl.sec.gov/currency/2022/currency-2022.xsd#currency_AllCurrenciesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CurrencyAxis_b4a3c0e7-d690-4f70-8f8c-be26a4011422" xlink:to="loc_currency_AllCurrenciesDomain_b4a3c0e7-d690-4f70-8f8c-be26a4011422_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_AllCurrenciesDomain_be856b46-d090-4045-beeb-d743a0c96186" xlink:href="https://xbrl.sec.gov/currency/2022/currency-2022.xsd#currency_AllCurrenciesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CurrencyAxis_b4a3c0e7-d690-4f70-8f8c-be26a4011422" xlink:to="loc_currency_AllCurrenciesDomain_be856b46-d090-4045-beeb-d743a0c96186" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_JPY_7d44624c-61db-41d7-adf3-3ecc7eaefdaf" xlink:href="https://xbrl.sec.gov/currency/2022/currency-2022.xsd#currency_JPY"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_currency_AllCurrenciesDomain_be856b46-d090-4045-beeb-d743a0c96186" xlink:to="loc_currency_JPY_7d44624c-61db-41d7-adf3-3ecc7eaefdaf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_KRW_e43ccf7b-436e-496c-9773-57955d2343c7" xlink:href="https://xbrl.sec.gov/currency/2022/currency-2022.xsd#currency_KRW"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_currency_AllCurrenciesDomain_be856b46-d090-4045-beeb-d743a0c96186" xlink:to="loc_currency_KRW_e43ccf7b-436e-496c-9773-57955d2343c7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_PHP_ce6b110d-5c12-4fc7-bfa8-b71683eb5ae2" xlink:href="https://xbrl.sec.gov/currency/2022/currency-2022.xsd#currency_PHP"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_currency_AllCurrenciesDomain_be856b46-d090-4045-beeb-d743a0c96186" xlink:to="loc_currency_PHP_ce6b110d-5c12-4fc7-bfa8-b71683eb5ae2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_TWD_87f333a6-e6eb-4289-bad3-56a2aa311ff4" xlink:href="https://xbrl.sec.gov/currency/2022/currency-2022.xsd#currency_TWD"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_currency_AllCurrenciesDomain_be856b46-d090-4045-beeb-d743a0c96186" xlink:to="loc_currency_TWD_87f333a6-e6eb-4289-bad3-56a2aa311ff4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_5f1668cc-6f64-4a24-a25f-ffca9ba39d13" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_136addeb-6e45-44db-8bde-8101fd908b09" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_5f1668cc-6f64-4a24-a25f-ffca9ba39d13" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_5f1668cc-6f64-4a24-a25f-ffca9ba39d13_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_5f1668cc-6f64-4a24-a25f-ffca9ba39d13" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_5f1668cc-6f64-4a24-a25f-ffca9ba39d13_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_d4ad4589-20ab-4158-9853-5b1615ae686c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_5f1668cc-6f64-4a24-a25f-ffca9ba39d13" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_d4ad4589-20ab-4158-9853-5b1615ae686c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_85b57c25-2b13-43a4-a7e7-b6b417a9d61d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_d4ad4589-20ab-4158-9853-5b1615ae686c" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_85b57c25-2b13-43a4-a7e7-b6b417a9d61d" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.amkor.com/role/FairValueMeasurementsDetails" xlink:type="simple" xlink:href="amkr-20221231.xsd#FairValueMeasurementsDetails"/>
  <link:definitionLink xlink:role="http://www.amkor.com/role/FairValueMeasurementsDetails" xlink:type="extended" id="i596ac0f8b2ae4f548240a523f949a7ae_FairValueMeasurementsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_4f3de262-c117-4c62-a254-9c9d72feacd4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFairValue_ba6fcd4a-ca91-4498-857b-3f2408d74fa9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_4f3de262-c117-4c62-a254-9c9d72feacd4" xlink:to="loc_us-gaap_DebtInstrumentFairValue_ba6fcd4a-ca91-4498-857b-3f2408d74fa9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByBalanceSheetGroupingTable_70bfadf0-0d08-4849-b8cd-2c3403008a8d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueByBalanceSheetGroupingTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_4f3de262-c117-4c62-a254-9c9d72feacd4" xlink:to="loc_us-gaap_FairValueByBalanceSheetGroupingTable_70bfadf0-0d08-4849-b8cd-2c3403008a8d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_9c6d977a-388f-44e0-bed2-b246ec5250de" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueByMeasurementBasisAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_70bfadf0-0d08-4849-b8cd-2c3403008a8d" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_9c6d977a-388f-44e0-bed2-b246ec5250de" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_9c6d977a-388f-44e0-bed2-b246ec5250de_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_9c6d977a-388f-44e0-bed2-b246ec5250de" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_9c6d977a-388f-44e0-bed2-b246ec5250de_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_d585008d-88c2-4d54-a751-ceceb868e8df" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueDisclosureItemAmountsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_9c6d977a-388f-44e0-bed2-b246ec5250de" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_d585008d-88c2-4d54-a751-ceceb868e8df" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_5886b022-6bd6-4957-b190-270b9769b90c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_d585008d-88c2-4d54-a751-ceceb868e8df" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_5886b022-6bd6-4957-b190-270b9769b90c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_46579930-f028-4d7e-8988-cf23a2a2b51c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_d585008d-88c2-4d54-a751-ceceb868e8df" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_46579930-f028-4d7e-8988-cf23a2a2b51c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_3ceab0fc-6ec7-4633-956a-ec80d587ab3b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_d585008d-88c2-4d54-a751-ceceb868e8df" xlink:to="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_3ceab0fc-6ec7-4633-956a-ec80d587ab3b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_bd14599b-b57e-40f1-95b8-dc5ba6906e38" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_70bfadf0-0d08-4849-b8cd-2c3403008a8d" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_bd14599b-b57e-40f1-95b8-dc5ba6906e38" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_bd14599b-b57e-40f1-95b8-dc5ba6906e38_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_bd14599b-b57e-40f1-95b8-dc5ba6906e38" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_bd14599b-b57e-40f1-95b8-dc5ba6906e38_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_adedbab6-fdb8-4b5d-aecf-27b1932dd134" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_bd14599b-b57e-40f1-95b8-dc5ba6906e38" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_adedbab6-fdb8-4b5d-aecf-27b1932dd134" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_9b4716d4-ef3c-41f5-a388-7626a0bf4e44" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_adedbab6-fdb8-4b5d-aecf-27b1932dd134" xlink:to="loc_us-gaap_SeniorNotesMember_9b4716d4-ef3c-41f5-a388-7626a0bf4e44" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_SubsidiaryTermLoansandRevolvingCreditFacilitiesMember_f5d252a2-e38c-45c0-b3e7-89fecb252bcf" xlink:href="amkr-20221231.xsd#amkr_SubsidiaryTermLoansandRevolvingCreditFacilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_adedbab6-fdb8-4b5d-aecf-27b1932dd134" xlink:to="loc_amkr_SubsidiaryTermLoansandRevolvingCreditFacilitiesMember_f5d252a2-e38c-45c0-b3e7-89fecb252bcf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_b0dd211f-7a5a-4a8a-9435-366d1548e0e7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_70bfadf0-0d08-4849-b8cd-2c3403008a8d" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_b0dd211f-7a5a-4a8a-9435-366d1548e0e7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_b0dd211f-7a5a-4a8a-9435-366d1548e0e7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_b0dd211f-7a5a-4a8a-9435-366d1548e0e7" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_b0dd211f-7a5a-4a8a-9435-366d1548e0e7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_675cd821-bfaf-4ef0-88b6-95395536602c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_b0dd211f-7a5a-4a8a-9435-366d1548e0e7" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_675cd821-bfaf-4ef0-88b6-95395536602c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_0babd7c4-4809-4470-8cce-5b6161eff426" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_675cd821-bfaf-4ef0-88b6-95395536602c" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_0babd7c4-4809-4470-8cce-5b6161eff426" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_98e2b5e8-7e59-4d67-8d74-d3535bd8c51d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_675cd821-bfaf-4ef0-88b6-95395536602c" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_98e2b5e8-7e59-4d67-8d74-d3535bd8c51d" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.amkor.com/role/BusinessSegmentsCustomerConcentrationsandGeographicInformationNetSalesbyProductGroupDetails" xlink:type="simple" xlink:href="amkr-20221231.xsd#BusinessSegmentsCustomerConcentrationsandGeographicInformationNetSalesbyProductGroupDetails"/>
  <link:definitionLink xlink:role="http://www.amkor.com/role/BusinessSegmentsCustomerConcentrationsandGeographicInformationNetSalesbyProductGroupDetails" xlink:type="extended" id="i4c8631c98f0d40ae9e5a982d895728b0_BusinessSegmentsCustomerConcentrationsandGeographicInformationNetSalesbyProductGroupDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_b7493a80-4200-40fc-bcf0-3982de13b57e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_994e8a18-819a-4994-a866-cc83b23a2e3b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_b7493a80-4200-40fc-bcf0-3982de13b57e" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_994e8a18-819a-4994-a866-cc83b23a2e3b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_ec12ecf3-d262-4120-8568-ef91b4318009" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConcentrationRiskPercentage1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_b7493a80-4200-40fc-bcf0-3982de13b57e" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_ec12ecf3-d262-4120-8568-ef91b4318009" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_2931c1e4-cfe2-4837-90bc-5799adf3bb8f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_b7493a80-4200-40fc-bcf0-3982de13b57e" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_2931c1e4-cfe2-4837-90bc-5799adf3bb8f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_873ed78f-a0d8-4e2e-9d44-a828af30d35c" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_2931c1e4-cfe2-4837-90bc-5799adf3bb8f" xlink:to="loc_srt_ProductOrServiceAxis_873ed78f-a0d8-4e2e-9d44-a828af30d35c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_873ed78f-a0d8-4e2e-9d44-a828af30d35c_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_873ed78f-a0d8-4e2e-9d44-a828af30d35c" xlink:to="loc_srt_ProductsAndServicesDomain_873ed78f-a0d8-4e2e-9d44-a828af30d35c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_32f328cf-ba89-41c9-95ba-214b7bb2154e" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_873ed78f-a0d8-4e2e-9d44-a828af30d35c" xlink:to="loc_srt_ProductsAndServicesDomain_32f328cf-ba89-41c9-95ba-214b7bb2154e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_AdvancedProductsMember_1c09d6fc-a421-4bc3-aa79-1e43f14b4c66" xlink:href="amkr-20221231.xsd#amkr_AdvancedProductsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_32f328cf-ba89-41c9-95ba-214b7bb2154e" xlink:to="loc_amkr_AdvancedProductsMember_1c09d6fc-a421-4bc3-aa79-1e43f14b4c66" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_MainstreamProductsMember_d5c2590b-2212-4418-835f-fa700df0658d" xlink:href="amkr-20221231.xsd#amkr_MainstreamProductsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_32f328cf-ba89-41c9-95ba-214b7bb2154e" xlink:to="loc_amkr_MainstreamProductsMember_d5c2590b-2212-4418-835f-fa700df0658d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_SalesChannelCommunicationsMember_21832382-271f-49db-a5c3-a5f1d48cd86f" xlink:href="amkr-20221231.xsd#amkr_SalesChannelCommunicationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_32f328cf-ba89-41c9-95ba-214b7bb2154e" xlink:to="loc_amkr_SalesChannelCommunicationsMember_21832382-271f-49db-a5c3-a5f1d48cd86f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_SalesChannelAutomotiveIndustrialAndOtherMember_d4ea4a25-fce6-4861-9861-20dcef891198" xlink:href="amkr-20221231.xsd#amkr_SalesChannelAutomotiveIndustrialAndOtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_32f328cf-ba89-41c9-95ba-214b7bb2154e" xlink:to="loc_amkr_SalesChannelAutomotiveIndustrialAndOtherMember_d4ea4a25-fce6-4861-9861-20dcef891198" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_SalesChannelConsumerGoodsMember_2f39c13b-3bad-43c7-a15a-16a241f9f210" xlink:href="amkr-20221231.xsd#amkr_SalesChannelConsumerGoodsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_32f328cf-ba89-41c9-95ba-214b7bb2154e" xlink:to="loc_amkr_SalesChannelConsumerGoodsMember_2f39c13b-3bad-43c7-a15a-16a241f9f210" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_SalesChannelComputingMember_612c4a66-9491-4412-ad6c-dbed94e10c19" xlink:href="amkr-20221231.xsd#amkr_SalesChannelComputingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_32f328cf-ba89-41c9-95ba-214b7bb2154e" xlink:to="loc_amkr_SalesChannelComputingMember_612c4a66-9491-4412-ad6c-dbed94e10c19" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_1b7a200a-b7dd-4e53-868b-6d9d50bc7f1a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_2931c1e4-cfe2-4837-90bc-5799adf3bb8f" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_1b7a200a-b7dd-4e53-868b-6d9d50bc7f1a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_1b7a200a-b7dd-4e53-868b-6d9d50bc7f1a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_1b7a200a-b7dd-4e53-868b-6d9d50bc7f1a" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_1b7a200a-b7dd-4e53-868b-6d9d50bc7f1a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_d09df6a0-f151-4a62-aa6d-68027869a46f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_1b7a200a-b7dd-4e53-868b-6d9d50bc7f1a" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_d09df6a0-f151-4a62-aa6d-68027869a46f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesMember_c45201e3-42c5-4677-b484-4098f0f1b259" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_d09df6a0-f151-4a62-aa6d-68027869a46f" xlink:to="loc_us-gaap_SalesMember_c45201e3-42c5-4677-b484-4098f0f1b259" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_5d6f26da-0e83-4c01-a7ae-e75f36da653a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConcentrationRiskByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_2931c1e4-cfe2-4837-90bc-5799adf3bb8f" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_5d6f26da-0e83-4c01-a7ae-e75f36da653a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_5d6f26da-0e83-4c01-a7ae-e75f36da653a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_5d6f26da-0e83-4c01-a7ae-e75f36da653a" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_5d6f26da-0e83-4c01-a7ae-e75f36da653a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_2d015d4a-55f0-48e4-bff8-495593ac1938" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_5d6f26da-0e83-4c01-a7ae-e75f36da653a" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_2d015d4a-55f0-48e4-bff8-495593ac1938" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductConcentrationRiskMember_24353ebd-9daa-4bd7-a3f9-92670183d440" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ProductConcentrationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_2d015d4a-55f0-48e4-bff8-495593ac1938" xlink:to="loc_us-gaap_ProductConcentrationRiskMember_24353ebd-9daa-4bd7-a3f9-92670183d440" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.amkor.com/role/BusinessSegmentsCustomerConcentrationsandGeographicInformationNetSalesbyRegionDetails" xlink:type="simple" xlink:href="amkr-20221231.xsd#BusinessSegmentsCustomerConcentrationsandGeographicInformationNetSalesbyRegionDetails"/>
  <link:definitionLink xlink:role="http://www.amkor.com/role/BusinessSegmentsCustomerConcentrationsandGeographicInformationNetSalesbyRegionDetails" xlink:type="extended" id="id2ff46caac964059a3a6cc6203a090fa_BusinessSegmentsCustomerConcentrationsandGeographicInformationNetSalesbyRegionDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_1bf4196e-08bd-4d37-aaf7-70f55ab9ad62" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_eb96747d-96c5-4664-a6f9-ea631f903bd0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_1bf4196e-08bd-4d37-aaf7-70f55ab9ad62" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_eb96747d-96c5-4664-a6f9-ea631f903bd0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_9bc206e4-1313-432a-bd8c-493786c13f34" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_1bf4196e-08bd-4d37-aaf7-70f55ab9ad62" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_9bc206e4-1313-432a-bd8c-493786c13f34" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_2d519c8f-2af7-41fe-83cc-871cab43bc2b" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_9bc206e4-1313-432a-bd8c-493786c13f34" xlink:to="loc_srt_StatementGeographicalAxis_2d519c8f-2af7-41fe-83cc-871cab43bc2b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_2d519c8f-2af7-41fe-83cc-871cab43bc2b_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_2d519c8f-2af7-41fe-83cc-871cab43bc2b" xlink:to="loc_srt_SegmentGeographicalDomain_2d519c8f-2af7-41fe-83cc-871cab43bc2b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_a3bbd98d-9c77-494c-b42d-dd4eafa1dc05" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_2d519c8f-2af7-41fe-83cc-871cab43bc2b" xlink:to="loc_srt_SegmentGeographicalDomain_a3bbd98d-9c77-494c-b42d-dd4eafa1dc05" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EMEAMember_2547c3c5-767b-49ed-b2be-eaf3978b5669" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EMEAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_a3bbd98d-9c77-494c-b42d-dd4eafa1dc05" xlink:to="loc_us-gaap_EMEAMember_2547c3c5-767b-49ed-b2be-eaf3978b5669" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_JP_5d2dbcf2-606e-4719-8357-d6467b509b37" xlink:href="https://xbrl.sec.gov/country/2022/country-2022.xsd#country_JP"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_a3bbd98d-9c77-494c-b42d-dd4eafa1dc05" xlink:to="loc_country_JP_5d2dbcf2-606e-4719-8357-d6467b509b37" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_AsiaMember_4d0ae639-36c3-4746-a7e3-09780cdc389a" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_AsiaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_a3bbd98d-9c77-494c-b42d-dd4eafa1dc05" xlink:to="loc_srt_AsiaMember_4d0ae639-36c3-4746-a7e3-09780cdc389a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonUsMember_b122db52-d61d-4fb3-8f2a-18fec240cd9c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NonUsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_a3bbd98d-9c77-494c-b42d-dd4eafa1dc05" xlink:to="loc_us-gaap_NonUsMember_b122db52-d61d-4fb3-8f2a-18fec240cd9c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_234e22d8-48bc-4114-ae35-24b66fcfb483" xlink:href="https://xbrl.sec.gov/country/2022/country-2022.xsd#country_US"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_a3bbd98d-9c77-494c-b42d-dd4eafa1dc05" xlink:to="loc_country_US_234e22d8-48bc-4114-ae35-24b66fcfb483" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.amkor.com/role/BusinessSegmentsCustomerConcentrationsandGeographicInformationNarrativeDetails" xlink:type="simple" xlink:href="amkr-20221231.xsd#BusinessSegmentsCustomerConcentrationsandGeographicInformationNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.amkor.com/role/BusinessSegmentsCustomerConcentrationsandGeographicInformationNarrativeDetails" xlink:type="extended" id="ia99144caf5fa4d0c990cf4d8eaa02b2a_BusinessSegmentsCustomerConcentrationsandGeographicInformationNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_dca98509-4357-483e-8331-58f970c60ea6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_bb3d139b-8c1f-4339-a7c6-abeeb4e3d753" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConcentrationRiskPercentage1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_dca98509-4357-483e-8331-58f970c60ea6" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_bb3d139b-8c1f-4339-a7c6-abeeb4e3d753" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfOperatingSegments_dec53c9a-e8a8-4b05-8356-4584255e35bb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NumberOfOperatingSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_dca98509-4357-483e-8331-58f970c60ea6" xlink:to="loc_us-gaap_NumberOfOperatingSegments_dec53c9a-e8a8-4b05-8356-4584255e35bb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_83b4d5ee-f916-4b4c-821b-96f345f7a141" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_dca98509-4357-483e-8331-58f970c60ea6" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_83b4d5ee-f916-4b4c-821b-96f345f7a141" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MajorCustomersAxis_b971edc5-88d5-446a-8420-a82e828e0d5f" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MajorCustomersAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_83b4d5ee-f916-4b4c-821b-96f345f7a141" xlink:to="loc_srt_MajorCustomersAxis_b971edc5-88d5-446a-8420-a82e828e0d5f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_b971edc5-88d5-446a-8420-a82e828e0d5f_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_MajorCustomersAxis_b971edc5-88d5-446a-8420-a82e828e0d5f" xlink:to="loc_srt_NameOfMajorCustomerDomain_b971edc5-88d5-446a-8420-a82e828e0d5f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_b4ccf58c-5b16-45a0-a620-770db063f42d" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_MajorCustomersAxis_b971edc5-88d5-446a-8420-a82e828e0d5f" xlink:to="loc_srt_NameOfMajorCustomerDomain_b4ccf58c-5b16-45a0-a620-770db063f42d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_LargestCustomerMember_e5aea1e2-369a-44d2-bac2-3d436a491798" xlink:href="amkr-20221231.xsd#amkr_LargestCustomerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_b4ccf58c-5b16-45a0-a620-770db063f42d" xlink:to="loc_amkr_LargestCustomerMember_e5aea1e2-369a-44d2-bac2-3d436a491798" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_SecondLargestCustomerMember_f5e5a26d-bc8f-40bd-8bf2-c3c9621f19d6" xlink:href="amkr-20221231.xsd#amkr_SecondLargestCustomerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_b4ccf58c-5b16-45a0-a620-770db063f42d" xlink:to="loc_amkr_SecondLargestCustomerMember_f5e5a26d-bc8f-40bd-8bf2-c3c9621f19d6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_5646b734-5aaa-4a0f-9bbf-cd749e5e5317" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_83b4d5ee-f916-4b4c-821b-96f345f7a141" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_5646b734-5aaa-4a0f-9bbf-cd749e5e5317" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_5646b734-5aaa-4a0f-9bbf-cd749e5e5317_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_5646b734-5aaa-4a0f-9bbf-cd749e5e5317" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_5646b734-5aaa-4a0f-9bbf-cd749e5e5317_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_09033369-f4d3-4f6f-a1d9-6dfa3e31e478" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_5646b734-5aaa-4a0f-9bbf-cd749e5e5317" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_09033369-f4d3-4f6f-a1d9-6dfa3e31e478" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesMember_b9ce9f2c-305b-49de-9782-ab0ba92d89b5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_09033369-f4d3-4f6f-a1d9-6dfa3e31e478" xlink:to="loc_us-gaap_SalesMember_b9ce9f2c-305b-49de-9782-ab0ba92d89b5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_f56fbe41-43c2-46a0-bb5f-406e685d3066" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConcentrationRiskByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_83b4d5ee-f916-4b4c-821b-96f345f7a141" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_f56fbe41-43c2-46a0-bb5f-406e685d3066" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_f56fbe41-43c2-46a0-bb5f-406e685d3066_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_f56fbe41-43c2-46a0-bb5f-406e685d3066" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_f56fbe41-43c2-46a0-bb5f-406e685d3066_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_1691a68f-b5dd-45aa-936b-1c2e763c2b79" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_f56fbe41-43c2-46a0-bb5f-406e685d3066" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_1691a68f-b5dd-45aa-936b-1c2e763c2b79" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerConcentrationRiskMember_b5e3f6f5-d7b5-4166-81b1-3337ede6a516" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CustomerConcentrationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_1691a68f-b5dd-45aa-936b-1c2e763c2b79" xlink:to="loc_us-gaap_CustomerConcentrationRiskMember_b5e3f6f5-d7b5-4166-81b1-3337ede6a516" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.amkor.com/role/BusinessSegmentsCustomerConcentrationsandGeographicInformationPropertyPlantandEquipmentNetDetails" xlink:type="simple" xlink:href="amkr-20221231.xsd#BusinessSegmentsCustomerConcentrationsandGeographicInformationPropertyPlantandEquipmentNetDetails"/>
  <link:definitionLink xlink:role="http://www.amkor.com/role/BusinessSegmentsCustomerConcentrationsandGeographicInformationPropertyPlantandEquipmentNetDetails" xlink:type="extended" id="iea581084012a42469fd9000e72e08253_BusinessSegmentsCustomerConcentrationsandGeographicInformationPropertyPlantandEquipmentNetDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_384e0be9-0c0c-4436-9c2b-5c8f8f16650b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_e9a98d18-58bc-4a93-8fdc-2007edf31f16" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_384e0be9-0c0c-4436-9c2b-5c8f8f16650b" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_e9a98d18-58bc-4a93-8fdc-2007edf31f16" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_811aee23-1ea0-4106-b420-8cf298679277" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_384e0be9-0c0c-4436-9c2b-5c8f8f16650b" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_811aee23-1ea0-4106-b420-8cf298679277" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_04119722-d632-4241-926a-44416075aead" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_811aee23-1ea0-4106-b420-8cf298679277" xlink:to="loc_srt_StatementGeographicalAxis_04119722-d632-4241-926a-44416075aead" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_04119722-d632-4241-926a-44416075aead_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_04119722-d632-4241-926a-44416075aead" xlink:to="loc_srt_SegmentGeographicalDomain_04119722-d632-4241-926a-44416075aead_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_e7bd5be3-0750-42f7-9a0c-7554237df09a" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_04119722-d632-4241-926a-44416075aead" xlink:to="loc_srt_SegmentGeographicalDomain_e7bd5be3-0750-42f7-9a0c-7554237df09a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_CN_78cd7d8f-3acb-40d4-9261-26654e68e2d8" xlink:href="https://xbrl.sec.gov/country/2022/country-2022.xsd#country_CN"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_e7bd5be3-0750-42f7-9a0c-7554237df09a" xlink:to="loc_country_CN_78cd7d8f-3acb-40d4-9261-26654e68e2d8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_JP_81cdc138-1708-4b40-926f-f7f531d49431" xlink:href="https://xbrl.sec.gov/country/2022/country-2022.xsd#country_JP"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_e7bd5be3-0750-42f7-9a0c-7554237df09a" xlink:to="loc_country_JP_81cdc138-1708-4b40-926f-f7f531d49431" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_KR_56a2010f-df43-448c-9272-f181e5134fd2" xlink:href="https://xbrl.sec.gov/country/2022/country-2022.xsd#country_KR"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_e7bd5be3-0750-42f7-9a0c-7554237df09a" xlink:to="loc_country_KR_56a2010f-df43-448c-9272-f181e5134fd2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_MY_93155ef8-b823-47d1-b883-646f7ee34f05" xlink:href="https://xbrl.sec.gov/country/2022/country-2022.xsd#country_MY"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_e7bd5be3-0750-42f7-9a0c-7554237df09a" xlink:to="loc_country_MY_93155ef8-b823-47d1-b883-646f7ee34f05" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_PH_2383c384-2576-4538-ae55-9e124988a2bc" xlink:href="https://xbrl.sec.gov/country/2022/country-2022.xsd#country_PH"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_e7bd5be3-0750-42f7-9a0c-7554237df09a" xlink:to="loc_country_PH_2383c384-2576-4538-ae55-9e124988a2bc" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_PT_d4afacaf-7822-436f-8cdd-7e49a73f58c7" xlink:href="https://xbrl.sec.gov/country/2022/country-2022.xsd#country_PT"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_e7bd5be3-0750-42f7-9a0c-7554237df09a" xlink:to="loc_country_PT_d4afacaf-7822-436f-8cdd-7e49a73f58c7" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_TW_e5bf9fb3-7da3-4242-8698-61f33ce0d00c" xlink:href="https://xbrl.sec.gov/country/2022/country-2022.xsd#country_TW"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_e7bd5be3-0750-42f7-9a0c-7554237df09a" xlink:to="loc_country_TW_e5bf9fb3-7da3-4242-8698-61f33ce0d00c" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_VN_3d355004-c2b9-4770-8339-21dbaad1908b" xlink:href="https://xbrl.sec.gov/country/2022/country-2022.xsd#country_VN"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_e7bd5be3-0750-42f7-9a0c-7554237df09a" xlink:to="loc_country_VN_3d355004-c2b9-4770-8339-21dbaad1908b" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_OtherForeignCountriesMember_810f2288-1256-462f-a4f6-f5242969c6c1" xlink:href="amkr-20221231.xsd#amkr_OtherForeignCountriesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_e7bd5be3-0750-42f7-9a0c-7554237df09a" xlink:to="loc_amkr_OtherForeignCountriesMember_810f2288-1256-462f-a4f6-f5242969c6c1" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonUsMember_642c5820-315e-4b56-aee9-9361517a2773" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NonUsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_e7bd5be3-0750-42f7-9a0c-7554237df09a" xlink:to="loc_us-gaap_NonUsMember_642c5820-315e-4b56-aee9-9361517a2773" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_5c677951-f7af-4f76-a4fc-03adedf1290b" xlink:href="https://xbrl.sec.gov/country/2022/country-2022.xsd#country_US"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_e7bd5be3-0750-42f7-9a0c-7554237df09a" xlink:to="loc_country_US_5c677951-f7af-4f76-a4fc-03adedf1290b" xlink:type="arc" order="10"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.amkor.com/role/RestructuringandOtherExitActivitiesDetails" xlink:type="simple" xlink:href="amkr-20221231.xsd#RestructuringandOtherExitActivitiesDetails"/>
  <link:definitionLink xlink:role="http://www.amkor.com/role/RestructuringandOtherExitActivitiesDetails" xlink:type="extended" id="i08fc5775d15640c9aa8ab91c82d2393c_RestructuringandOtherExitActivitiesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_71f6ad40-c66f-45c1-a15a-ee7da5acb5ec" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestructuringCostAndReserveLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserveRollForward_45659194-e24d-4976-8206-8b0bca7efeb4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestructuringReserveRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_71f6ad40-c66f-45c1-a15a-ee7da5acb5ec" xlink:to="loc_us-gaap_RestructuringReserveRollForward_45659194-e24d-4976-8206-8b0bca7efeb4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserve_650153bc-a3ca-497f-916c-3e641f3ffd7b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestructuringReserve"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_45659194-e24d-4976-8206-8b0bca7efeb4" xlink:to="loc_us-gaap_RestructuringReserve_650153bc-a3ca-497f-916c-3e641f3ffd7b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCharges_d1b936f5-86d1-4a3e-8a77-f5be2fad9cb9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestructuringCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_45659194-e24d-4976-8206-8b0bca7efeb4" xlink:to="loc_us-gaap_RestructuringCharges_d1b936f5-86d1-4a3e-8a77-f5be2fad9cb9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForRestructuring_7f04a911-bf5a-4954-9dcc-c9bd5615e416" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PaymentsForRestructuring"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_45659194-e24d-4976-8206-8b0bca7efeb4" xlink:to="loc_us-gaap_PaymentsForRestructuring_7f04a911-bf5a-4954-9dcc-c9bd5615e416" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserveTranslationAndOtherAdjustment_1e8d3b93-a50c-43bc-ad5f-47e4b21eb6b8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestructuringReserveTranslationAndOtherAdjustment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_45659194-e24d-4976-8206-8b0bca7efeb4" xlink:to="loc_us-gaap_RestructuringReserveTranslationAndOtherAdjustment_1e8d3b93-a50c-43bc-ad5f-47e4b21eb6b8" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserve_915cc0a5-33ae-4d2c-8f30-0685e5fd19d4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestructuringReserve"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringAndRelatedCostCostIncurredToDate1_9e249863-cf0b-4872-a48e-676b6934d701" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestructuringAndRelatedCostCostIncurredToDate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_71f6ad40-c66f-45c1-a15a-ee7da5acb5ec" xlink:to="loc_us-gaap_RestructuringAndRelatedCostCostIncurredToDate1_9e249863-cf0b-4872-a48e-676b6934d701" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringAndRelatedCostExpectedCostRemaining1_1f0ab07e-8155-4901-b0d9-6cdeb57c54b8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestructuringAndRelatedCostExpectedCostRemaining1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_71f6ad40-c66f-45c1-a15a-ee7da5acb5ec" xlink:to="loc_us-gaap_RestructuringAndRelatedCostExpectedCostRemaining1_1f0ab07e-8155-4901-b0d9-6cdeb57c54b8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_6e69edf7-8f6c-4eac-ba60-86bcafbd2d13" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_71f6ad40-c66f-45c1-a15a-ee7da5acb5ec" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_6e69edf7-8f6c-4eac-ba60-86bcafbd2d13" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveAxis_c6e8b86e-6bbe-44ea-958a-9d88cdf17ef7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestructuringCostAndReserveAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_6e69edf7-8f6c-4eac-ba60-86bcafbd2d13" xlink:to="loc_us-gaap_RestructuringCostAndReserveAxis_c6e8b86e-6bbe-44ea-958a-9d88cdf17ef7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_c6e8b86e-6bbe-44ea-958a-9d88cdf17ef7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_c6e8b86e-6bbe-44ea-958a-9d88cdf17ef7" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_c6e8b86e-6bbe-44ea-958a-9d88cdf17ef7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_2ba9ac69-264a-46f9-896b-33eb44bf8566" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_c6e8b86e-6bbe-44ea-958a-9d88cdf17ef7" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_2ba9ac69-264a-46f9-896b-33eb44bf8566" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FacilityClosingMember_2dc6c8fc-ee06-4370-afb8-a46261558c93" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FacilityClosingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_2ba9ac69-264a-46f9-896b-33eb44bf8566" xlink:to="loc_us-gaap_FacilityClosingMember_2dc6c8fc-ee06-4370-afb8-a46261558c93" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeSeveranceMember_cffdfc6f-1ebb-4d80-a6cb-8db73fdb2dfb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EmployeeSeveranceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_2ba9ac69-264a-46f9-896b-33eb44bf8566" xlink:to="loc_us-gaap_EmployeeSeveranceMember_cffdfc6f-1ebb-4d80-a6cb-8db73fdb2dfb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherRestructuringMember_8cf087ce-0e9c-4dcb-9328-307448b94b7e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherRestructuringMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_2ba9ac69-264a-46f9-896b-33eb44bf8566" xlink:to="loc_us-gaap_OtherRestructuringMember_8cf087ce-0e9c-4dcb-9328-307448b94b7e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanAxis_5a7b6358-b95c-494e-843e-6ecc97644286" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestructuringPlanAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_6e69edf7-8f6c-4eac-ba60-86bcafbd2d13" xlink:to="loc_us-gaap_RestructuringPlanAxis_5a7b6358-b95c-494e-843e-6ecc97644286" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanDomain_5a7b6358-b95c-494e-843e-6ecc97644286_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestructuringPlanDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringPlanAxis_5a7b6358-b95c-494e-843e-6ecc97644286" xlink:to="loc_us-gaap_RestructuringPlanDomain_5a7b6358-b95c-494e-843e-6ecc97644286_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanDomain_17e96bfb-1888-44c5-bf0b-7b2f75d7cf63" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestructuringPlanDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringPlanAxis_5a7b6358-b95c-494e-843e-6ecc97644286" xlink:to="loc_us-gaap_RestructuringPlanDomain_17e96bfb-1888-44c5-bf0b-7b2f75d7cf63" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_amkr_JapanConsolidationActivitiesMember_2ad2061f-3490-4a52-bfdc-40c05ec7383e" xlink:href="amkr-20221231.xsd#amkr_JapanConsolidationActivitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringPlanDomain_17e96bfb-1888-44c5-bf0b-7b2f75d7cf63" xlink:to="loc_amkr_JapanConsolidationActivitiesMember_2ad2061f-3490-4a52-bfdc-40c05ec7383e" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.amkor.com/role/ScheduleIIValuationandQualifyingAccountsDetails" xlink:type="simple" xlink:href="amkr-20221231.xsd#ScheduleIIValuationandQualifyingAccountsDetails"/>
  <link:definitionLink xlink:role="http://www.amkor.com/role/ScheduleIIValuationandQualifyingAccountsDetails" xlink:type="extended" id="ia8a770254b404d6a8872794c8ff5fca0_ScheduleIIValuationandQualifyingAccountsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_srt_ValuationAndQualifyingAccountsDisclosureLineItems_8a25e3c2-5f2a-4f80-aedc-626b713f8ba0" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ValuationAndQualifyingAccountsDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_e5d1dae0-34d8-4e27-b526-01fe92cc84be" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MovementInValuationAllowancesAndReservesRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ValuationAndQualifyingAccountsDisclosureLineItems_8a25e3c2-5f2a-4f80-aedc-626b713f8ba0" xlink:to="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_e5d1dae0-34d8-4e27-b526-01fe92cc84be" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesBalance_91090cb8-a561-47af-b197-d5dc64f4896d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ValuationAllowancesAndReservesBalance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_e5d1dae0-34d8-4e27-b526-01fe92cc84be" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesBalance_91090cb8-a561-47af-b197-d5dc64f4896d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense_fd0fafde-ad96-4a48-b87a-58539304bd69" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_e5d1dae0-34d8-4e27-b526-01fe92cc84be" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense_fd0fafde-ad96-4a48-b87a-58539304bd69" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDeductions_0d22166e-94d4-4479-a24d-4d0cbaacaba2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ValuationAllowancesAndReservesDeductions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_e5d1dae0-34d8-4e27-b526-01fe92cc84be" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDeductions_0d22166e-94d4-4479-a24d-4d0cbaacaba2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesBalance_8daf5393-46d7-427a-a51a-a663470f315c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ValuationAllowancesAndReservesBalance"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ValuationAndQualifyingAccountsDisclosureTable_a3353f0b-3df6-41e9-9275-4b5cca5ca437" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ValuationAndQualifyingAccountsDisclosureTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_srt_ValuationAndQualifyingAccountsDisclosureLineItems_8a25e3c2-5f2a-4f80-aedc-626b713f8ba0" xlink:to="loc_srt_ValuationAndQualifyingAccountsDisclosureTable_a3353f0b-3df6-41e9-9275-4b5cca5ca437" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_1e680be9-361c-478c-b12a-913dc39b33bc" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ValuationAllowancesAndReservesTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_ValuationAndQualifyingAccountsDisclosureTable_a3353f0b-3df6-41e9-9275-4b5cca5ca437" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_1e680be9-361c-478c-b12a-913dc39b33bc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDomain_1e680be9-361c-478c-b12a-913dc39b33bc_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ValuationAllowancesAndReservesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_1e680be9-361c-478c-b12a-913dc39b33bc" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDomain_1e680be9-361c-478c-b12a-913dc39b33bc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDomain_206b852f-ee6c-4329-a462-347c721f603d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ValuationAllowancesAndReservesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_1e680be9-361c-478c-b12a-913dc39b33bc" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDomain_206b852f-ee6c-4329-a462-347c721f603d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowanceOfDeferredTaxAssetsMember_a6b88a38-b309-4074-aae2-95e3aa1e98dd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ValuationAllowanceOfDeferredTaxAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesDomain_206b852f-ee6c-4329-a462-347c721f603d" xlink:to="loc_us-gaap_ValuationAllowanceOfDeferredTaxAssetsMember_a6b88a38-b309-4074-aae2-95e3aa1e98dd" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="simple" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-roles-2022.xsd#eedm"/>
  <link:definitionLink xlink:role="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LiabilitiesCurrentAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccruedLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrent" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetsAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsCurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherAssetsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract" xlink:to="loc_us-gaap_OtherAssetsCurrent" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LiabilitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrent" xlink:type="arc" order="1"/>
  </link:definitionLink>
</link:linkbase>
