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

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2021 Workiva-->
<!--r:07e03a3e-4ef9-41ba-bc94-3a0c49a9ec87,g:3b2fe96d-112b-45b6-a2c0-af14cb888e9e-->
<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.jabil.com/role/CONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY" xlink:type="simple" xlink:href="jbl-20210831.xsd#CONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY"/>
  <link:definitionLink xlink:role="http://www.jabil.com/role/CONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY" xlink:type="extended" id="i1f72bba00f5f40e6951cdbee2220764f_CONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_85ba8e7d-46d8-4938-9f39-17201f555c72" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_5978722d-9f65-4f3f-9d13-7c9cae6d356b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_85ba8e7d-46d8-4938-9f39-17201f555c72" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_5978722d-9f65-4f3f-9d13-7c9cae6d356b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_a5b0e2d9-96fb-4543-9cd5-9daeeaf67f54" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_5978722d-9f65-4f3f-9d13-7c9cae6d356b" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_a5b0e2d9-96fb-4543-9cd5-9daeeaf67f54" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_e4d910e1-346c-4270-90bf-7b4951364efc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_5978722d-9f65-4f3f-9d13-7c9cae6d356b" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_e4d910e1-346c-4270-90bf-7b4951364efc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireAdditionalInterestInSubsidiaries_4f15de0f-71d3-4877-a3d7-31cab05a907a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsToAcquireAdditionalInterestInSubsidiaries"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_5978722d-9f65-4f3f-9d13-7c9cae6d356b" xlink:to="loc_us-gaap_PaymentsToAcquireAdditionalInterestInSubsidiaries_4f15de0f-71d3-4877-a3d7-31cab05a907a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_a7f85676-cbbd-43c8-9efd-f8a5a5a32d10" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_5978722d-9f65-4f3f-9d13-7c9cae6d356b" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_a7f85676-cbbd-43c8-9efd-f8a5a5a32d10" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCommonStockCash_685ff13a-bc8d-4edb-82a0-9e6e94fc23ed" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DividendsCommonStockCash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_5978722d-9f65-4f3f-9d13-7c9cae6d356b" xlink:to="loc_us-gaap_DividendsCommonStockCash_685ff13a-bc8d-4edb-82a0-9e6e94fc23ed" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_58499f8c-4822-4842-9c15-4284169e1017" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_5978722d-9f65-4f3f-9d13-7c9cae6d356b" xlink:to="loc_us-gaap_ProfitLoss_58499f8c-4822-4842-9c15-4284169e1017" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_a7883bdc-578e-4c91-a9e7-11af11865b56" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_5978722d-9f65-4f3f-9d13-7c9cae6d356b" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_a7883bdc-578e-4c91-a9e7-11af11865b56" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_6a3380ca-f2d2-467f-b0f5-d26dfed621fb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_5978722d-9f65-4f3f-9d13-7c9cae6d356b" xlink:to="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_6a3380ca-f2d2-467f-b0f5-d26dfed621fb" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_7153d01a-fd28-4c50-9374-82e4f5ae5481" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TreasuryStockValueAcquiredCostMethod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_5978722d-9f65-4f3f-9d13-7c9cae6d356b" xlink:to="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_7153d01a-fd28-4c50-9374-82e4f5ae5481" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncontrollingInterestIncreaseFromBusinessCombination_5a1bf0f6-cce4-4e26-8661-8ee233a572fa" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NoncontrollingInterestIncreaseFromBusinessCombination"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_5978722d-9f65-4f3f-9d13-7c9cae6d356b" xlink:to="loc_us-gaap_NoncontrollingInterestIncreaseFromBusinessCombination_5a1bf0f6-cce4-4e26-8661-8ee233a572fa" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncontrollingInterestDecreaseFromDeconsolidation_a4f9eb5f-8192-4bfb-acab-aba8c88c374f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NoncontrollingInterestDecreaseFromDeconsolidation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_5978722d-9f65-4f3f-9d13-7c9cae6d356b" xlink:to="loc_us-gaap_NoncontrollingInterestDecreaseFromDeconsolidation_a4f9eb5f-8192-4bfb-acab-aba8c88c374f" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_d71ab19e-5f8f-4059-8e6a-4122255246b3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_5978722d-9f65-4f3f-9d13-7c9cae6d356b" xlink:to="loc_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_d71ab19e-5f8f-4059-8e6a-4122255246b3" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_55fcb9fc-7bd4-4ff9-8fee-29a964bc0dd6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_cd088a29-0eb1-4560-ac9e-158ca4485045" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_85ba8e7d-46d8-4938-9f39-17201f555c72" xlink:to="loc_us-gaap_StatementTable_cd088a29-0eb1-4560-ac9e-158ca4485045" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_cfc1623f-ac26-411f-90d5-e97d73e17691" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_cd088a29-0eb1-4560-ac9e-158ca4485045" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_cfc1623f-ac26-411f-90d5-e97d73e17691" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_cfc1623f-ac26-411f-90d5-e97d73e17691_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_cfc1623f-ac26-411f-90d5-e97d73e17691" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_cfc1623f-ac26-411f-90d5-e97d73e17691_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_0d4d0376-56b7-4829-ae48-02330870d12d" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_cfc1623f-ac26-411f-90d5-e97d73e17691" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_0d4d0376-56b7-4829-ae48-02330870d12d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_9b66a8be-629f-49b7-a747-274d24711790" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_0d4d0376-56b7-4829-ae48-02330870d12d" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_9b66a8be-629f-49b7-a747-274d24711790" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_2eb21b3c-53f0-4343-8a65-4f035ae88704" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_cd088a29-0eb1-4560-ac9e-158ca4485045" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_2eb21b3c-53f0-4343-8a65-4f035ae88704" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_2eb21b3c-53f0-4343-8a65-4f035ae88704_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_2eb21b3c-53f0-4343-8a65-4f035ae88704" xlink:to="loc_us-gaap_EquityComponentDomain_2eb21b3c-53f0-4343-8a65-4f035ae88704_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_6a99881d-b348-4759-83d6-d25918179da7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_2eb21b3c-53f0-4343-8a65-4f035ae88704" xlink:to="loc_us-gaap_EquityComponentDomain_6a99881d-b348-4759-83d6-d25918179da7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_84af8be3-9806-42d3-a5f8-f3347912ac9b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_6a99881d-b348-4759-83d6-d25918179da7" xlink:to="loc_us-gaap_CommonStockMember_84af8be3-9806-42d3-a5f8-f3347912ac9b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_ba662c00-7350-4e86-9d70-99c8d585f8ea" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_6a99881d-b348-4759-83d6-d25918179da7" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_ba662c00-7350-4e86-9d70-99c8d585f8ea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_d8189563-689f-484f-a4e0-0ac1e9d90632" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_6a99881d-b348-4759-83d6-d25918179da7" xlink:to="loc_us-gaap_RetainedEarningsMember_d8189563-689f-484f-a4e0-0ac1e9d90632" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_92a8cd21-d1d5-4b6d-8fd4-9073d6cc2d9d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_6a99881d-b348-4759-83d6-d25918179da7" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_92a8cd21-d1d5-4b6d-8fd4-9073d6cc2d9d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockMember_3171d161-224d-43c7-b16b-e62b2b249d78" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TreasuryStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_6a99881d-b348-4759-83d6-d25918179da7" xlink:to="loc_us-gaap_TreasuryStockMember_3171d161-224d-43c7-b16b-e62b2b249d78" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncontrollingInterestMember_d03734fd-7335-42bd-ac98-6806fe89a466" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NoncontrollingInterestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_6a99881d-b348-4759-83d6-d25918179da7" xlink:to="loc_us-gaap_NoncontrollingInterestMember_d03734fd-7335-42bd-ac98-6806fe89a466" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jabil.com/role/DescriptionofBusinessandSummaryofSignificantAccountingPoliciesFulfillmentCostsDetails" xlink:type="simple" xlink:href="jbl-20210831.xsd#DescriptionofBusinessandSummaryofSignificantAccountingPoliciesFulfillmentCostsDetails"/>
  <link:definitionLink xlink:role="http://www.jabil.com/role/DescriptionofBusinessandSummaryofSignificantAccountingPoliciesFulfillmentCostsDetails" xlink:type="extended" id="ib14140b360b84965b496b1e7083a38bb_DescriptionofBusinessandSummaryofSignificantAccountingPoliciesFulfillmentCostsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_b63c9aec-c334-45cb-a0cf-4e16f38f1f68" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizedContractCostAmortizationPeriod_769ba42a-6ada-4306-afaa-f75647714ed4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CapitalizedContractCostAmortizationPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_b63c9aec-c334-45cb-a0cf-4e16f38f1f68" xlink:to="loc_us-gaap_CapitalizedContractCostAmortizationPeriod_769ba42a-6ada-4306-afaa-f75647714ed4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizedContractCostNet_c8a1a06b-f289-4645-b3a7-76e49301e43a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CapitalizedContractCostNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_b63c9aec-c334-45cb-a0cf-4e16f38f1f68" xlink:to="loc_us-gaap_CapitalizedContractCostNet_c8a1a06b-f289-4645-b3a7-76e49301e43a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizedContractCostAmortization_2cc3a16a-88fb-4170-8d2f-60ef7cd83f73" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CapitalizedContractCostAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_b63c9aec-c334-45cb-a0cf-4e16f38f1f68" xlink:to="loc_us-gaap_CapitalizedContractCostAmortization_2cc3a16a-88fb-4170-8d2f-60ef7cd83f73" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizedContractCostImpairmentLoss_20ba9e5e-5115-4594-8ebf-f4738aefd582" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CapitalizedContractCostImpairmentLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_b63c9aec-c334-45cb-a0cf-4e16f38f1f68" xlink:to="loc_us-gaap_CapitalizedContractCostImpairmentLoss_20ba9e5e-5115-4594-8ebf-f4738aefd582" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_7c9a0740-a3bb-4ee9-8c21-e88183820d4b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_b63c9aec-c334-45cb-a0cf-4e16f38f1f68" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_7c9a0740-a3bb-4ee9-8c21-e88183820d4b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_9b3fc5c4-2849-4d69-a7a0-18334573f77d" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_7c9a0740-a3bb-4ee9-8c21-e88183820d4b" xlink:to="loc_srt_RangeAxis_9b3fc5c4-2849-4d69-a7a0-18334573f77d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_9b3fc5c4-2849-4d69-a7a0-18334573f77d_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_9b3fc5c4-2849-4d69-a7a0-18334573f77d" xlink:to="loc_srt_RangeMember_9b3fc5c4-2849-4d69-a7a0-18334573f77d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_20983083-7256-44cc-a9b4-b699cd7f858a" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_9b3fc5c4-2849-4d69-a7a0-18334573f77d" xlink:to="loc_srt_RangeMember_20983083-7256-44cc-a9b4-b699cd7f858a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_b2014da4-a019-4a34-9f92-b0e33b097873" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_20983083-7256-44cc-a9b4-b699cd7f858a" xlink:to="loc_srt_MinimumMember_b2014da4-a019-4a34-9f92-b0e33b097873" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_3cb216fc-2c19-476f-a39e-f24ac3360193" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_20983083-7256-44cc-a9b4-b699cd7f858a" xlink:to="loc_srt_MaximumMember_3cb216fc-2c19-476f-a39e-f24ac3360193" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jabil.com/role/DescriptionofBusinessandSummaryofSignificantAccountingPoliciesPropertyPlantandEquipmentnetDetails" xlink:type="simple" xlink:href="jbl-20210831.xsd#DescriptionofBusinessandSummaryofSignificantAccountingPoliciesPropertyPlantandEquipmentnetDetails"/>
  <link:definitionLink xlink:role="http://www.jabil.com/role/DescriptionofBusinessandSummaryofSignificantAccountingPoliciesPropertyPlantandEquipmentnetDetails" xlink:type="extended" id="ic90fde9ee5a6482a95621e3671a8ce4a_DescriptionofBusinessandSummaryofSignificantAccountingPoliciesPropertyPlantandEquipmentnetDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_f2210d53-6d14-43a0-a359-7eab5ff8c1bb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_29af2916-056b-44d0-8e5b-2cf73f47fc0a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_f2210d53-6d14-43a0-a359-7eab5ff8c1bb" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_29af2916-056b-44d0-8e5b-2cf73f47fc0a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_0a156e66-827b-48e6-ae11-d2130953fa31" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_f2210d53-6d14-43a0-a359-7eab5ff8c1bb" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_0a156e66-827b-48e6-ae11-d2130953fa31" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_8c905cda-46a4-4ba4-a9a0-6e2ad8a6a155" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_0a156e66-827b-48e6-ae11-d2130953fa31" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_8c905cda-46a4-4ba4-a9a0-6e2ad8a6a155" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_8c905cda-46a4-4ba4-a9a0-6e2ad8a6a155_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_8c905cda-46a4-4ba4-a9a0-6e2ad8a6a155" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_8c905cda-46a4-4ba4-a9a0-6e2ad8a6a155_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_044d599b-dbb5-4f79-8c05-81667964cfec" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_8c905cda-46a4-4ba4-a9a0-6e2ad8a6a155" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_044d599b-dbb5-4f79-8c05-81667964cfec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BuildingMember_5aaae764-2510-4b3f-ac87-588ad29b8d5f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BuildingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_044d599b-dbb5-4f79-8c05-81667964cfec" xlink:to="loc_us-gaap_BuildingMember_5aaae764-2510-4b3f-ac87-588ad29b8d5f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MachineryAndEquipmentMember_61ec19a0-85c7-41a1-92cb-4ecd071267b1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_MachineryAndEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_044d599b-dbb5-4f79-8c05-81667964cfec" xlink:to="loc_us-gaap_MachineryAndEquipmentMember_61ec19a0-85c7-41a1-92cb-4ecd071267b1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FurnitureAndFixturesMember_7787b17f-eedd-409e-8ee1-8feb83bb3094" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FurnitureAndFixturesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_044d599b-dbb5-4f79-8c05-81667964cfec" xlink:to="loc_us-gaap_FurnitureAndFixturesMember_7787b17f-eedd-409e-8ee1-8feb83bb3094" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_ComputerHardwareAndSoftwareMember_5409b9cc-9e87-48f7-ab22-32bb86b672bd" xlink:href="jbl-20210831.xsd#jbl_ComputerHardwareAndSoftwareMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_044d599b-dbb5-4f79-8c05-81667964cfec" xlink:to="loc_jbl_ComputerHardwareAndSoftwareMember_5409b9cc-9e87-48f7-ab22-32bb86b672bd" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransportationEquipmentMember_24143a88-1230-4d94-8ba3-dfce2bf2b708" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TransportationEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_044d599b-dbb5-4f79-8c05-81667964cfec" xlink:to="loc_us-gaap_TransportationEquipmentMember_24143a88-1230-4d94-8ba3-dfce2bf2b708" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_a2bd4b58-d062-42a8-8b29-50727088f471" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_0a156e66-827b-48e6-ae11-d2130953fa31" xlink:to="loc_srt_RangeAxis_a2bd4b58-d062-42a8-8b29-50727088f471" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_a2bd4b58-d062-42a8-8b29-50727088f471_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_a2bd4b58-d062-42a8-8b29-50727088f471" xlink:to="loc_srt_RangeMember_a2bd4b58-d062-42a8-8b29-50727088f471_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_1832a1fb-33d9-4e04-a824-e3d6ef180b3a" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_a2bd4b58-d062-42a8-8b29-50727088f471" xlink:to="loc_srt_RangeMember_1832a1fb-33d9-4e04-a824-e3d6ef180b3a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_39417563-c691-4cd3-a8a4-c743b070ead2" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_1832a1fb-33d9-4e04-a824-e3d6ef180b3a" xlink:to="loc_srt_MinimumMember_39417563-c691-4cd3-a8a4-c743b070ead2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_638cb54e-9341-432c-bd1c-af6a85274e50" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_1832a1fb-33d9-4e04-a824-e3d6ef180b3a" xlink:to="loc_srt_MaximumMember_638cb54e-9341-432c-bd1c-af6a85274e50" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jabil.com/role/DescriptionofBusinessandSummaryofSignificantAccountingPoliciesLeasesDetails" xlink:type="simple" xlink:href="jbl-20210831.xsd#DescriptionofBusinessandSummaryofSignificantAccountingPoliciesLeasesDetails"/>
  <link:definitionLink xlink:role="http://www.jabil.com/role/DescriptionofBusinessandSummaryofSignificantAccountingPoliciesLeasesDetails" xlink:type="extended" id="ia5a93513954144dea4d3ea5b480a2c8a_DescriptionofBusinessandSummaryofSignificantAccountingPoliciesLeasesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_a900d50e-022a-42d8-be5a-26f6832b3465" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeLeaseDescriptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseTermOfContract_5db5a547-9fd0-4359-8424-a15ad799ff1b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeOperatingLeaseTermOfContract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_a900d50e-022a-42d8-be5a-26f6832b3465" xlink:to="loc_us-gaap_LesseeOperatingLeaseTermOfContract_5db5a547-9fd0-4359-8424-a15ad799ff1b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_8d0a6c42-1a4e-434d-893b-854f0cc7d5e5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeLeaseDescriptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_a900d50e-022a-42d8-be5a-26f6832b3465" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_8d0a6c42-1a4e-434d-893b-854f0cc7d5e5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_273f7cca-d19e-4541-9c2f-7f8fc4151945" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_8d0a6c42-1a4e-434d-893b-854f0cc7d5e5" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_273f7cca-d19e-4541-9c2f-7f8fc4151945" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_273f7cca-d19e-4541-9c2f-7f8fc4151945_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_273f7cca-d19e-4541-9c2f-7f8fc4151945" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_273f7cca-d19e-4541-9c2f-7f8fc4151945_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_7f0948b1-d88f-406f-8400-b70eac50f92f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_273f7cca-d19e-4541-9c2f-7f8fc4151945" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_7f0948b1-d88f-406f-8400-b70eac50f92f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_BuildingsRealEstateMachineryAndEquipmentMember_378ce6c3-dae9-4d6d-b073-7b475d2a1d4e" xlink:href="jbl-20210831.xsd#jbl_BuildingsRealEstateMachineryAndEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_7f0948b1-d88f-406f-8400-b70eac50f92f" xlink:to="loc_jbl_BuildingsRealEstateMachineryAndEquipmentMember_378ce6c3-dae9-4d6d-b073-7b475d2a1d4e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_a8102658-d024-4da1-8cfd-f0ecef65ae1d" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_8d0a6c42-1a4e-434d-893b-854f0cc7d5e5" xlink:to="loc_srt_RangeAxis_a8102658-d024-4da1-8cfd-f0ecef65ae1d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_a8102658-d024-4da1-8cfd-f0ecef65ae1d_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_a8102658-d024-4da1-8cfd-f0ecef65ae1d" xlink:to="loc_srt_RangeMember_a8102658-d024-4da1-8cfd-f0ecef65ae1d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_6a1161d4-d0d1-4666-880f-e99d6e651e7e" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_a8102658-d024-4da1-8cfd-f0ecef65ae1d" xlink:to="loc_srt_RangeMember_6a1161d4-d0d1-4666-880f-e99d6e651e7e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_2a154cbb-113c-462c-a366-ab1198535911" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_6a1161d4-d0d1-4666-880f-e99d6e651e7e" xlink:to="loc_srt_MinimumMember_2a154cbb-113c-462c-a366-ab1198535911" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_164793b3-93bc-4f8b-8f6b-5648b0cf572b" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_6a1161d4-d0d1-4666-880f-e99d6e651e7e" xlink:to="loc_srt_MaximumMember_164793b3-93bc-4f8b-8f6b-5648b0cf572b" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jabil.com/role/DescriptionofBusinessandSummaryofSignificantAccountingPoliciesChangeinAOCINetofTaxDetails" xlink:type="simple" xlink:href="jbl-20210831.xsd#DescriptionofBusinessandSummaryofSignificantAccountingPoliciesChangeinAOCINetofTaxDetails"/>
  <link:definitionLink xlink:role="http://www.jabil.com/role/DescriptionofBusinessandSummaryofSignificantAccountingPoliciesChangeinAOCINetofTaxDetails" xlink:type="extended" id="i393dfa7d258c413a8efceb8057240e20_DescriptionofBusinessandSummaryofSignificantAccountingPoliciesChangeinAOCINetofTaxDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_a912fa25-d2d3-4375-b8c5-8cb9e3f3a98b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_ff1738d1-9996-4911-aca3-75ce724f27f4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_a912fa25-d2d3-4375-b8c5-8cb9e3f3a98b" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_ff1738d1-9996-4911-aca3-75ce724f27f4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_f4a3123e-677f-411f-8d83-9543de2529d8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_ff1738d1-9996-4911-aca3-75ce724f27f4" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_f4a3123e-677f-411f-8d83-9543de2529d8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_41249fe6-b554-4254-ba58-96665add0881" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_ff1738d1-9996-4911-aca3-75ce724f27f4" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_41249fe6-b554-4254-ba58-96665add0881" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_7ac7de04-322b-456c-ad45-be1644a86678" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_ff1738d1-9996-4911-aca3-75ce724f27f4" xlink:to="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_7ac7de04-322b-456c-ad45-be1644a86678" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_fb3c2645-65da-4cad-8eb9-0acca21c6fa1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_ff1738d1-9996-4911-aca3-75ce724f27f4" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_fb3c2645-65da-4cad-8eb9-0acca21c6fa1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_af22966b-4db8-456c-bc01-25b95a176aae" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_e2f57b5e-f2ca-45c4-81e3-10b3b88fb4c7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_a912fa25-d2d3-4375-b8c5-8cb9e3f3a98b" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_e2f57b5e-f2ca-45c4-81e3-10b3b88fb4c7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_d083563b-7b4a-4975-a6b2-baa18d4f5a3e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_e2f57b5e-f2ca-45c4-81e3-10b3b88fb4c7" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_d083563b-7b4a-4975-a6b2-baa18d4f5a3e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_d083563b-7b4a-4975-a6b2-baa18d4f5a3e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_d083563b-7b4a-4975-a6b2-baa18d4f5a3e" xlink:to="loc_us-gaap_EquityComponentDomain_d083563b-7b4a-4975-a6b2-baa18d4f5a3e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_a2990c9e-37fa-4f72-a6b6-3776ad32288c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_d083563b-7b4a-4975-a6b2-baa18d4f5a3e" xlink:to="loc_us-gaap_EquityComponentDomain_a2990c9e-37fa-4f72-a6b6-3776ad32288c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedTranslationAdjustmentMember_1143638c-b8f1-496c-a085-9b1a52232180" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedTranslationAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_a2990c9e-37fa-4f72-a6b6-3776ad32288c" xlink:to="loc_us-gaap_AccumulatedTranslationAdjustmentMember_1143638c-b8f1-496c-a085-9b1a52232180" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember_088df4e6-c6b6-4a49-957f-4ba1b2577d9a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_a2990c9e-37fa-4f72-a6b6-3776ad32288c" xlink:to="loc_us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember_088df4e6-c6b6-4a49-957f-4ba1b2577d9a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMember_125af1a5-46ef-4c78-95a5-ea098b0c1b20" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_a2990c9e-37fa-4f72-a6b6-3776ad32288c" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMember_125af1a5-46ef-4c78-95a5-ea098b0c1b20" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMember_8411b439-a2c5-43f9-a608-0ae19ae9d7de" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_a2990c9e-37fa-4f72-a6b6-3776ad32288c" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMember_8411b439-a2c5-43f9-a608-0ae19ae9d7de" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_8ea177ff-c2c8-469b-a6ce-88a94a0bba84" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_a2990c9e-37fa-4f72-a6b6-3776ad32288c" xlink:to="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_8ea177ff-c2c8-469b-a6ce-88a94a0bba84" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_3aa1241a-fb73-4ce5-950d-187dd3381fe7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_a2990c9e-37fa-4f72-a6b6-3776ad32288c" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_3aa1241a-fb73-4ce5-950d-187dd3381fe7" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jabil.com/role/DescriptionofBusinessandSummaryofSignificantAccountingPoliciesReclassificationfromAOCIDetails" xlink:type="simple" xlink:href="jbl-20210831.xsd#DescriptionofBusinessandSummaryofSignificantAccountingPoliciesReclassificationfromAOCIDetails"/>
  <link:definitionLink xlink:role="http://www.jabil.com/role/DescriptionofBusinessandSummaryofSignificantAccountingPoliciesReclassificationfromAOCIDetails" xlink:type="extended" id="id34cc56cc5e0418b856e193b58870daa_DescriptionofBusinessandSummaryofSignificantAccountingPoliciesReclassificationfromAOCIDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeOnDerivativesLineItems_9888919b-42d8-4f99-b467-b695e80539c7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeOnDerivativesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPeriodIncreaseDecreaseAbstract_59a7fc82-0792-4b18-aa12-75fb78a698f8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPeriodIncreaseDecreaseAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeOnDerivativesLineItems_9888919b-42d8-4f99-b467-b695e80539c7" xlink:to="loc_us-gaap_OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPeriodIncreaseDecreaseAbstract_59a7fc82-0792-4b18-aa12-75fb78a698f8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_4a92f2fb-1c96-418e-a605-ca18baf991fb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPeriodIncreaseDecreaseAbstract_59a7fc82-0792-4b18-aa12-75fb78a698f8" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_4a92f2fb-1c96-418e-a605-ca18baf991fb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpense_ab591342-aad4-445e-8da7-fd2505c7263d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InterestExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPeriodIncreaseDecreaseAbstract_59a7fc82-0792-4b18-aa12-75fb78a698f8" xlink:to="loc_us-gaap_InterestExpense_ab591342-aad4-445e-8da7-fd2505c7263d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_2cdb919a-935c-4c4e-8718-d7de45c636bc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeOnDerivativesLineItems_9888919b-42d8-4f99-b467-b695e80539c7" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_2cdb919a-935c-4c4e-8718-d7de45c636bc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_65701ab3-eddf-4d93-b924-d9e26eb8cef3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeOnDerivativesLineItems_9888919b-42d8-4f99-b467-b695e80539c7" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_65701ab3-eddf-4d93-b924-d9e26eb8cef3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_GainLossOnSecurities_e3a5627d-c9e6-477d-aa2c-7293eefbc1ed" xlink:href="jbl-20210831.xsd#jbl_GainLossOnSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeOnDerivativesLineItems_9888919b-42d8-4f99-b467-b695e80539c7" xlink:to="loc_jbl_GainLossOnSecurities_e3a5627d-c9e6-477d-aa2c-7293eefbc1ed" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_1b6c1f2a-7dfa-490f-8f65-16e916c3778e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeOnDerivativesLineItems_9888919b-42d8-4f99-b467-b695e80539c7" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_1b6c1f2a-7dfa-490f-8f65-16e916c3778e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths_4c326b35-7d63-410b-8b50-9d276469a08b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeOnDerivativesLineItems_9888919b-42d8-4f99-b467-b695e80539c7" xlink:to="loc_us-gaap_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths_4c326b35-7d63-410b-8b50-9d276469a08b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_32df74ce-5681-4c94-9ec2-06ae87636ccc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeOnDerivativesLineItems_9888919b-42d8-4f99-b467-b695e80539c7" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_32df74ce-5681-4c94-9ec2-06ae87636ccc" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_0f455306-3394-441d-bafc-b853ba13091a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_32df74ce-5681-4c94-9ec2-06ae87636ccc" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_0f455306-3394-441d-bafc-b853ba13091a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_0f455306-3394-441d-bafc-b853ba13091a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_0f455306-3394-441d-bafc-b853ba13091a" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_0f455306-3394-441d-bafc-b853ba13091a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_d41850a8-8f6b-4278-ac55-2f73afa0f6cf" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_0f455306-3394-441d-bafc-b853ba13091a" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_d41850a8-8f6b-4278-ac55-2f73afa0f6cf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_8f7a430f-b318-4bdd-a0c0-5fdfb1bf03b2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_d41850a8-8f6b-4278-ac55-2f73afa0f6cf" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_8f7a430f-b318-4bdd-a0c0-5fdfb1bf03b2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_9bddeb3f-05de-4796-a11d-0dd63d3409d7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_32df74ce-5681-4c94-9ec2-06ae87636ccc" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_9bddeb3f-05de-4796-a11d-0dd63d3409d7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_9bddeb3f-05de-4796-a11d-0dd63d3409d7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_9bddeb3f-05de-4796-a11d-0dd63d3409d7" xlink:to="loc_us-gaap_EquityComponentDomain_9bddeb3f-05de-4796-a11d-0dd63d3409d7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_aced5c50-60d6-4ae0-b37e-6470db39bf38" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_9bddeb3f-05de-4796-a11d-0dd63d3409d7" xlink:to="loc_us-gaap_EquityComponentDomain_aced5c50-60d6-4ae0-b37e-6470db39bf38" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember_2a2592f6-e840-49c8-9511-32651a5b87fc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_aced5c50-60d6-4ae0-b37e-6470db39bf38" xlink:to="loc_us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember_2a2592f6-e840-49c8-9511-32651a5b87fc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMember_01b311a5-29f8-43be-ac2e-f3a0c1ab75e3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_aced5c50-60d6-4ae0-b37e-6470db39bf38" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMember_01b311a5-29f8-43be-ac2e-f3a0c1ab75e3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_b7b09ce5-9e3b-4e14-b5e7-cd432127f036" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_aced5c50-60d6-4ae0-b37e-6470db39bf38" xlink:to="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_b7b09ce5-9e3b-4e14-b5e7-cd432127f036" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMember_d9016cc2-0151-49ce-ba42-4dd0fa1e30da" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_aced5c50-60d6-4ae0-b37e-6470db39bf38" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMember_d9016cc2-0151-49ce-ba42-4dd0fa1e30da" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_d317e04d-fecc-45cf-92d7-d45f20b34fa6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_32df74ce-5681-4c94-9ec2-06ae87636ccc" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_d317e04d-fecc-45cf-92d7-d45f20b34fa6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_d317e04d-fecc-45cf-92d7-d45f20b34fa6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_d317e04d-fecc-45cf-92d7-d45f20b34fa6" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_d317e04d-fecc-45cf-92d7-d45f20b34fa6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_3979b2e3-413c-4fa5-aefc-9b14f053a52e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_d317e04d-fecc-45cf-92d7-d45f20b34fa6" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_3979b2e3-413c-4fa5-aefc-9b14f053a52e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeContractMember_d2ba9a20-4943-4bc3-b186-750206bc9d7d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ForeignExchangeContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_3979b2e3-413c-4fa5-aefc-9b14f053a52e" xlink:to="loc_us-gaap_ForeignExchangeContractMember_d2ba9a20-4943-4bc3-b186-750206bc9d7d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateContractMember_f8d5a58b-bc59-42ba-8d94-31efcdefb669" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InterestRateContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_3979b2e3-413c-4fa5-aefc-9b14f053a52e" xlink:to="loc_us-gaap_InterestRateContractMember_f8d5a58b-bc59-42ba-8d94-31efcdefb669" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jabil.com/role/DescriptionofBusinessandSummaryofSignificantAccountingPoliciesEarningsPerShareDetails" xlink:type="simple" xlink:href="jbl-20210831.xsd#DescriptionofBusinessandSummaryofSignificantAccountingPoliciesEarningsPerShareDetails"/>
  <link:definitionLink xlink:role="http://www.jabil.com/role/DescriptionofBusinessandSummaryofSignificantAccountingPoliciesEarningsPerShareDetails" xlink:type="extended" id="i74288f50ae1d4e5f8b8a49ad2de1a5fb_DescriptionofBusinessandSummaryofSignificantAccountingPoliciesEarningsPerShareDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_9994a2ee-a375-4002-bb75-52dc9e3a35b5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_ddbf84d2-69b5-4620-8417-30cc4bd06ece" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_9994a2ee-a375-4002-bb75-52dc9e3a35b5" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_ddbf84d2-69b5-4620-8417-30cc4bd06ece" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_cc61e67c-94d7-4b5d-91fc-3645736bab6e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_9994a2ee-a375-4002-bb75-52dc9e3a35b5" xlink:to="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_cc61e67c-94d7-4b5d-91fc-3645736bab6e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_c73bd02d-95b8-4e9a-97e6-46d6e001073b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_cc61e67c-94d7-4b5d-91fc-3645736bab6e" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_c73bd02d-95b8-4e9a-97e6-46d6e001073b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_c73bd02d-95b8-4e9a-97e6-46d6e001073b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_c73bd02d-95b8-4e9a-97e6-46d6e001073b" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_c73bd02d-95b8-4e9a-97e6-46d6e001073b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_7f14a3c9-1e4b-47d5-857b-455a412c8428" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_c73bd02d-95b8-4e9a-97e6-46d6e001073b" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_7f14a3c9-1e4b-47d5-857b-455a412c8428" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_df6f5368-66fc-470d-9955-994490c7baa9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_7f14a3c9-1e4b-47d5-857b-455a412c8428" xlink:to="loc_us-gaap_RestrictedStockMember_df6f5368-66fc-470d-9955-994490c7baa9" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jabil.com/role/TradeAccountsReceivableSaleProgramsTradeAccountsReceivableSaleProgramsKeyTermsDetails" xlink:type="simple" xlink:href="jbl-20210831.xsd#TradeAccountsReceivableSaleProgramsTradeAccountsReceivableSaleProgramsKeyTermsDetails"/>
  <link:definitionLink xlink:role="http://www.jabil.com/role/TradeAccountsReceivableSaleProgramsTradeAccountsReceivableSaleProgramsKeyTermsDetails" xlink:type="extended" id="ifde529d9d62540679eeed91b86789200_TradeAccountsReceivableSaleProgramsTradeAccountsReceivableSaleProgramsKeyTermsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_jbl_TradeAccountsReceivableSecuritizationAndSaleProgramLineItems_16b9d489-4aa2-4bb1-b225-1edcfd175b1b" xlink:href="jbl-20210831.xsd#jbl_TradeAccountsReceivableSecuritizationAndSaleProgramLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_NetCashProceedsAvailableAtAnyOneTimeUnderSalesProgram_7ffca9bc-9799-4150-a83a-56526d0ed142" xlink:href="jbl-20210831.xsd#jbl_NetCashProceedsAvailableAtAnyOneTimeUnderSalesProgram"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_TradeAccountsReceivableSecuritizationAndSaleProgramLineItems_16b9d489-4aa2-4bb1-b225-1edcfd175b1b" xlink:to="loc_jbl_NetCashProceedsAvailableAtAnyOneTimeUnderSalesProgram_7ffca9bc-9799-4150-a83a-56526d0ed142" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_ThresholdPeriodToCancelForTradeAccountsReceivableSaleAgreementBeforeAutomaticExtension_3d43c728-5587-49b5-9948-9e22ffeb2ed7" xlink:href="jbl-20210831.xsd#jbl_ThresholdPeriodToCancelForTradeAccountsReceivableSaleAgreementBeforeAutomaticExtension"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_TradeAccountsReceivableSecuritizationAndSaleProgramLineItems_16b9d489-4aa2-4bb1-b225-1edcfd175b1b" xlink:to="loc_jbl_ThresholdPeriodToCancelForTradeAccountsReceivableSaleAgreementBeforeAutomaticExtension_3d43c728-5587-49b5-9948-9e22ffeb2ed7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_TradeAccountsReceivableSecuritizationAndSaleProgramTable_d0634bec-8def-441a-a1df-e17b74dc3f89" xlink:href="jbl-20210831.xsd#jbl_TradeAccountsReceivableSecuritizationAndSaleProgramTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_jbl_TradeAccountsReceivableSecuritizationAndSaleProgramLineItems_16b9d489-4aa2-4bb1-b225-1edcfd175b1b" xlink:to="loc_jbl_TradeAccountsReceivableSecuritizationAndSaleProgramTable_d0634bec-8def-441a-a1df-e17b74dc3f89" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleProgramTypeAxis_edd322be-c886-473f-ab68-6149fb47ace8" xlink:href="jbl-20210831.xsd#jbl_SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleProgramTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_jbl_TradeAccountsReceivableSecuritizationAndSaleProgramTable_d0634bec-8def-441a-a1df-e17b74dc3f89" xlink:to="loc_jbl_SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleProgramTypeAxis_edd322be-c886-473f-ab68-6149fb47ace8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleProgramTypeDomain_edd322be-c886-473f-ab68-6149fb47ace8_default" xlink:href="jbl-20210831.xsd#jbl_SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleProgramTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_jbl_SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleProgramTypeAxis_edd322be-c886-473f-ab68-6149fb47ace8" xlink:to="loc_jbl_SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleProgramTypeDomain_edd322be-c886-473f-ab68-6149fb47ace8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleProgramTypeDomain_fa8aab2e-b25d-4a4d-93c8-0e76702d84cf" xlink:href="jbl-20210831.xsd#jbl_SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleProgramTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_jbl_SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleProgramTypeAxis_edd322be-c886-473f-ab68-6149fb47ace8" xlink:to="loc_jbl_SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleProgramTypeDomain_fa8aab2e-b25d-4a4d-93c8-0e76702d84cf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_SixHundredMillionDollarTradeAccountsReceivableSaleProgramDueDecember52021Member_51949a1d-ace7-45b2-a9c2-f06d77798814" xlink:href="jbl-20210831.xsd#jbl_SixHundredMillionDollarTradeAccountsReceivableSaleProgramDueDecember52021Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleProgramTypeDomain_fa8aab2e-b25d-4a4d-93c8-0e76702d84cf" xlink:to="loc_jbl_SixHundredMillionDollarTradeAccountsReceivableSaleProgramDueDecember52021Member_51949a1d-ace7-45b2-a9c2-f06d77798814" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_OneHundredFiftyMillionDollarTradeAccountsReceivableSaleProgramMember_5a211290-d9b9-435b-b825-b833a1c62e2d" xlink:href="jbl-20210831.xsd#jbl_OneHundredFiftyMillionDollarTradeAccountsReceivableSaleProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleProgramTypeDomain_fa8aab2e-b25d-4a4d-93c8-0e76702d84cf" xlink:to="loc_jbl_OneHundredFiftyMillionDollarTradeAccountsReceivableSaleProgramMember_5a211290-d9b9-435b-b825-b833a1c62e2d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_FourHundredMillionCNYTradeAccountsReceivableSaleProgramMember_3a70101a-c549-44e8-b5ab-baffdcd464ea" xlink:href="jbl-20210831.xsd#jbl_FourHundredMillionCNYTradeAccountsReceivableSaleProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleProgramTypeDomain_fa8aab2e-b25d-4a4d-93c8-0e76702d84cf" xlink:to="loc_jbl_FourHundredMillionCNYTradeAccountsReceivableSaleProgramMember_3a70101a-c549-44e8-b5ab-baffdcd464ea" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_OneHundredFiftyMillionDollarTradeAccountsReceivableSaleProgramExpiringMay42023Member_6f2b8213-3737-481b-b35c-170efe3896cd" xlink:href="jbl-20210831.xsd#jbl_OneHundredFiftyMillionDollarTradeAccountsReceivableSaleProgramExpiringMay42023Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleProgramTypeDomain_fa8aab2e-b25d-4a4d-93c8-0e76702d84cf" xlink:to="loc_jbl_OneHundredFiftyMillionDollarTradeAccountsReceivableSaleProgramExpiringMay42023Member_6f2b8213-3737-481b-b35c-170efe3896cd" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_OneHundredFiftyMillionDollarTradeAccountsReceivableSaleProgramExpiringJanuary252022Member_662bfbf0-227c-49a6-9b1c-e11d7c763a08" xlink:href="jbl-20210831.xsd#jbl_OneHundredFiftyMillionDollarTradeAccountsReceivableSaleProgramExpiringJanuary252022Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleProgramTypeDomain_fa8aab2e-b25d-4a4d-93c8-0e76702d84cf" xlink:to="loc_jbl_OneHundredFiftyMillionDollarTradeAccountsReceivableSaleProgramExpiringJanuary252022Member_662bfbf0-227c-49a6-9b1c-e11d7c763a08" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_FiftyMillionDollarTradeAccountsReceivableSaleProgramExpiringFebruary232023Member_924844c1-dc7a-42bf-9f9a-934c517b87af" xlink:href="jbl-20210831.xsd#jbl_FiftyMillionDollarTradeAccountsReceivableSaleProgramExpiringFebruary232023Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleProgramTypeDomain_fa8aab2e-b25d-4a4d-93c8-0e76702d84cf" xlink:to="loc_jbl_FiftyMillionDollarTradeAccountsReceivableSaleProgramExpiringFebruary232023Member_924844c1-dc7a-42bf-9f9a-934c517b87af" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_OneHundredMillionDollarTradeAccountsReceivableSaleProgramExpiringAugust102022Member_f7417ceb-ad8b-47fd-a7bf-f1cfb355bd19" xlink:href="jbl-20210831.xsd#jbl_OneHundredMillionDollarTradeAccountsReceivableSaleProgramExpiringAugust102022Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleProgramTypeDomain_fa8aab2e-b25d-4a4d-93c8-0e76702d84cf" xlink:to="loc_jbl_OneHundredMillionDollarTradeAccountsReceivableSaleProgramExpiringAugust102022Member_f7417ceb-ad8b-47fd-a7bf-f1cfb355bd19" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_OneHundredMillionDollarTradeAccountsReceivableSaleProgramExpiringJuly212022Member_be16b33d-a576-465b-831d-0d172dcfea32" xlink:href="jbl-20210831.xsd#jbl_OneHundredMillionDollarTradeAccountsReceivableSaleProgramExpiringJuly212022Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleProgramTypeDomain_fa8aab2e-b25d-4a4d-93c8-0e76702d84cf" xlink:to="loc_jbl_OneHundredMillionDollarTradeAccountsReceivableSaleProgramExpiringJuly212022Member_be16b33d-a576-465b-831d-0d172dcfea32" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_FiveHundredFiftyMillionDollarTradeAccountsReceivableSaleProgramExpiringDecember42021Member_51cc1df3-222d-4686-a6e0-8939b92dbb09" xlink:href="jbl-20210831.xsd#jbl_FiveHundredFiftyMillionDollarTradeAccountsReceivableSaleProgramExpiringDecember42021Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleProgramTypeDomain_fa8aab2e-b25d-4a4d-93c8-0e76702d84cf" xlink:to="loc_jbl_FiveHundredFiftyMillionDollarTradeAccountsReceivableSaleProgramExpiringDecember42021Member_51cc1df3-222d-4686-a6e0-8939b92dbb09" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_OneHundredThirtyFiveMillionDollarTradeAccountsReceivableSaleProgramDueApril112022Member_db2214af-fd80-4489-ae09-3aa3650e916f" xlink:href="jbl-20210831.xsd#jbl_OneHundredThirtyFiveMillionDollarTradeAccountsReceivableSaleProgramDueApril112022Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleProgramTypeDomain_fa8aab2e-b25d-4a4d-93c8-0e76702d84cf" xlink:to="loc_jbl_OneHundredThirtyFiveMillionDollarTradeAccountsReceivableSaleProgramDueApril112022Member_db2214af-fd80-4489-ae09-3aa3650e916f" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_OneHundredMillionCHFTradeAccountsReceivableSaleProgramExpiringOnDecember52021Member_bc26fa17-ce97-4c11-aabc-73f973b2cfb7" xlink:href="jbl-20210831.xsd#jbl_OneHundredMillionCHFTradeAccountsReceivableSaleProgramExpiringOnDecember52021Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleProgramTypeDomain_fa8aab2e-b25d-4a4d-93c8-0e76702d84cf" xlink:to="loc_jbl_OneHundredMillionCHFTradeAccountsReceivableSaleProgramExpiringOnDecember52021Member_bc26fa17-ce97-4c11-aabc-73f973b2cfb7" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_NinetyMillionDollarTradeAccountsReceivableSaleProgramExpiringOnJanuary232022Member_9ce5d66c-97bd-46e3-9dcc-ae81982d34c7" xlink:href="jbl-20210831.xsd#jbl_NinetyMillionDollarTradeAccountsReceivableSaleProgramExpiringOnJanuary232022Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleProgramTypeDomain_fa8aab2e-b25d-4a4d-93c8-0e76702d84cf" xlink:to="loc_jbl_NinetyMillionDollarTradeAccountsReceivableSaleProgramExpiringOnJanuary232022Member_9ce5d66c-97bd-46e3-9dcc-ae81982d34c7" xlink:type="arc" order="11"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jabil.com/role/TradeAccountsReceivableSaleProgramsTradeAccountsReceivableSaleProgramsAmountsRecognizedDetails" xlink:type="simple" xlink:href="jbl-20210831.xsd#TradeAccountsReceivableSaleProgramsTradeAccountsReceivableSaleProgramsAmountsRecognizedDetails"/>
  <link:definitionLink xlink:role="http://www.jabil.com/role/TradeAccountsReceivableSaleProgramsTradeAccountsReceivableSaleProgramsAmountsRecognizedDetails" xlink:type="extended" id="i06cd748c42df4cd0b20cc89fbd2b454d_TradeAccountsReceivableSaleProgramsTradeAccountsReceivableSaleProgramsAmountsRecognizedDetails">
    <link:loc xlink:type="locator" xlink:label="loc_jbl_TradeAccountsReceivableSecuritizationAndSaleProgramLineItems_a35bb107-405e-4640-a8cc-6cb1ebe468c4" xlink:href="jbl-20210831.xsd#jbl_TradeAccountsReceivableSecuritizationAndSaleProgramLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_TradeAccountReceivableSold_3654cf27-b257-4713-af0d-77f68305de1c" xlink:href="jbl-20210831.xsd#jbl_TradeAccountReceivableSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_TradeAccountsReceivableSecuritizationAndSaleProgramLineItems_a35bb107-405e-4640-a8cc-6cb1ebe468c4" xlink:to="loc_jbl_TradeAccountReceivableSold_3654cf27-b257-4713-af0d-77f68305de1c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashFlowsBetweenTransfereeAndTransferorProceedsFromCollectionsReinvestedInRevolvingPeriodTransfers_1346b2fb-9dd7-4de5-9f0b-0d6cd59fef1f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CashFlowsBetweenTransfereeAndTransferorProceedsFromCollectionsReinvestedInRevolvingPeriodTransfers"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_TradeAccountsReceivableSecuritizationAndSaleProgramLineItems_a35bb107-405e-4640-a8cc-6cb1ebe468c4" xlink:to="loc_us-gaap_CashFlowsBetweenTransfereeAndTransferorProceedsFromCollectionsReinvestedInRevolvingPeriodTransfers_1346b2fb-9dd7-4de5-9f0b-0d6cd59fef1f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSaleOfAccountsReceivable_3efd34a5-9526-4cde-bbd9-32887d8dea02" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GainLossOnSaleOfAccountsReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_TradeAccountsReceivableSecuritizationAndSaleProgramLineItems_a35bb107-405e-4640-a8cc-6cb1ebe468c4" xlink:to="loc_us-gaap_GainLossOnSaleOfAccountsReceivable_3efd34a5-9526-4cde-bbd9-32887d8dea02" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_TradeAccountsReceivableSecuritizationAndSaleProgramTable_467bc450-4c59-4c36-9c5f-f0c588b09cf5" xlink:href="jbl-20210831.xsd#jbl_TradeAccountsReceivableSecuritizationAndSaleProgramTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_jbl_TradeAccountsReceivableSecuritizationAndSaleProgramLineItems_a35bb107-405e-4640-a8cc-6cb1ebe468c4" xlink:to="loc_jbl_TradeAccountsReceivableSecuritizationAndSaleProgramTable_467bc450-4c59-4c36-9c5f-f0c588b09cf5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_de1c4cc5-469e-4d6e-a778-8e2a4625ac44" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_jbl_TradeAccountsReceivableSecuritizationAndSaleProgramTable_467bc450-4c59-4c36-9c5f-f0c588b09cf5" xlink:to="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_de1c4cc5-469e-4d6e-a778-8e2a4625ac44" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivableTypeDomain_de1c4cc5-469e-4d6e-a778-8e2a4625ac44_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ReceivableTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_de1c4cc5-469e-4d6e-a778-8e2a4625ac44" xlink:to="loc_us-gaap_ReceivableTypeDomain_de1c4cc5-469e-4d6e-a778-8e2a4625ac44_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivableTypeDomain_a8058d8c-e1cc-49ee-bfbe-ab175bb41700" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ReceivableTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_de1c4cc5-469e-4d6e-a778-8e2a4625ac44" xlink:to="loc_us-gaap_ReceivableTypeDomain_a8058d8c-e1cc-49ee-bfbe-ab175bb41700" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_TradeAccountsReceivableSaleProgramsMember_2c604516-1c31-4995-8acb-1cc10f7b4963" xlink:href="jbl-20210831.xsd#jbl_TradeAccountsReceivableSaleProgramsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReceivableTypeDomain_a8058d8c-e1cc-49ee-bfbe-ab175bb41700" xlink:to="loc_jbl_TradeAccountsReceivableSaleProgramsMember_2c604516-1c31-4995-8acb-1cc10f7b4963" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jabil.com/role/PropertyPlantandEquipmentComponentsDetails" xlink:type="simple" xlink:href="jbl-20210831.xsd#PropertyPlantandEquipmentComponentsDetails"/>
  <link:definitionLink xlink:role="http://www.jabil.com/role/PropertyPlantandEquipmentComponentsDetails" xlink:type="extended" id="i415336145262475c9a4c296325cb8dbe_PropertyPlantandEquipmentComponentsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_740e537a-8994-4f80-bb8e-41083125bcae" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_497ed61d-b586-47be-94ff-c71747b6e7d8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_740e537a-8994-4f80-bb8e-41083125bcae" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_497ed61d-b586-47be-94ff-c71747b6e7d8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_55b84e6c-824e-42c8-bef5-310b07b748db" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_740e537a-8994-4f80-bb8e-41083125bcae" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_55b84e6c-824e-42c8-bef5-310b07b748db" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_005599d9-091c-4abb-ab77-417f0e8fac14" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_740e537a-8994-4f80-bb8e-41083125bcae" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_005599d9-091c-4abb-ab77-417f0e8fac14" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_e82dbb97-e166-4326-9e31-116ea8ae167a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_740e537a-8994-4f80-bb8e-41083125bcae" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_e82dbb97-e166-4326-9e31-116ea8ae167a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_032eec98-3eca-445a-96c6-f782eab950d2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_e82dbb97-e166-4326-9e31-116ea8ae167a" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_032eec98-3eca-445a-96c6-f782eab950d2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_032eec98-3eca-445a-96c6-f782eab950d2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_032eec98-3eca-445a-96c6-f782eab950d2" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_032eec98-3eca-445a-96c6-f782eab950d2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_aa760bfd-7421-40c8-802b-dec2d7b0ec32" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_032eec98-3eca-445a-96c6-f782eab950d2" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_aa760bfd-7421-40c8-802b-dec2d7b0ec32" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LandAndLandImprovementsMember_eafcea07-c908-40a3-b388-ff90b846cb5f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LandAndLandImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_aa760bfd-7421-40c8-802b-dec2d7b0ec32" xlink:to="loc_us-gaap_LandAndLandImprovementsMember_eafcea07-c908-40a3-b388-ff90b846cb5f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BuildingMember_8f82db75-ad36-4d3d-b20f-d5f327ecc3b3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BuildingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_aa760bfd-7421-40c8-802b-dec2d7b0ec32" xlink:to="loc_us-gaap_BuildingMember_8f82db75-ad36-4d3d-b20f-d5f327ecc3b3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseholdImprovementsMember_42832c86-7cc8-43d7-bd36-2dc53ebc117c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LeaseholdImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_aa760bfd-7421-40c8-802b-dec2d7b0ec32" xlink:to="loc_us-gaap_LeaseholdImprovementsMember_42832c86-7cc8-43d7-bd36-2dc53ebc117c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MachineryAndEquipmentMember_de132719-e224-4864-88f3-8f8e36fa4e24" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_MachineryAndEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_aa760bfd-7421-40c8-802b-dec2d7b0ec32" xlink:to="loc_us-gaap_MachineryAndEquipmentMember_de132719-e224-4864-88f3-8f8e36fa4e24" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FurnitureAndFixturesMember_08bc710e-a2fe-47a2-95c4-f3407de0bfb8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FurnitureAndFixturesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_aa760bfd-7421-40c8-802b-dec2d7b0ec32" xlink:to="loc_us-gaap_FurnitureAndFixturesMember_08bc710e-a2fe-47a2-95c4-f3407de0bfb8" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_ComputerHardwareAndSoftwareMember_f5fe0062-f20e-48b3-b69d-68bb431e4734" xlink:href="jbl-20210831.xsd#jbl_ComputerHardwareAndSoftwareMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_aa760bfd-7421-40c8-802b-dec2d7b0ec32" xlink:to="loc_jbl_ComputerHardwareAndSoftwareMember_f5fe0062-f20e-48b3-b69d-68bb431e4734" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransportationEquipmentMember_c9218751-e92c-48aa-bd51-2a8dac0bd7dd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TransportationEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_aa760bfd-7421-40c8-802b-dec2d7b0ec32" xlink:to="loc_us-gaap_TransportationEquipmentMember_c9218751-e92c-48aa-bd51-2a8dac0bd7dd" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConstructionInProgressMember_f3945721-41c1-4ecc-ba10-eb6d35c3ca1d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConstructionInProgressMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_aa760bfd-7421-40c8-802b-dec2d7b0ec32" xlink:to="loc_us-gaap_ConstructionInProgressMember_f3945721-41c1-4ecc-ba10-eb6d35c3ca1d" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jabil.com/role/GoodwillandOtherIntangibleAssetsChangesinGoodwillAllocatedtoSegmentsDetails" xlink:type="simple" xlink:href="jbl-20210831.xsd#GoodwillandOtherIntangibleAssetsChangesinGoodwillAllocatedtoSegmentsDetails"/>
  <link:definitionLink xlink:role="http://www.jabil.com/role/GoodwillandOtherIntangibleAssetsChangesinGoodwillAllocatedtoSegmentsDetails" xlink:type="extended" id="i3db38383e3f34d2a91f3236ab3fe637a_GoodwillandOtherIntangibleAssetsChangesinGoodwillAllocatedtoSegmentsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillLineItems_94493ed1-c5a3-4f26-9be2-043ec755f9f6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GoodwillLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillRollForward_9b755d3a-cf90-4115-99a7-94c7abe3acf0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GoodwillRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_94493ed1-c5a3-4f26-9be2-043ec755f9f6" xlink:to="loc_us-gaap_GoodwillRollForward_9b755d3a-cf90-4115-99a7-94c7abe3acf0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_dec6e8f1-9757-4118-a43a-7df97a3f67c4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_9b755d3a-cf90-4115-99a7-94c7abe3acf0" xlink:to="loc_us-gaap_Goodwill_dec6e8f1-9757-4118-a43a-7df97a3f67c4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillAcquiredDuringPeriod_80c6ed30-3536-44aa-8e32-f12b21586c8e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GoodwillAcquiredDuringPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_9b755d3a-cf90-4115-99a7-94c7abe3acf0" xlink:to="loc_us-gaap_GoodwillAcquiredDuringPeriod_80c6ed30-3536-44aa-8e32-f12b21586c8e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillForeignCurrencyTranslationGainLoss_6d79fcf0-86df-4994-a7df-cbf6ec87f52b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GoodwillForeignCurrencyTranslationGainLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_9b755d3a-cf90-4115-99a7-94c7abe3acf0" xlink:to="loc_us-gaap_GoodwillForeignCurrencyTranslationGainLoss_6d79fcf0-86df-4994-a7df-cbf6ec87f52b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_08298507-2db5-469e-a58e-f15029cf0549" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Goodwill"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfGoodwillTable_e0b7b6f7-96bc-4de7-afc9-6cd950cbc6e1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfGoodwillTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_GoodwillLineItems_94493ed1-c5a3-4f26-9be2-043ec755f9f6" xlink:to="loc_us-gaap_ScheduleOfGoodwillTable_e0b7b6f7-96bc-4de7-afc9-6cd950cbc6e1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_feb9435d-be18-4f9c-a14f-31dea0167ebb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_e0b7b6f7-96bc-4de7-afc9-6cd950cbc6e1" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_feb9435d-be18-4f9c-a14f-31dea0167ebb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_feb9435d-be18-4f9c-a14f-31dea0167ebb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_feb9435d-be18-4f9c-a14f-31dea0167ebb" xlink:to="loc_us-gaap_SegmentDomain_feb9435d-be18-4f9c-a14f-31dea0167ebb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_903bccf7-5aef-42ce-b17b-4521cd73a471" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_feb9435d-be18-4f9c-a14f-31dea0167ebb" xlink:to="loc_us-gaap_SegmentDomain_903bccf7-5aef-42ce-b17b-4521cd73a471" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_EmsMember_3a1f676a-a838-4339-b366-2e71167433d4" xlink:href="jbl-20210831.xsd#jbl_EmsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_903bccf7-5aef-42ce-b17b-4521cd73a471" xlink:to="loc_jbl_EmsMember_3a1f676a-a838-4339-b366-2e71167433d4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_DmsMember_74cbe99f-cd76-42d0-b142-c1d6d878ba73" xlink:href="jbl-20210831.xsd#jbl_DmsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_903bccf7-5aef-42ce-b17b-4521cd73a471" xlink:to="loc_jbl_DmsMember_74cbe99f-cd76-42d0-b142-c1d6d878ba73" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jabil.com/role/GoodwillandOtherIntangibleAssetsPurchasedIntangibleAssetsDetails" xlink:type="simple" xlink:href="jbl-20210831.xsd#GoodwillandOtherIntangibleAssetsPurchasedIntangibleAssetsDetails"/>
  <link:definitionLink xlink:role="http://www.jabil.com/role/GoodwillandOtherIntangibleAssetsPurchasedIntangibleAssetsDetails" xlink:type="extended" id="ic581527763404374970e78bf0bb2a149_GoodwillandOtherIntangibleAssetsPurchasedIntangibleAssetsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_jbl_AcquiredIntangibleAssetsByMajorClassLineItems_4d4b2418-ce2f-4906-957c-61aea9ed9626" xlink:href="jbl-20210831.xsd#jbl_AcquiredIntangibleAssetsByMajorClassLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_8ad0a614-60fc-4471-a28e-18716837fcd1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_AcquiredIntangibleAssetsByMajorClassLineItems_4d4b2418-ce2f-4906-957c-61aea9ed9626" xlink:to="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_8ad0a614-60fc-4471-a28e-18716837fcd1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_e32f3024-9654-4301-a3d6-0649e099e728" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IntangibleAssetsGrossExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_AcquiredIntangibleAssetsByMajorClassLineItems_4d4b2418-ce2f-4906-957c-61aea9ed9626" xlink:to="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_e32f3024-9654-4301-a3d6-0649e099e728" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_e89f460e-9223-49e1-b4fa-0e95dd5d6d07" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_AcquiredIntangibleAssetsByMajorClassLineItems_4d4b2418-ce2f-4906-957c-61aea9ed9626" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_e89f460e-9223-49e1-b4fa-0e95dd5d6d07" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_e78122e5-48e3-4d86-b0fe-28c2a5f1488b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_AcquiredIntangibleAssetsByMajorClassLineItems_4d4b2418-ce2f-4906-957c-61aea9ed9626" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_e78122e5-48e3-4d86-b0fe-28c2a5f1488b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_ScheduleOfAcquiredIntangibleAssetsByMajorClassTable_3e92b178-1f95-4824-bc7d-8ac63734ba9a" xlink:href="jbl-20210831.xsd#jbl_ScheduleOfAcquiredIntangibleAssetsByMajorClassTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_jbl_AcquiredIntangibleAssetsByMajorClassLineItems_4d4b2418-ce2f-4906-957c-61aea9ed9626" xlink:to="loc_jbl_ScheduleOfAcquiredIntangibleAssetsByMajorClassTable_3e92b178-1f95-4824-bc7d-8ac63734ba9a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_a151f792-14b7-43ce-b35a-9720ef530b4f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_jbl_ScheduleOfAcquiredIntangibleAssetsByMajorClassTable_3e92b178-1f95-4824-bc7d-8ac63734ba9a" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_a151f792-14b7-43ce-b35a-9720ef530b4f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_a151f792-14b7-43ce-b35a-9720ef530b4f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_a151f792-14b7-43ce-b35a-9720ef530b4f" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_a151f792-14b7-43ce-b35a-9720ef530b4f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_61c468a9-1613-468d-af60-f8b97ff96777" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_a151f792-14b7-43ce-b35a-9720ef530b4f" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_61c468a9-1613-468d-af60-f8b97ff96777" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_ContractualAgreementsAndCustomerRelationshipsMember_b7313221-0cfc-47d5-8fb3-ebd2996daa81" xlink:href="jbl-20210831.xsd#jbl_ContractualAgreementsAndCustomerRelationshipsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_61c468a9-1613-468d-af60-f8b97ff96777" xlink:to="loc_jbl_ContractualAgreementsAndCustomerRelationshipsMember_b7313221-0cfc-47d5-8fb3-ebd2996daa81" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntellectualPropertyMember_db0b96b3-422b-4199-9f87-973d0d727069" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IntellectualPropertyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_61c468a9-1613-468d-af60-f8b97ff96777" xlink:to="loc_us-gaap_IntellectualPropertyMember_db0b96b3-422b-4199-9f87-973d0d727069" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradeNamesMember_8823204e-7eb0-47d7-9f0e-5f89e902d608" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TradeNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_61c468a9-1613-468d-af60-f8b97ff96777" xlink:to="loc_us-gaap_TradeNamesMember_8823204e-7eb0-47d7-9f0e-5f89e902d608" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_6f9ab232-96d8-4a7e-8c60-0df4b989bf14" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_jbl_ScheduleOfAcquiredIntangibleAssetsByMajorClassTable_3e92b178-1f95-4824-bc7d-8ac63734ba9a" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_6f9ab232-96d8-4a7e-8c60-0df4b989bf14" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_6f9ab232-96d8-4a7e-8c60-0df4b989bf14_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_6f9ab232-96d8-4a7e-8c60-0df4b989bf14" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_6f9ab232-96d8-4a7e-8c60-0df4b989bf14_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_8cad10d0-28fc-45fc-b2f4-395f49086187" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_6f9ab232-96d8-4a7e-8c60-0df4b989bf14" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_8cad10d0-28fc-45fc-b2f4-395f49086187" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradeNamesMember_a67f8b8c-8e4d-4475-9d7f-4385f8e5b1e2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TradeNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_8cad10d0-28fc-45fc-b2f4-395f49086187" xlink:to="loc_us-gaap_TradeNamesMember_a67f8b8c-8e4d-4475-9d7f-4385f8e5b1e2" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jabil.com/role/NotesPayableandLongTermDebtScheduleofNotesPayableandLongTermDebtDetails" xlink:type="simple" xlink:href="jbl-20210831.xsd#NotesPayableandLongTermDebtScheduleofNotesPayableandLongTermDebtDetails"/>
  <link:definitionLink xlink:role="http://www.jabil.com/role/NotesPayableandLongTermDebtScheduleofNotesPayableandLongTermDebtDetails" xlink:type="extended" id="i1a75db13d214482ba18b02120cd83350_NotesPayableandLongTermDebtScheduleofNotesPayableandLongTermDebtDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_fbdb9bc6-1334-4fc5-853c-adc27d4c084d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_cf1bab38-c493-41a7-b44e-2ab1efdd6b49" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fbdb9bc6-1334-4fc5-853c-adc27d4c084d" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_cf1bab38-c493-41a7-b44e-2ab1efdd6b49" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_69c1009b-99f1-49bd-ad08-5135af222f92" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fbdb9bc6-1334-4fc5-853c-adc27d4c084d" xlink:to="loc_us-gaap_LongTermDebt_69c1009b-99f1-49bd-ad08-5135af222f92" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtCurrent_abf09015-33f6-4adf-97c9-7bb2ed23bae4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongTermDebtCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fbdb9bc6-1334-4fc5-853c-adc27d4c084d" xlink:to="loc_us-gaap_LongTermDebtCurrent_abf09015-33f6-4adf-97c9-7bb2ed23bae4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_457a402a-e86b-43e2-acb4-9f428955c45b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongTermDebtNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fbdb9bc6-1334-4fc5-853c-adc27d4c084d" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_457a402a-e86b-43e2-acb4-9f428955c45b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_a2c55deb-6a5d-496b-a782-68b44173018b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fbdb9bc6-1334-4fc5-853c-adc27d4c084d" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_a2c55deb-6a5d-496b-a782-68b44173018b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfDebt_1a72daa2-d9c1-4222-bba0-ab61f992072c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RepaymentsOfDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fbdb9bc6-1334-4fc5-853c-adc27d4c084d" xlink:to="loc_us-gaap_RepaymentsOfDebt_1a72daa2-d9c1-4222-bba0-ab61f992072c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTerm_0fd5d6de-d11b-43af-9021-cf8733a515a7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fbdb9bc6-1334-4fc5-853c-adc27d4c084d" xlink:to="loc_us-gaap_DebtInstrumentTerm_0fd5d6de-d11b-43af-9021-cf8733a515a7" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_9846861b-1ae8-41a9-bb40-c426ab23e398" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fbdb9bc6-1334-4fc5-853c-adc27d4c084d" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_9846861b-1ae8-41a9-bb40-c426ab23e398" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_3e12f658-03ed-461f-8036-2e62466a04b2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fbdb9bc6-1334-4fc5-853c-adc27d4c084d" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_3e12f658-03ed-461f-8036-2e62466a04b2" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_16b51a01-bb41-40c4-94ab-5cc4163a474b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fbdb9bc6-1334-4fc5-853c-adc27d4c084d" xlink:to="loc_us-gaap_DebtInstrumentTable_16b51a01-bb41-40c4-94ab-5cc4163a474b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_07d1a58d-0651-44fe-babe-af2a192efa20" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_16b51a01-bb41-40c4-94ab-5cc4163a474b" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_07d1a58d-0651-44fe-babe-af2a192efa20" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_07d1a58d-0651-44fe-babe-af2a192efa20_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_07d1a58d-0651-44fe-babe-af2a192efa20" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_07d1a58d-0651-44fe-babe-af2a192efa20_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_f276a32b-5c65-40ec-8da1-8625c504e0eb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_07d1a58d-0651-44fe-babe-af2a192efa20" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_f276a32b-5c65-40ec-8da1-8625c504e0eb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_d491349a-58dc-49fc-a34e-ca7952d60a60" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_f276a32b-5c65-40ec-8da1-8625c504e0eb" xlink:to="loc_us-gaap_SeniorNotesMember_d491349a-58dc-49fc-a34e-ca7952d60a60" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_7607f7ab-b1d8-4903-a3d6-5ac9404b61d2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_f276a32b-5c65-40ec-8da1-8625c504e0eb" xlink:to="loc_us-gaap_LineOfCreditMember_7607f7ab-b1d8-4903-a3d6-5ac9404b61d2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_73128408-66c1-4fe5-bc66-994f7eb36c61" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_16b51a01-bb41-40c4-94ab-5cc4163a474b" xlink:to="loc_us-gaap_CreditFacilityAxis_73128408-66c1-4fe5-bc66-994f7eb36c61" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_73128408-66c1-4fe5-bc66-994f7eb36c61_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_73128408-66c1-4fe5-bc66-994f7eb36c61" xlink:to="loc_us-gaap_CreditFacilityDomain_73128408-66c1-4fe5-bc66-994f7eb36c61_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_a1616d30-5686-4b0e-b3f8-3b1ea59badef" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_73128408-66c1-4fe5-bc66-994f7eb36c61" xlink:to="loc_us-gaap_CreditFacilityDomain_a1616d30-5686-4b0e-b3f8-3b1ea59badef" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_3e26ddf6-0816-4990-a29e-5d96aedf9218" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_a1616d30-5686-4b0e-b3f8-3b1ea59badef" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_3e26ddf6-0816-4990-a29e-5d96aedf9218" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_TermLoanFacilityMember_a080b22e-9112-4e83-8bc9-20519bced6d4" xlink:href="jbl-20210831.xsd#jbl_TermLoanFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_a1616d30-5686-4b0e-b3f8-3b1ea59badef" xlink:to="loc_jbl_TermLoanFacilityMember_a080b22e-9112-4e83-8bc9-20519bced6d4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaperMember_2fb83754-1667-4959-9623-650be9db5a9e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommercialPaperMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_a1616d30-5686-4b0e-b3f8-3b1ea59badef" xlink:to="loc_us-gaap_CommercialPaperMember_2fb83754-1667-4959-9623-650be9db5a9e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_0674d4a0-c43b-43da-85e8-c71689207b34" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_16b51a01-bb41-40c4-94ab-5cc4163a474b" xlink:to="loc_us-gaap_DebtInstrumentAxis_0674d4a0-c43b-43da-85e8-c71689207b34" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_0674d4a0-c43b-43da-85e8-c71689207b34_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_0674d4a0-c43b-43da-85e8-c71689207b34" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_0674d4a0-c43b-43da-85e8-c71689207b34_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_a3a6cfed-02f1-4f74-af7e-e0fc194f6288" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_0674d4a0-c43b-43da-85e8-c71689207b34" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_a3a6cfed-02f1-4f74-af7e-e0fc194f6288" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_SeniorNotesDueSeptember2022Member_1e326d33-6923-446a-9c11-188c1a194ece" xlink:href="jbl-20210831.xsd#jbl_SeniorNotesDueSeptember2022Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_a3a6cfed-02f1-4f74-af7e-e0fc194f6288" xlink:to="loc_jbl_SeniorNotesDueSeptember2022Member_1e326d33-6923-446a-9c11-188c1a194ece" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_SeniorNotesDueJuly2023Member_1f87d1df-b57b-4af2-a693-dcaa8c03a50b" xlink:href="jbl-20210831.xsd#jbl_SeniorNotesDueJuly2023Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_a3a6cfed-02f1-4f74-af7e-e0fc194f6288" xlink:to="loc_jbl_SeniorNotesDueJuly2023Member_1f87d1df-b57b-4af2-a693-dcaa8c03a50b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_SeniorNotesDueJanuary2028Member_417ee184-8afa-4fc1-9cca-ca9b62c5b985" xlink:href="jbl-20210831.xsd#jbl_SeniorNotesDueJanuary2028Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_a3a6cfed-02f1-4f74-af7e-e0fc194f6288" xlink:to="loc_jbl_SeniorNotesDueJanuary2028Member_417ee184-8afa-4fc1-9cca-ca9b62c5b985" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_SeniorNotesDueJanuary2030Member_62f7e38d-d247-42a9-96a3-499a45ace01e" xlink:href="jbl-20210831.xsd#jbl_SeniorNotesDueJanuary2030Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_a3a6cfed-02f1-4f74-af7e-e0fc194f6288" xlink:to="loc_jbl_SeniorNotesDueJanuary2030Member_62f7e38d-d247-42a9-96a3-499a45ace01e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_SeniorNotesDueJanuary2031Member_3099550e-4b1a-49aa-a4b0-b4f528261d45" xlink:href="jbl-20210831.xsd#jbl_SeniorNotesDueJanuary2031Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_a3a6cfed-02f1-4f74-af7e-e0fc194f6288" xlink:to="loc_jbl_SeniorNotesDueJanuary2031Member_3099550e-4b1a-49aa-a4b0-b4f528261d45" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_SeniorNotesDueApril2026Member_fa2cc846-9751-4fed-aeda-413324c15644" xlink:href="jbl-20210831.xsd#jbl_SeniorNotesDueApril2026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_a3a6cfed-02f1-4f74-af7e-e0fc194f6288" xlink:to="loc_jbl_SeniorNotesDueApril2026Member_fa2cc846-9751-4fed-aeda-413324c15644" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_PriorTermLoanFacilityMember_2c025181-96e3-42ea-ab5b-9910aab66b64" xlink:href="jbl-20210831.xsd#jbl_PriorTermLoanFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_a3a6cfed-02f1-4f74-af7e-e0fc194f6288" xlink:to="loc_jbl_PriorTermLoanFacilityMember_2c025181-96e3-42ea-ab5b-9910aab66b64" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_CreditFacilityDueJanuary2024Member_3750e9a1-5066-420b-af2b-bc57d9051e3c" xlink:href="jbl-20210831.xsd#jbl_CreditFacilityDueJanuary2024Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_a3a6cfed-02f1-4f74-af7e-e0fc194f6288" xlink:to="loc_jbl_CreditFacilityDueJanuary2024Member_3750e9a1-5066-420b-af2b-bc57d9051e3c" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_CreditFacilityDueJanuary2026Member_0479ed0c-ba2a-4447-b992-93d220144242" xlink:href="jbl-20210831.xsd#jbl_CreditFacilityDueJanuary2026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_a3a6cfed-02f1-4f74-af7e-e0fc194f6288" xlink:to="loc_jbl_CreditFacilityDueJanuary2026Member_0479ed0c-ba2a-4447-b992-93d220144242" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jabil.com/role/NotesPayableandLongTermDebtAdditionalInformationDetails" xlink:type="simple" xlink:href="jbl-20210831.xsd#NotesPayableandLongTermDebtAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.jabil.com/role/NotesPayableandLongTermDebtAdditionalInformationDetails" xlink:type="extended" id="i2725327e6e0d42bd9f566692b5a2d378_NotesPayableandLongTermDebtAdditionalInformationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_cd836793-da18-43d2-8802-73a8eb496f05" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_LettersOfCreditAndSuretyBondsOutstanding_f1ddca8f-caeb-4fbd-8f9a-a6e045137de6" xlink:href="jbl-20210831.xsd#jbl_LettersOfCreditAndSuretyBondsOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_cd836793-da18-43d2-8802-73a8eb496f05" xlink:to="loc_jbl_LettersOfCreditAndSuretyBondsOutstanding_f1ddca8f-caeb-4fbd-8f9a-a6e045137de6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_LettersOfCreditAndSuretyBondsAvailable_f645e253-b8bb-4978-aaea-1d2566976700" xlink:href="jbl-20210831.xsd#jbl_LettersOfCreditAndSuretyBondsAvailable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_cd836793-da18-43d2-8802-73a8eb496f05" xlink:to="loc_jbl_LettersOfCreditAndSuretyBondsAvailable_f645e253-b8bb-4978-aaea-1d2566976700" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_57b2c188-d867-49dd-a2c8-9ecf51d99d03" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_cd836793-da18-43d2-8802-73a8eb496f05" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_57b2c188-d867-49dd-a2c8-9ecf51d99d03" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_0e62cfc0-1f0a-4148-81ca-13904ef9484e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_cd836793-da18-43d2-8802-73a8eb496f05" xlink:to="loc_us-gaap_DebtInstrumentTable_0e62cfc0-1f0a-4148-81ca-13904ef9484e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_05b361bf-b55c-4803-9f1c-2074f03dac5e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_0e62cfc0-1f0a-4148-81ca-13904ef9484e" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_05b361bf-b55c-4803-9f1c-2074f03dac5e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_05b361bf-b55c-4803-9f1c-2074f03dac5e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_05b361bf-b55c-4803-9f1c-2074f03dac5e" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_05b361bf-b55c-4803-9f1c-2074f03dac5e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_5cab1a27-fe0d-4652-bac7-c367d771d029" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_05b361bf-b55c-4803-9f1c-2074f03dac5e" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_5cab1a27-fe0d-4652-bac7-c367d771d029" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_21bf0ee2-6235-491f-9e19-9865f12e7c0f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_5cab1a27-fe0d-4652-bac7-c367d771d029" xlink:to="loc_us-gaap_SeniorNotesMember_21bf0ee2-6235-491f-9e19-9865f12e7c0f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_a2b1aad0-2921-47d4-a49d-fd387da74bfa" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_0e62cfc0-1f0a-4148-81ca-13904ef9484e" xlink:to="loc_us-gaap_DebtInstrumentAxis_a2b1aad0-2921-47d4-a49d-fd387da74bfa" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_a2b1aad0-2921-47d4-a49d-fd387da74bfa_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_a2b1aad0-2921-47d4-a49d-fd387da74bfa" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_a2b1aad0-2921-47d4-a49d-fd387da74bfa_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_840bb81d-27ff-46ef-bcc0-ee857dd775d1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_a2b1aad0-2921-47d4-a49d-fd387da74bfa" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_840bb81d-27ff-46ef-bcc0-ee857dd775d1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_SeniorNotesDueJuly2023Member_561749ec-532f-438b-9fcb-630c1d94e915" xlink:href="jbl-20210831.xsd#jbl_SeniorNotesDueJuly2023Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_840bb81d-27ff-46ef-bcc0-ee857dd775d1" xlink:to="loc_jbl_SeniorNotesDueJuly2023Member_561749ec-532f-438b-9fcb-630c1d94e915" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_SeniorNotesDueSeptember2022Member_3d945706-8c37-46f7-ba7e-0117371346fe" xlink:href="jbl-20210831.xsd#jbl_SeniorNotesDueSeptember2022Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_840bb81d-27ff-46ef-bcc0-ee857dd775d1" xlink:to="loc_jbl_SeniorNotesDueSeptember2022Member_3d945706-8c37-46f7-ba7e-0117371346fe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_SeniorNotesDueJanuary2028Member_a11946a1-44d0-4bd2-82b6-7611a69a8b65" xlink:href="jbl-20210831.xsd#jbl_SeniorNotesDueJanuary2028Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_840bb81d-27ff-46ef-bcc0-ee857dd775d1" xlink:to="loc_jbl_SeniorNotesDueJanuary2028Member_a11946a1-44d0-4bd2-82b6-7611a69a8b65" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_SeniorNotesDueJanuary2030Member_1af2bfbd-0137-44da-a364-ca508660621f" xlink:href="jbl-20210831.xsd#jbl_SeniorNotesDueJanuary2030Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_840bb81d-27ff-46ef-bcc0-ee857dd775d1" xlink:to="loc_jbl_SeniorNotesDueJanuary2030Member_1af2bfbd-0137-44da-a364-ca508660621f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_SeniorNotesDueJanuary2031Member_f3f899b7-f88a-4767-8b2c-3f1d540843c8" xlink:href="jbl-20210831.xsd#jbl_SeniorNotesDueJanuary2031Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_840bb81d-27ff-46ef-bcc0-ee857dd775d1" xlink:to="loc_jbl_SeniorNotesDueJanuary2031Member_f3f899b7-f88a-4767-8b2c-3f1d540843c8" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_SeniorNotesDueApril2026Member_a17bd8cb-1109-4eb4-9812-cf43b109f27c" xlink:href="jbl-20210831.xsd#jbl_SeniorNotesDueApril2026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_840bb81d-27ff-46ef-bcc0-ee857dd775d1" xlink:to="loc_jbl_SeniorNotesDueApril2026Member_a17bd8cb-1109-4eb4-9812-cf43b109f27c" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jabil.com/role/AssetBackedSecuritizationProgramsAdditionalInformationDetails" xlink:type="simple" xlink:href="jbl-20210831.xsd#AssetBackedSecuritizationProgramsAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.jabil.com/role/AssetBackedSecuritizationProgramsAdditionalInformationDetails" xlink:type="extended" id="ib6139ad01ab245189ffff61294408072_AssetBackedSecuritizationProgramsAdditionalInformationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_jbl_TradeAccountsReceivableSecuritizationAndSaleProgramLineItems_efd71793-7333-4597-a506-2a2d47af4d4c" xlink:href="jbl-20210831.xsd#jbl_TradeAccountsReceivableSecuritizationAndSaleProgramLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_NetCashProceedsAvailableAtAnyOneTimeUnderAssetBackedSecuritizationProgram_6b6c1ce2-af65-4951-a822-3fc44ed1f064" xlink:href="jbl-20210831.xsd#jbl_NetCashProceedsAvailableAtAnyOneTimeUnderAssetBackedSecuritizationProgram"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_TradeAccountsReceivableSecuritizationAndSaleProgramLineItems_efd71793-7333-4597-a506-2a2d47af4d4c" xlink:to="loc_jbl_NetCashProceedsAvailableAtAnyOneTimeUnderAssetBackedSecuritizationProgram_6b6c1ce2-af65-4951-a822-3fc44ed1f064" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_AvailableLiquidityUnderAssetBackedSecuritizationProgram_24517c81-7dd3-4e3b-90f8-4fd03492052d" xlink:href="jbl-20210831.xsd#jbl_AvailableLiquidityUnderAssetBackedSecuritizationProgram"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_TradeAccountsReceivableSecuritizationAndSaleProgramLineItems_efd71793-7333-4597-a506-2a2d47af4d4c" xlink:to="loc_jbl_AvailableLiquidityUnderAssetBackedSecuritizationProgram_24517c81-7dd3-4e3b-90f8-4fd03492052d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_CashFlowsBetweenTransferorAndTransfereeSettlementOfOutstandingAmounts_d5eb64db-895d-4e29-880e-6ea62b56d3f2" xlink:href="jbl-20210831.xsd#jbl_CashFlowsBetweenTransferorAndTransfereeSettlementOfOutstandingAmounts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_TradeAccountsReceivableSecuritizationAndSaleProgramLineItems_efd71793-7333-4597-a506-2a2d47af4d4c" xlink:to="loc_jbl_CashFlowsBetweenTransferorAndTransfereeSettlementOfOutstandingAmounts_d5eb64db-895d-4e29-880e-6ea62b56d3f2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_CashFlowsBetweenTransferorAndTransfereeRemittanceOfCashCollectedOnPreviouslyTransferredFinancialAssets_08efb1ec-9912-4938-afe3-5d8393312a9f" xlink:href="jbl-20210831.xsd#jbl_CashFlowsBetweenTransferorAndTransfereeRemittanceOfCashCollectedOnPreviouslyTransferredFinancialAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_TradeAccountsReceivableSecuritizationAndSaleProgramLineItems_efd71793-7333-4597-a506-2a2d47af4d4c" xlink:to="loc_jbl_CashFlowsBetweenTransferorAndTransfereeRemittanceOfCashCollectedOnPreviouslyTransferredFinancialAssets_08efb1ec-9912-4938-afe3-5d8393312a9f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashFlowsBetweenTransfereeAndTransferorPurchasesOfPreviouslyTransferredFinancialAssets_b8b5005a-8d44-4bad-a63d-a1c950a08203" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CashFlowsBetweenTransfereeAndTransferorPurchasesOfPreviouslyTransferredFinancialAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_TradeAccountsReceivableSecuritizationAndSaleProgramLineItems_efd71793-7333-4597-a506-2a2d47af4d4c" xlink:to="loc_us-gaap_CashFlowsBetweenTransfereeAndTransferorPurchasesOfPreviouslyTransferredFinancialAssets_b8b5005a-8d44-4bad-a63d-a1c950a08203" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GuaranteeObligationsCurrentCarryingValue_ac7c7514-e4be-4369-b34b-07d7bdba97b3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GuaranteeObligationsCurrentCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_TradeAccountsReceivableSecuritizationAndSaleProgramLineItems_efd71793-7333-4597-a506-2a2d47af4d4c" xlink:to="loc_us-gaap_GuaranteeObligationsCurrentCarryingValue_ac7c7514-e4be-4369-b34b-07d7bdba97b3" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_TradeAccountsReceivableSecuritizationAndSaleProgramTable_a0bf41d3-a686-4346-a494-604c7a8a3d64" xlink:href="jbl-20210831.xsd#jbl_TradeAccountsReceivableSecuritizationAndSaleProgramTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_jbl_TradeAccountsReceivableSecuritizationAndSaleProgramLineItems_efd71793-7333-4597-a506-2a2d47af4d4c" xlink:to="loc_jbl_TradeAccountsReceivableSecuritizationAndSaleProgramTable_a0bf41d3-a686-4346-a494-604c7a8a3d64" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_AssetBackedSecuritizationProgramsAxis_608f63b7-c2ce-4f1c-876d-e0d0621b9741" xlink:href="jbl-20210831.xsd#jbl_AssetBackedSecuritizationProgramsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_jbl_TradeAccountsReceivableSecuritizationAndSaleProgramTable_a0bf41d3-a686-4346-a494-604c7a8a3d64" xlink:to="loc_jbl_AssetBackedSecuritizationProgramsAxis_608f63b7-c2ce-4f1c-876d-e0d0621b9741" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_AssetBackedSecuritizationProgramsDomain_608f63b7-c2ce-4f1c-876d-e0d0621b9741_default" xlink:href="jbl-20210831.xsd#jbl_AssetBackedSecuritizationProgramsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_jbl_AssetBackedSecuritizationProgramsAxis_608f63b7-c2ce-4f1c-876d-e0d0621b9741" xlink:to="loc_jbl_AssetBackedSecuritizationProgramsDomain_608f63b7-c2ce-4f1c-876d-e0d0621b9741_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_AssetBackedSecuritizationProgramsDomain_5499c908-f522-4b33-be4e-8371a97ec202" xlink:href="jbl-20210831.xsd#jbl_AssetBackedSecuritizationProgramsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_jbl_AssetBackedSecuritizationProgramsAxis_608f63b7-c2ce-4f1c-876d-e0d0621b9741" xlink:to="loc_jbl_AssetBackedSecuritizationProgramsDomain_5499c908-f522-4b33-be4e-8371a97ec202" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_GlobalAssetBackedSecuritizationProgramMember_1c7bfa39-25f7-4c7a-bd72-0eaf42bb7ec8" xlink:href="jbl-20210831.xsd#jbl_GlobalAssetBackedSecuritizationProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_AssetBackedSecuritizationProgramsDomain_5499c908-f522-4b33-be4e-8371a97ec202" xlink:to="loc_jbl_GlobalAssetBackedSecuritizationProgramMember_1c7bfa39-25f7-4c7a-bd72-0eaf42bb7ec8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_f8aa13d8-a8cd-4864-8a7d-e04d609f939e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_jbl_TradeAccountsReceivableSecuritizationAndSaleProgramTable_a0bf41d3-a686-4346-a494-604c7a8a3d64" xlink:to="loc_us-gaap_FinancialInstrumentAxis_f8aa13d8-a8cd-4864-8a7d-e04d609f939e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_f8aa13d8-a8cd-4864-8a7d-e04d609f939e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_f8aa13d8-a8cd-4864-8a7d-e04d609f939e" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_f8aa13d8-a8cd-4864-8a7d-e04d609f939e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_a3254906-b020-45a9-91a7-b89c57a26adb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_f8aa13d8-a8cd-4864-8a7d-e04d609f939e" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_a3254906-b020-45a9-91a7-b89c57a26adb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetBackedSecuritiesMember_8974359d-7f82-4598-b186-1905b973ed4d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_a3254906-b020-45a9-91a7-b89c57a26adb" xlink:to="loc_us-gaap_AssetBackedSecuritiesMember_8974359d-7f82-4598-b186-1905b973ed4d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_e1639df3-5cb5-409d-8944-f9f7ce41d1db" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_jbl_TradeAccountsReceivableSecuritizationAndSaleProgramTable_a0bf41d3-a686-4346-a494-604c7a8a3d64" xlink:to="loc_srt_StatementGeographicalAxis_e1639df3-5cb5-409d-8944-f9f7ce41d1db" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_e1639df3-5cb5-409d-8944-f9f7ce41d1db_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_e1639df3-5cb5-409d-8944-f9f7ce41d1db" xlink:to="loc_srt_SegmentGeographicalDomain_e1639df3-5cb5-409d-8944-f9f7ce41d1db_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_e94a88b6-b4bf-4d6b-919a-566b498a0341" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_e1639df3-5cb5-409d-8944-f9f7ce41d1db" xlink:to="loc_srt_SegmentGeographicalDomain_e94a88b6-b4bf-4d6b-919a-566b498a0341" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonUsMember_b7935170-9c27-4c7f-850f-2e8f75e2245c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NonUsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_e94a88b6-b4bf-4d6b-919a-566b498a0341" xlink:to="loc_us-gaap_NonUsMember_b7935170-9c27-4c7f-850f-2e8f75e2245c" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jabil.com/role/AssetBackedSecuritizationProgramsSecuritizationActivityDetails" xlink:type="simple" xlink:href="jbl-20210831.xsd#AssetBackedSecuritizationProgramsSecuritizationActivityDetails"/>
  <link:definitionLink xlink:role="http://www.jabil.com/role/AssetBackedSecuritizationProgramsSecuritizationActivityDetails" xlink:type="extended" id="i923763221ae84043a6c9ed570905d729_AssetBackedSecuritizationProgramsSecuritizationActivityDetails">
    <link:loc xlink:type="locator" xlink:label="loc_jbl_TradeAccountsReceivableSecuritizationAndSaleProgramLineItems_42e228b3-9a3b-40be-99ef-ea161a34c903" xlink:href="jbl-20210831.xsd#jbl_TradeAccountsReceivableSecuritizationAndSaleProgramLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_TradeAccountReceivableSold_3b79987f-d9f1-49f1-a926-b2715ec1e291" xlink:href="jbl-20210831.xsd#jbl_TradeAccountReceivableSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_TradeAccountsReceivableSecuritizationAndSaleProgramLineItems_42e228b3-9a3b-40be-99ef-ea161a34c903" xlink:to="loc_jbl_TradeAccountReceivableSold_3b79987f-d9f1-49f1-a926-b2715ec1e291" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashFlowsBetweenTransfereeAndTransferorProceedsFromCollectionsReinvestedInRevolvingPeriodTransfers_c2dc55cd-0fc7-40da-89b7-32dbbb1a14e0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CashFlowsBetweenTransfereeAndTransferorProceedsFromCollectionsReinvestedInRevolvingPeriodTransfers"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_TradeAccountsReceivableSecuritizationAndSaleProgramLineItems_42e228b3-9a3b-40be-99ef-ea161a34c903" xlink:to="loc_us-gaap_CashFlowsBetweenTransfereeAndTransferorProceedsFromCollectionsReinvestedInRevolvingPeriodTransfers_c2dc55cd-0fc7-40da-89b7-32dbbb1a14e0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_CashFlowsBetweenTransferorAndTransfereeProceedsDueFromTransfereeProceedsDueFromTransfereeForTransferredFinancialAssets_715126da-d620-40d3-9f1d-0bb87487065b" xlink:href="jbl-20210831.xsd#jbl_CashFlowsBetweenTransferorAndTransfereeProceedsDueFromTransfereeProceedsDueFromTransfereeForTransferredFinancialAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_TradeAccountsReceivableSecuritizationAndSaleProgramLineItems_42e228b3-9a3b-40be-99ef-ea161a34c903" xlink:to="loc_jbl_CashFlowsBetweenTransferorAndTransfereeProceedsDueFromTransfereeProceedsDueFromTransfereeForTransferredFinancialAssets_715126da-d620-40d3-9f1d-0bb87487065b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleGainLossOnSale_f21f3391-309d-4dc5-83ee-1c2d2ae11484" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleGainLossOnSale"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_TradeAccountsReceivableSecuritizationAndSaleProgramLineItems_42e228b3-9a3b-40be-99ef-ea161a34c903" xlink:to="loc_us-gaap_SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleGainLossOnSale_f21f3391-309d-4dc5-83ee-1c2d2ae11484" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashFlowsBetweenTransfereeAndTransferorPurchasesOfPreviouslyTransferredFinancialAssets_280d6504-64a1-4755-889e-f81a903927a3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CashFlowsBetweenTransfereeAndTransferorPurchasesOfPreviouslyTransferredFinancialAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_TradeAccountsReceivableSecuritizationAndSaleProgramLineItems_42e228b3-9a3b-40be-99ef-ea161a34c903" xlink:to="loc_us-gaap_CashFlowsBetweenTransfereeAndTransferorPurchasesOfPreviouslyTransferredFinancialAssets_280d6504-64a1-4755-889e-f81a903927a3" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_NetCashReceivedInSecuritizationTransactions_4ab31e18-6638-4b37-b48e-d5a96e6bc746" xlink:href="jbl-20210831.xsd#jbl_NetCashReceivedInSecuritizationTransactions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_TradeAccountsReceivableSecuritizationAndSaleProgramLineItems_42e228b3-9a3b-40be-99ef-ea161a34c903" xlink:to="loc_jbl_NetCashReceivedInSecuritizationTransactions_4ab31e18-6638-4b37-b48e-d5a96e6bc746" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_TradeAccountsReceivableSecuritizationAndSaleProgramTable_eadf54a8-629e-4da6-91f6-8c0ee6e6c160" xlink:href="jbl-20210831.xsd#jbl_TradeAccountsReceivableSecuritizationAndSaleProgramTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_jbl_TradeAccountsReceivableSecuritizationAndSaleProgramLineItems_42e228b3-9a3b-40be-99ef-ea161a34c903" xlink:to="loc_jbl_TradeAccountsReceivableSecuritizationAndSaleProgramTable_eadf54a8-629e-4da6-91f6-8c0ee6e6c160" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleProgramTypeAxis_a4447960-652c-4bb2-8596-17d97b029063" xlink:href="jbl-20210831.xsd#jbl_SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleProgramTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_jbl_TradeAccountsReceivableSecuritizationAndSaleProgramTable_eadf54a8-629e-4da6-91f6-8c0ee6e6c160" xlink:to="loc_jbl_SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleProgramTypeAxis_a4447960-652c-4bb2-8596-17d97b029063" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleProgramTypeDomain_a4447960-652c-4bb2-8596-17d97b029063_default" xlink:href="jbl-20210831.xsd#jbl_SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleProgramTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_jbl_SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleProgramTypeAxis_a4447960-652c-4bb2-8596-17d97b029063" xlink:to="loc_jbl_SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleProgramTypeDomain_a4447960-652c-4bb2-8596-17d97b029063_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleProgramTypeDomain_e9032c85-942b-4191-bba6-fcbfe425a940" xlink:href="jbl-20210831.xsd#jbl_SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleProgramTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_jbl_SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleProgramTypeAxis_a4447960-652c-4bb2-8596-17d97b029063" xlink:to="loc_jbl_SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleProgramTypeDomain_e9032c85-942b-4191-bba6-fcbfe425a940" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_AssetBackedSecuritizationsMember_b036f472-c9a3-43a1-93a2-2e740f5cff0c" xlink:href="jbl-20210831.xsd#jbl_AssetBackedSecuritizationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleProgramTypeDomain_e9032c85-942b-4191-bba6-fcbfe425a940" xlink:to="loc_jbl_AssetBackedSecuritizationsMember_b036f472-c9a3-43a1-93a2-2e740f5cff0c" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jabil.com/role/PostretirementandOtherEmployeeBenefitsAdditionalInformationDetails" xlink:type="simple" xlink:href="jbl-20210831.xsd#PostretirementandOtherEmployeeBenefitsAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.jabil.com/role/PostretirementandOtherEmployeeBenefitsAdditionalInformationDetails" xlink:type="extended" id="i27f3e4223e6c48378fae488e4bbce8a0_PostretirementandOtherEmployeeBenefitsAdditionalInformationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_jbl_PensionAndOtherPostretirementBenefitsDisclosureLineItems_a2cc8ce2-d3a0-4e94-9888-dc70ac57b9b9" xlink:href="jbl-20210831.xsd#jbl_PensionAndOtherPostretirementBenefitsDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanTypeExtensibleList_a35dec93-b76d-4c79-a6b7-c8d636f125fd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlanTypeExtensibleList"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_PensionAndOtherPostretirementBenefitsDisclosureLineItems_a2cc8ce2-d3a0-4e94-9888-dc70ac57b9b9" xlink:to="loc_us-gaap_DefinedBenefitPlanTypeExtensibleList_a35dec93-b76d-4c79-a6b7-c8d636f125fd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_DefinedBenefitPlanServicePeriod_3a40a736-e387-4d6a-9f52-38b007ae8889" xlink:href="jbl-20210831.xsd#jbl_DefinedBenefitPlanServicePeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_PensionAndOtherPostretirementBenefitsDisclosureLineItems_a2cc8ce2-d3a0-4e94-9888-dc70ac57b9b9" xlink:to="loc_jbl_DefinedBenefitPlanServicePeriod_3a40a736-e387-4d6a-9f52-38b007ae8889" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanPlanAssetsTargetAllocationPercentage_7f7db06e-2026-40f8-a40a-b8a1be123156" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlanPlanAssetsTargetAllocationPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_PensionAndOtherPostretirementBenefitsDisclosureLineItems_a2cc8ce2-d3a0-4e94-9888-dc70ac57b9b9" xlink:to="loc_us-gaap_DefinedBenefitPlanPlanAssetsTargetAllocationPercentage_7f7db06e-2026-40f8-a40a-b8a1be123156" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear_610b1603-2923-40ef-a670-cee4ad1db4c4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_PensionAndOtherPostretirementBenefitsDisclosureLineItems_a2cc8ce2-d3a0-4e94-9888-dc70ac57b9b9" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear_610b1603-2923-40ef-a670-cee4ad1db4c4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_DefinedContributionPlanRequisiteServicePeriod_8b1f6c72-6e8f-42e9-aa25-11cf1f8683af" xlink:href="jbl-20210831.xsd#jbl_DefinedContributionPlanRequisiteServicePeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_PensionAndOtherPostretirementBenefitsDisclosureLineItems_a2cc8ce2-d3a0-4e94-9888-dc70ac57b9b9" xlink:to="loc_jbl_DefinedContributionPlanRequisiteServicePeriod_8b1f6c72-6e8f-42e9-aa25-11cf1f8683af" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedContributionPlanCostRecognized_36524e21-fb18-4347-9d33-37d4acd9e844" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedContributionPlanCostRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_PensionAndOtherPostretirementBenefitsDisclosureLineItems_a2cc8ce2-d3a0-4e94-9888-dc70ac57b9b9" xlink:to="loc_us-gaap_DefinedContributionPlanCostRecognized_36524e21-fb18-4347-9d33-37d4acd9e844" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_PensionAndOtherPostretirementBenefitsDisclosureTable_504fbbef-f7e0-408b-ac91-4983079dbdd2" xlink:href="jbl-20210831.xsd#jbl_PensionAndOtherPostretirementBenefitsDisclosureTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_jbl_PensionAndOtherPostretirementBenefitsDisclosureLineItems_a2cc8ce2-d3a0-4e94-9888-dc70ac57b9b9" xlink:to="loc_jbl_PensionAndOtherPostretirementBenefitsDisclosureTable_504fbbef-f7e0-408b-ac91-4983079dbdd2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanSponsorLocationAxis_e167bb0a-9c61-49bb-831a-3a59139fc0f2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RetirementPlanSponsorLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_jbl_PensionAndOtherPostretirementBenefitsDisclosureTable_504fbbef-f7e0-408b-ac91-4983079dbdd2" xlink:to="loc_us-gaap_RetirementPlanSponsorLocationAxis_e167bb0a-9c61-49bb-831a-3a59139fc0f2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanSponsorLocationDomain_e167bb0a-9c61-49bb-831a-3a59139fc0f2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RetirementPlanSponsorLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanSponsorLocationAxis_e167bb0a-9c61-49bb-831a-3a59139fc0f2" xlink:to="loc_us-gaap_RetirementPlanSponsorLocationDomain_e167bb0a-9c61-49bb-831a-3a59139fc0f2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanSponsorLocationDomain_c144c4f5-7154-49f2-88b1-22ced6f0f0d8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RetirementPlanSponsorLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanSponsorLocationAxis_e167bb0a-9c61-49bb-831a-3a59139fc0f2" xlink:to="loc_us-gaap_RetirementPlanSponsorLocationDomain_c144c4f5-7154-49f2-88b1-22ced6f0f0d8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignPlanMember_3b579fb8-f3c1-4981-a3f1-01f8530e7528" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ForeignPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanSponsorLocationDomain_c144c4f5-7154-49f2-88b1-22ced6f0f0d8" xlink:to="loc_us-gaap_ForeignPlanMember_3b579fb8-f3c1-4981-a3f1-01f8530e7528" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_37b45add-8e3a-47b4-a63c-b70806ee0379" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_jbl_PensionAndOtherPostretirementBenefitsDisclosureTable_504fbbef-f7e0-408b-ac91-4983079dbdd2" xlink:to="loc_us-gaap_PlanNameAxis_37b45add-8e3a-47b4-a63c-b70806ee0379" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_37b45add-8e3a-47b4-a63c-b70806ee0379_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_37b45add-8e3a-47b4-a63c-b70806ee0379" xlink:to="loc_us-gaap_PlanNameDomain_37b45add-8e3a-47b4-a63c-b70806ee0379_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_5121b7c8-620a-419a-9823-3c19252e8e50" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_37b45add-8e3a-47b4-a63c-b70806ee0379" xlink:to="loc_us-gaap_PlanNameDomain_5121b7c8-620a-419a-9823-3c19252e8e50" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_SwitzerlandPlanMember_45985369-e829-4246-84e7-67d5e2469a3d" xlink:href="jbl-20210831.xsd#jbl_SwitzerlandPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_5121b7c8-620a-419a-9823-3c19252e8e50" xlink:to="loc_jbl_SwitzerlandPlanMember_45985369-e829-4246-84e7-67d5e2469a3d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_d8d1c670-88f0-4e95-887e-f3a8721e0223" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_jbl_PensionAndOtherPostretirementBenefitsDisclosureTable_504fbbef-f7e0-408b-ac91-4983079dbdd2" xlink:to="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_d8d1c670-88f0-4e95-887e-f3a8721e0223" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanAssetCategoriesDomain_d8d1c670-88f0-4e95-887e-f3a8721e0223_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PlanAssetCategoriesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_d8d1c670-88f0-4e95-887e-f3a8721e0223" xlink:to="loc_us-gaap_PlanAssetCategoriesDomain_d8d1c670-88f0-4e95-887e-f3a8721e0223_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanAssetCategoriesDomain_18fe01ca-b5c5-49ed-a683-a03abc923394" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PlanAssetCategoriesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_d8d1c670-88f0-4e95-887e-f3a8721e0223" xlink:to="loc_us-gaap_PlanAssetCategoriesDomain_18fe01ca-b5c5-49ed-a683-a03abc923394" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanEquitySecuritiesMember_2f49e343-8687-467e-820e-ea2f84a0b1e6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlanEquitySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_18fe01ca-b5c5-49ed-a683-a03abc923394" xlink:to="loc_us-gaap_DefinedBenefitPlanEquitySecuritiesMember_2f49e343-8687-467e-820e-ea2f84a0b1e6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanDebtSecurityMember_15698fb1-9cd4-4e06-8ddf-267ca89c5040" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlanDebtSecurityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_18fe01ca-b5c5-49ed-a683-a03abc923394" xlink:to="loc_us-gaap_DefinedBenefitPlanDebtSecurityMember_15698fb1-9cd4-4e06-8ddf-267ca89c5040" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_030decbe-52b5-40dd-be2c-37a234781de5" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_jbl_PensionAndOtherPostretirementBenefitsDisclosureTable_504fbbef-f7e0-408b-ac91-4983079dbdd2" xlink:to="loc_srt_RangeAxis_030decbe-52b5-40dd-be2c-37a234781de5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_030decbe-52b5-40dd-be2c-37a234781de5_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_030decbe-52b5-40dd-be2c-37a234781de5" xlink:to="loc_srt_RangeMember_030decbe-52b5-40dd-be2c-37a234781de5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_cacf1edc-f49a-4fe1-80bc-fd458c40266d" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_030decbe-52b5-40dd-be2c-37a234781de5" xlink:to="loc_srt_RangeMember_cacf1edc-f49a-4fe1-80bc-fd458c40266d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_a79a42b6-ff01-4b55-a1e5-bda738728b07" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_cacf1edc-f49a-4fe1-80bc-fd458c40266d" xlink:to="loc_srt_MinimumMember_a79a42b6-ff01-4b55-a1e5-bda738728b07" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_ad967c4e-4789-40e5-8e30-42e2308c1b24" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_cacf1edc-f49a-4fe1-80bc-fd458c40266d" xlink:to="loc_srt_MaximumMember_ad967c4e-4789-40e5-8e30-42e2308c1b24" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jabil.com/role/PostretirementandOtherEmployeeBenefitsFairValueofPlanAssetsDetails" xlink:type="simple" xlink:href="jbl-20210831.xsd#PostretirementandOtherEmployeeBenefitsFairValueofPlanAssetsDetails"/>
  <link:definitionLink xlink:role="http://www.jabil.com/role/PostretirementandOtherEmployeeBenefitsFairValueofPlanAssetsDetails" xlink:type="extended" id="i88cd39662d6b4cfbae12909b67c8bdb9_PostretirementandOtherEmployeeBenefitsFairValueofPlanAssetsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_461c6306-f46e-4d9c-bf5d-003229138501" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_efad17ac-a9b2-4e09-a137-4762d4d780de" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlanFairValueOfPlanAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_461c6306-f46e-4d9c-bf5d-003229138501" xlink:to="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_efad17ac-a9b2-4e09-a137-4762d4d780de" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations_6e388340-4488-4d75-96da-41adb6e19c8b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_461c6306-f46e-4d9c-bf5d-003229138501" xlink:to="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations_6e388340-4488-4d75-96da-41adb6e19c8b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_2803248e-ff26-4615-acea-bdc01e15df5f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_461c6306-f46e-4d9c-bf5d-003229138501" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_2803248e-ff26-4615-acea-bdc01e15df5f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_e2787002-0052-4d2a-9a56-281724c295fb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_2803248e-ff26-4615-acea-bdc01e15df5f" xlink:to="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_e2787002-0052-4d2a-9a56-281724c295fb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanAssetCategoriesDomain_e2787002-0052-4d2a-9a56-281724c295fb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PlanAssetCategoriesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_e2787002-0052-4d2a-9a56-281724c295fb" xlink:to="loc_us-gaap_PlanAssetCategoriesDomain_e2787002-0052-4d2a-9a56-281724c295fb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanAssetCategoriesDomain_60add24d-2287-4ed5-a3a2-d41f398043c3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PlanAssetCategoriesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_e2787002-0052-4d2a-9a56-281724c295fb" xlink:to="loc_us-gaap_PlanAssetCategoriesDomain_60add24d-2287-4ed5-a3a2-d41f398043c3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanCashAndCashEquivalentsMember_4124f6aa-417f-461e-aa22-e2f7585ba1d7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlanCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_60add24d-2287-4ed5-a3a2-d41f398043c3" xlink:to="loc_us-gaap_DefinedBenefitPlanCashAndCashEquivalentsMember_4124f6aa-417f-461e-aa22-e2f7585ba1d7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanEquitySecuritiesMember_94161e96-9a4d-4a7c-a425-557f9d50efbb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlanEquitySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_60add24d-2287-4ed5-a3a2-d41f398043c3" xlink:to="loc_us-gaap_DefinedBenefitPlanEquitySecuritiesMember_94161e96-9a4d-4a7c-a425-557f9d50efbb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_67827d39-3b70-44a7-9aa7-0508688f84e0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_60add24d-2287-4ed5-a3a2-d41f398043c3" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_67827d39-3b70-44a7-9aa7-0508688f84e0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USTreasuryAndGovernmentMember_8a5f2975-d5cc-44c1-b336-2721212ac6fa" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_USTreasuryAndGovernmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_60add24d-2287-4ed5-a3a2-d41f398043c3" xlink:to="loc_us-gaap_USTreasuryAndGovernmentMember_8a5f2975-d5cc-44c1-b336-2721212ac6fa" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_DefinedBenefitPlanInsuranceContractsMember_b47c04e2-60a4-4cdf-92cc-c5a7e20acb7f" xlink:href="jbl-20210831.xsd#jbl_DefinedBenefitPlanInsuranceContractsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_60add24d-2287-4ed5-a3a2-d41f398043c3" xlink:to="loc_jbl_DefinedBenefitPlanInsuranceContractsMember_b47c04e2-60a4-4cdf-92cc-c5a7e20acb7f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_7976d04f-2ae2-4eaa-9848-4137ee2b82f2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_2803248e-ff26-4615-acea-bdc01e15df5f" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_7976d04f-2ae2-4eaa-9848-4137ee2b82f2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_7976d04f-2ae2-4eaa-9848-4137ee2b82f2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_7976d04f-2ae2-4eaa-9848-4137ee2b82f2" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_7976d04f-2ae2-4eaa-9848-4137ee2b82f2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_217795aa-cebc-4c79-971a-0ed4f498bfba" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_7976d04f-2ae2-4eaa-9848-4137ee2b82f2" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_217795aa-cebc-4c79-971a-0ed4f498bfba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_24edfd69-6f7e-427d-aac6-c87b8d0241b5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_217795aa-cebc-4c79-971a-0ed4f498bfba" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_24edfd69-6f7e-427d-aac6-c87b8d0241b5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_67ac3dce-2b31-41a4-b884-ad1484aca80e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_217795aa-cebc-4c79-971a-0ed4f498bfba" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_67ac3dce-2b31-41a4-b884-ad1484aca80e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_8fb52148-eb6c-4877-812e-5e2905c80a54" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_217795aa-cebc-4c79-971a-0ed4f498bfba" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_8fb52148-eb6c-4877-812e-5e2905c80a54" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jabil.com/role/DerivativeFinancialInstrumentsandHedgingActivitiesForeignCurrencyRiskManagementDetails" xlink:type="simple" xlink:href="jbl-20210831.xsd#DerivativeFinancialInstrumentsandHedgingActivitiesForeignCurrencyRiskManagementDetails"/>
  <link:definitionLink xlink:role="http://www.jabil.com/role/DerivativeFinancialInstrumentsandHedgingActivitiesForeignCurrencyRiskManagementDetails" xlink:type="extended" id="i607a9270e9924fa58f54491ac940b68c_DerivativeFinancialInstrumentsandHedgingActivitiesForeignCurrencyRiskManagementDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLineItems_589c6d70-4b2b-4eb3-8c4a-ddb34c75d8a1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNotionalAmount_d8880186-d489-4876-b7f7-bd067a825a88" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeNotionalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_589c6d70-4b2b-4eb3-8c4a-ddb34c75d8a1" xlink:to="loc_us-gaap_DerivativeNotionalAmount_d8880186-d489-4876-b7f7-bd067a825a88" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeTable_d9577418-e389-4156-8b4a-6f347ad7e7ec" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeLineItems_589c6d70-4b2b-4eb3-8c4a-ddb34c75d8a1" xlink:to="loc_us-gaap_DerivativeTable_d9577418-e389-4156-8b4a-6f347ad7e7ec" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_76c02b2a-cf62-497b-ac44-15936c0d0fbd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_d9577418-e389-4156-8b4a-6f347ad7e7ec" xlink:to="loc_us-gaap_FinancialInstrumentAxis_76c02b2a-cf62-497b-ac44-15936c0d0fbd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_76c02b2a-cf62-497b-ac44-15936c0d0fbd_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_76c02b2a-cf62-497b-ac44-15936c0d0fbd" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_76c02b2a-cf62-497b-ac44-15936c0d0fbd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7a88cf07-9621-4a5e-bce9-1e13839982e5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_76c02b2a-cf62-497b-ac44-15936c0d0fbd" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7a88cf07-9621-4a5e-bce9-1e13839982e5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForwardContractsMember_b82808c0-75fb-4ee9-a49d-c2f4c3d26619" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ForwardContractsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7a88cf07-9621-4a5e-bce9-1e13839982e5" xlink:to="loc_us-gaap_ForwardContractsMember_b82808c0-75fb-4ee9-a49d-c2f4c3d26619" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_c8d96709-80e4-4415-9093-6e405b26eebf" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_d9577418-e389-4156-8b4a-6f347ad7e7ec" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_c8d96709-80e4-4415-9093-6e405b26eebf" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_c8d96709-80e4-4415-9093-6e405b26eebf_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_c8d96709-80e4-4415-9093-6e405b26eebf" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_c8d96709-80e4-4415-9093-6e405b26eebf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_dc7ee79d-0e7b-4a9b-896f-d18b91338577" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_c8d96709-80e4-4415-9093-6e405b26eebf" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_dc7ee79d-0e7b-4a9b-896f-d18b91338577" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeContractMember_d528359c-ebe7-45e4-8c6a-cc8464926ece" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ForeignExchangeContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_dc7ee79d-0e7b-4a9b-896f-d18b91338577" xlink:to="loc_us-gaap_ForeignExchangeContractMember_d528359c-ebe7-45e4-8c6a-cc8464926ece" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_15d11417-7153-4f00-8c3e-f4c9d5980010" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_d9577418-e389-4156-8b4a-6f347ad7e7ec" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_15d11417-7153-4f00-8c3e-f4c9d5980010" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingRelationshipDomain_15d11417-7153-4f00-8c3e-f4c9d5980010_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_HedgingRelationshipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_15d11417-7153-4f00-8c3e-f4c9d5980010" xlink:to="loc_us-gaap_HedgingRelationshipDomain_15d11417-7153-4f00-8c3e-f4c9d5980010_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingRelationshipDomain_572e43c7-e4af-43f4-b0e4-2d271cce964f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_HedgingRelationshipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_15d11417-7153-4f00-8c3e-f4c9d5980010" xlink:to="loc_us-gaap_HedgingRelationshipDomain_572e43c7-e4af-43f4-b0e4-2d271cce964f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashFlowHedgingMember_57962c24-c511-4139-88cd-40ed1e4c0eda" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CashFlowHedgingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingRelationshipDomain_572e43c7-e4af-43f4-b0e4-2d271cce964f" xlink:to="loc_us-gaap_CashFlowHedgingMember_57962c24-c511-4139-88cd-40ed1e4c0eda" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jabil.com/role/DerivativeFinancialInstrumentsandHedgingActivitiesDerivativesNotDesignatedAsHedgingInstrumentsDetails" xlink:type="simple" xlink:href="jbl-20210831.xsd#DerivativeFinancialInstrumentsandHedgingActivitiesDerivativesNotDesignatedAsHedgingInstrumentsDetails"/>
  <link:definitionLink xlink:role="http://www.jabil.com/role/DerivativeFinancialInstrumentsandHedgingActivitiesDerivativesNotDesignatedAsHedgingInstrumentsDetails" xlink:type="extended" id="i43aad73932e14797b63d264226836da5_DerivativeFinancialInstrumentsandHedgingActivitiesDerivativesNotDesignatedAsHedgingInstrumentsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLineItems_ed33d63d-c2b3-4c8c-9e97-f660cdfdd905" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet_115f3f63-a387-4060-8c49-831fd6755bd2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_ed33d63d-c2b3-4c8c-9e97-f660cdfdd905" xlink:to="loc_us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet_115f3f63-a387-4060-8c49-831fd6755bd2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_a1d1171f-4b86-4b92-ab49-d5b0376dda31" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ForeignCurrencyTransactionGainLossBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_ed33d63d-c2b3-4c8c-9e97-f660cdfdd905" xlink:to="loc_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_a1d1171f-4b86-4b92-ab49-d5b0376dda31" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeTable_4a594030-92b1-4741-9143-d5caa7ef7380" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeLineItems_ed33d63d-c2b3-4c8c-9e97-f660cdfdd905" xlink:to="loc_us-gaap_DerivativeTable_4a594030-92b1-4741-9143-d5caa7ef7380" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_62bb4522-e92f-461a-8eb2-08b7e1ff36b8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_4a594030-92b1-4741-9143-d5caa7ef7380" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_62bb4522-e92f-461a-8eb2-08b7e1ff36b8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_62bb4522-e92f-461a-8eb2-08b7e1ff36b8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_62bb4522-e92f-461a-8eb2-08b7e1ff36b8" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_62bb4522-e92f-461a-8eb2-08b7e1ff36b8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_8203404b-1fa1-4da2-8f1e-66394b54e5c4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_62bb4522-e92f-461a-8eb2-08b7e1ff36b8" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_8203404b-1fa1-4da2-8f1e-66394b54e5c4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfSalesMember_ecf4aeeb-bdd2-452b-bc67-940d0a25ec63" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CostOfSalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_8203404b-1fa1-4da2-8f1e-66394b54e5c4" xlink:to="loc_us-gaap_CostOfSalesMember_ecf4aeeb-bdd2-452b-bc67-940d0a25ec63" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_a99d589e-a2e1-4dfa-8af0-60712a042150" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_4a594030-92b1-4741-9143-d5caa7ef7380" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_a99d589e-a2e1-4dfa-8af0-60712a042150" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_a99d589e-a2e1-4dfa-8af0-60712a042150_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_a99d589e-a2e1-4dfa-8af0-60712a042150" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_a99d589e-a2e1-4dfa-8af0-60712a042150_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_4897bed4-784c-4596-ab28-e123943d47c3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_a99d589e-a2e1-4dfa-8af0-60712a042150" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_4897bed4-784c-4596-ab28-e123943d47c3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeContractMember_1717c34e-4117-430b-9cdd-d6b934200fb5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ForeignExchangeContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_4897bed4-784c-4596-ab28-e123943d47c3" xlink:to="loc_us-gaap_ForeignExchangeContractMember_1717c34e-4117-430b-9cdd-d6b934200fb5" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jabil.com/role/DerivativeFinancialInstrumentsandHedgingActivitiesCashFlowHedgesDetails" xlink:type="simple" xlink:href="jbl-20210831.xsd#DerivativeFinancialInstrumentsandHedgingActivitiesCashFlowHedgesDetails"/>
  <link:definitionLink xlink:role="http://www.jabil.com/role/DerivativeFinancialInstrumentsandHedgingActivitiesCashFlowHedgesDetails" xlink:type="extended" id="ib7ad3c59ff2148b68c2618c09eaf74a8_DerivativeFinancialInstrumentsandHedgingActivitiesCashFlowHedgesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLineItems_8a8b60ad-d34a-4ccb-ac63-ab24213467c9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNotionalAmount_cee14054-670b-4203-898d-4744f1a943ac" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeNotionalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_8a8b60ad-d34a-4ccb-ac63-ab24213467c9" xlink:to="loc_us-gaap_DerivativeNotionalAmount_cee14054-670b-4203-898d-4744f1a943ac" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_8f5c1816-2032-40a7-a300-106382a979e8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_8a8b60ad-d34a-4ccb-ac63-ab24213467c9" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_8f5c1816-2032-40a7-a300-106382a979e8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeTable_d6fcd1c6-ff87-4633-9c1c-18277ed95988" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeLineItems_8a8b60ad-d34a-4ccb-ac63-ab24213467c9" xlink:to="loc_us-gaap_DerivativeTable_d6fcd1c6-ff87-4633-9c1c-18277ed95988" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_4e4b22eb-59c9-4894-8445-3f0f7d9da3c1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_d6fcd1c6-ff87-4633-9c1c-18277ed95988" xlink:to="loc_us-gaap_DebtInstrumentAxis_4e4b22eb-59c9-4894-8445-3f0f7d9da3c1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_4e4b22eb-59c9-4894-8445-3f0f7d9da3c1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_4e4b22eb-59c9-4894-8445-3f0f7d9da3c1" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_4e4b22eb-59c9-4894-8445-3f0f7d9da3c1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_8171ab1d-a45e-4015-b98a-772545bd1c01" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_4e4b22eb-59c9-4894-8445-3f0f7d9da3c1" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_8171ab1d-a45e-4015-b98a-772545bd1c01" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_SeniorNotesDueJanuary2031Member_69659bc5-675b-4306-b7ac-6be9e8858ee0" xlink:href="jbl-20210831.xsd#jbl_SeniorNotesDueJanuary2031Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_8171ab1d-a45e-4015-b98a-772545bd1c01" xlink:to="loc_jbl_SeniorNotesDueJanuary2031Member_69659bc5-675b-4306-b7ac-6be9e8858ee0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_DebtObligationOneMember_fd79edf3-7217-4694-b5f7-f2c5c0021c28" xlink:href="jbl-20210831.xsd#jbl_DebtObligationOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_8171ab1d-a45e-4015-b98a-772545bd1c01" xlink:to="loc_jbl_DebtObligationOneMember_fd79edf3-7217-4694-b5f7-f2c5c0021c28" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_DebtObligationTwoMember_af392074-84de-49f0-be7a-f81905844a30" xlink:href="jbl-20210831.xsd#jbl_DebtObligationTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_8171ab1d-a45e-4015-b98a-772545bd1c01" xlink:to="loc_jbl_DebtObligationTwoMember_af392074-84de-49f0-be7a-f81905844a30" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_75729dd3-4536-4fd4-9510-eba5a32cf617" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_d6fcd1c6-ff87-4633-9c1c-18277ed95988" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_75729dd3-4536-4fd4-9510-eba5a32cf617" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingRelationshipDomain_75729dd3-4536-4fd4-9510-eba5a32cf617_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_HedgingRelationshipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_75729dd3-4536-4fd4-9510-eba5a32cf617" xlink:to="loc_us-gaap_HedgingRelationshipDomain_75729dd3-4536-4fd4-9510-eba5a32cf617_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingRelationshipDomain_51f22097-30be-43e0-9d90-e1f4214fe8fb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_HedgingRelationshipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_75729dd3-4536-4fd4-9510-eba5a32cf617" xlink:to="loc_us-gaap_HedgingRelationshipDomain_51f22097-30be-43e0-9d90-e1f4214fe8fb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashFlowHedgingMember_9f92bcb3-f1db-4e0b-b0c3-7b5e6f0772fc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CashFlowHedgingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingRelationshipDomain_51f22097-30be-43e0-9d90-e1f4214fe8fb" xlink:to="loc_us-gaap_CashFlowHedgingMember_9f92bcb3-f1db-4e0b-b0c3-7b5e6f0772fc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_fdbd7c5a-c0f4-4e91-ac03-5923989bb5ab" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_d6fcd1c6-ff87-4633-9c1c-18277ed95988" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_fdbd7c5a-c0f4-4e91-ac03-5923989bb5ab" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_fdbd7c5a-c0f4-4e91-ac03-5923989bb5ab_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_fdbd7c5a-c0f4-4e91-ac03-5923989bb5ab" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_fdbd7c5a-c0f4-4e91-ac03-5923989bb5ab_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_9e6e0c72-5161-493b-ada2-026bb5c2de97" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_fdbd7c5a-c0f4-4e91-ac03-5923989bb5ab" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_9e6e0c72-5161-493b-ada2-026bb5c2de97" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateSwapMember_797a3bce-abda-476c-a683-d6645669a75d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InterestRateSwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_9e6e0c72-5161-493b-ada2-026bb5c2de97" xlink:to="loc_us-gaap_InterestRateSwapMember_797a3bce-abda-476c-a683-d6645669a75d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_13424c58-f5bd-4cf8-ae0e-2723e2d9b5d2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_d6fcd1c6-ff87-4633-9c1c-18277ed95988" xlink:to="loc_us-gaap_FinancialInstrumentAxis_13424c58-f5bd-4cf8-ae0e-2723e2d9b5d2" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_13424c58-f5bd-4cf8-ae0e-2723e2d9b5d2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_13424c58-f5bd-4cf8-ae0e-2723e2d9b5d2" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_13424c58-f5bd-4cf8-ae0e-2723e2d9b5d2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_0c66bdd0-e327-4f87-ae43-8c40029e815e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_13424c58-f5bd-4cf8-ae0e-2723e2d9b5d2" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_0c66bdd0-e327-4f87-ae43-8c40029e815e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForwardContractsMember_16dc94b4-f762-4fbc-a06b-4ff3ec6ef822" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ForwardContractsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_0c66bdd0-e327-4f87-ae43-8c40029e815e" xlink:to="loc_us-gaap_ForwardContractsMember_16dc94b4-f762-4fbc-a06b-4ff3ec6ef822" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_2c739915-e2a4-4693-9001-a6a2bbbed654" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_d6fcd1c6-ff87-4633-9c1c-18277ed95988" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_2c739915-e2a4-4693-9001-a6a2bbbed654" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_2c739915-e2a4-4693-9001-a6a2bbbed654_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_2c739915-e2a4-4693-9001-a6a2bbbed654" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_2c739915-e2a4-4693-9001-a6a2bbbed654_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_0cb31469-b745-4785-86b4-0c10b8660cb7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_2c739915-e2a4-4693-9001-a6a2bbbed654" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_0cb31469-b745-4785-86b4-0c10b8660cb7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_287a8ca4-7b85-40a8-9a6f-2a3bd07c8550" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_0cb31469-b745-4785-86b4-0c10b8660cb7" xlink:to="loc_us-gaap_SeniorNotesMember_287a8ca4-7b85-40a8-9a6f-2a3bd07c8550" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jabil.com/role/StockholdersEquityRecognizedStockBasedCompensationDetails" xlink:type="simple" xlink:href="jbl-20210831.xsd#StockholdersEquityRecognizedStockBasedCompensationDetails"/>
  <link:definitionLink xlink:role="http://www.jabil.com/role/StockholdersEquityRecognizedStockBasedCompensationDetails" xlink:type="extended" id="i63ee2905461146ad8b3f5fa16762d771_StockholdersEquityRecognizedStockBasedCompensationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_91ef5022-f3c0-4632-ba06-b2a111b6b351" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_5a0b5f59-d2b6-4f68-8cf0-ad821b71fdcf" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_91ef5022-f3c0-4632-ba06-b2a111b6b351" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_5a0b5f59-d2b6-4f68-8cf0-ad821b71fdcf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_695aa66f-3557-41cd-98b8-8de5458fa84b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_91ef5022-f3c0-4632-ba06-b2a111b6b351" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_695aa66f-3557-41cd-98b8-8de5458fa84b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_22015669-6774-4b7c-b8a8-ff5e6fb39ccd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_695aa66f-3557-41cd-98b8-8de5458fa84b" xlink:to="loc_us-gaap_AwardTypeAxis_22015669-6774-4b7c-b8a8-ff5e6fb39ccd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_22015669-6774-4b7c-b8a8-ff5e6fb39ccd_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_22015669-6774-4b7c-b8a8-ff5e6fb39ccd" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_22015669-6774-4b7c-b8a8-ff5e6fb39ccd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_568e8f73-76ad-4a8e-96e8-9623cfba3e0b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_22015669-6774-4b7c-b8a8-ff5e6fb39ccd" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_568e8f73-76ad-4a8e-96e8-9623cfba3e0b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_14b9996e-769c-43e8-b85d-b92997add09a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_568e8f73-76ad-4a8e-96e8-9623cfba3e0b" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_14b9996e-769c-43e8-b85d-b92997add09a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockMember_f15d8399-48c9-4059-b3fd-d2fbdbe1b015" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EmployeeStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_568e8f73-76ad-4a8e-96e8-9623cfba3e0b" xlink:to="loc_us-gaap_EmployeeStockMember_f15d8399-48c9-4059-b3fd-d2fbdbe1b015" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jabil.com/role/StockholdersEquityEquityCompensationPlanAdditionalInformationDetails" xlink:type="simple" xlink:href="jbl-20210831.xsd#StockholdersEquityEquityCompensationPlanAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.jabil.com/role/StockholdersEquityEquityCompensationPlanAdditionalInformationDetails" xlink:type="extended" id="i7607d49da22045e58bcdc2bd75994312_StockholdersEquityEquityCompensationPlanAdditionalInformationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_635b2292-bbed-441b-8b3d-c64a3d60232e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_e2617d50-99bd-41de-8934-f3907caff898" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_635b2292-bbed-441b-8b3d-c64a3d60232e" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_e2617d50-99bd-41de-8934-f3907caff898" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_24c10263-06d7-4efb-9e8d-aaa6918e4bc6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_635b2292-bbed-441b-8b3d-c64a3d60232e" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_24c10263-06d7-4efb-9e8d-aaa6918e4bc6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_113cf93f-f1e1-4c5b-b5cd-78fdc2d9b07c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_635b2292-bbed-441b-8b3d-c64a3d60232e" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_113cf93f-f1e1-4c5b-b5cd-78fdc2d9b07c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_85268d17-a054-40d5-98ed-f865e0a3e971" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_113cf93f-f1e1-4c5b-b5cd-78fdc2d9b07c" xlink:to="loc_us-gaap_PlanNameAxis_85268d17-a054-40d5-98ed-f865e0a3e971" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_85268d17-a054-40d5-98ed-f865e0a3e971_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_85268d17-a054-40d5-98ed-f865e0a3e971" xlink:to="loc_us-gaap_PlanNameDomain_85268d17-a054-40d5-98ed-f865e0a3e971_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_41c77305-daa7-4532-a202-13194e1b4048" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_85268d17-a054-40d5-98ed-f865e0a3e971" xlink:to="loc_us-gaap_PlanNameDomain_41c77305-daa7-4532-a202-13194e1b4048" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_A2021EquityIncentivePlanMember_a87b84d3-9b7e-46b4-8d6c-ac074cf893af" xlink:href="jbl-20210831.xsd#jbl_A2021EquityIncentivePlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_41c77305-daa7-4532-a202-13194e1b4048" xlink:to="loc_jbl_A2021EquityIncentivePlanMember_a87b84d3-9b7e-46b4-8d6c-ac074cf893af" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jabil.com/role/StockholdersEquitySARSActivityDetails" xlink:type="simple" xlink:href="jbl-20210831.xsd#StockholdersEquitySARSActivityDetails"/>
  <link:definitionLink xlink:role="http://www.jabil.com/role/StockholdersEquitySARSActivityDetails" xlink:type="extended" id="iae02cd4c7c684845bdacebd89b560bbe_StockholdersEquitySARSActivityDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a1ce0dbe-eae5-4011-94f0-4086c2a576b8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_f1f8e9a8-bf73-4d5f-a65e-f1e3d6d07f8e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a1ce0dbe-eae5-4011-94f0-4086c2a576b8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_f1f8e9a8-bf73-4d5f-a65e-f1e3d6d07f8e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_eb947099-9057-49f5-a7ad-cfc51028e491" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_f1f8e9a8-bf73-4d5f-a65e-f1e3d6d07f8e" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_eb947099-9057-49f5-a7ad-cfc51028e491" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_69753b41-81d0-4550-aeee-e66a63436651" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_f1f8e9a8-bf73-4d5f-a65e-f1e3d6d07f8e" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_69753b41-81d0-4550-aeee-e66a63436651" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_9b5f4599-40c2-4ed8-8f77-524067031809" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_24868e78-b43c-4426-b348-17ec8286ac02" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a1ce0dbe-eae5-4011-94f0-4086c2a576b8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_24868e78-b43c-4426-b348-17ec8286ac02" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_d9772234-a3ff-4410-bde6-a40cd1e3b625" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a1ce0dbe-eae5-4011-94f0-4086c2a576b8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_d9772234-a3ff-4410-bde6-a40cd1e3b625" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1_1ae1ef7a-d600-4a6f-bc4a-3df16af9f596" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_d9772234-a3ff-4410-bde6-a40cd1e3b625" xlink:to="loc_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1_1ae1ef7a-d600-4a6f-bc4a-3df16af9f596" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_5375317d-456e-4c49-9211-d3245f9d82c3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_d9772234-a3ff-4410-bde6-a40cd1e3b625" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_5375317d-456e-4c49-9211-d3245f9d82c3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1_b70a2d0f-f9e6-403a-bb4b-05e836c917de" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_16ce772c-082d-450e-b04d-739487e465cb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a1ce0dbe-eae5-4011-94f0-4086c2a576b8" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_16ce772c-082d-450e-b04d-739487e465cb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_076dba3a-e3af-49e1-b404-a9430930b961" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a1ce0dbe-eae5-4011-94f0-4086c2a576b8" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_076dba3a-e3af-49e1-b404-a9430930b961" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_3dfdba9f-b292-4c97-b2f1-6bce28172ef7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_076dba3a-e3af-49e1-b404-a9430930b961" xlink:to="loc_us-gaap_AwardTypeAxis_3dfdba9f-b292-4c97-b2f1-6bce28172ef7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_3dfdba9f-b292-4c97-b2f1-6bce28172ef7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_3dfdba9f-b292-4c97-b2f1-6bce28172ef7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_3dfdba9f-b292-4c97-b2f1-6bce28172ef7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0f379b1c-8372-4876-aeef-cb1f0527e71e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_3dfdba9f-b292-4c97-b2f1-6bce28172ef7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0f379b1c-8372-4876-aeef-cb1f0527e71e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockAppreciationRightsSARSMember_7d9b9d80-c849-46fa-a204-8c0b157be19a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockAppreciationRightsSARSMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0f379b1c-8372-4876-aeef-cb1f0527e71e" xlink:to="loc_us-gaap_StockAppreciationRightsSARSMember_7d9b9d80-c849-46fa-a204-8c0b157be19a" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jabil.com/role/StockholdersEquityRestrictedStockUnitsAdditionalInformationDetails" xlink:type="simple" xlink:href="jbl-20210831.xsd#StockholdersEquityRestrictedStockUnitsAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.jabil.com/role/StockholdersEquityRestrictedStockUnitsAdditionalInformationDetails" xlink:type="extended" id="ide41c5ba8a33479fb259446bc955acdf_StockholdersEquityRestrictedStockUnitsAdditionalInformationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_96c2014f-c24f-47ec-8880-8ce119a32d93" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_3b9fd1f9-1e35-419e-a88f-6849101d81b6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_96c2014f-c24f-47ec-8880-8ce119a32d93" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_3b9fd1f9-1e35-419e-a88f-6849101d81b6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_b2e71886-25a1-47e5-bbef-9defadc0c075" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_96c2014f-c24f-47ec-8880-8ce119a32d93" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_b2e71886-25a1-47e5-bbef-9defadc0c075" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_e34d54ab-b5f9-466f-935d-2b96581731e7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_96c2014f-c24f-47ec-8880-8ce119a32d93" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_e34d54ab-b5f9-466f-935d-2b96581731e7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_6b69650a-9b11-474d-b558-da97790be466" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_e34d54ab-b5f9-466f-935d-2b96581731e7" xlink:to="loc_us-gaap_AwardTypeAxis_6b69650a-9b11-474d-b558-da97790be466" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_6b69650a-9b11-474d-b558-da97790be466_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_6b69650a-9b11-474d-b558-da97790be466" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_6b69650a-9b11-474d-b558-da97790be466_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_3fe8f3cc-195a-4d0a-860e-1d0df8b18671" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_6b69650a-9b11-474d-b558-da97790be466" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_3fe8f3cc-195a-4d0a-860e-1d0df8b18671" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_TimeBasedRestrictedStockUnitsMember_1cae85a0-5435-41ea-ac98-f9855059ca6e" xlink:href="jbl-20210831.xsd#jbl_TimeBasedRestrictedStockUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_3fe8f3cc-195a-4d0a-860e-1d0df8b18671" xlink:to="loc_jbl_TimeBasedRestrictedStockUnitsMember_1cae85a0-5435-41ea-ac98-f9855059ca6e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_86ee919e-aa83-471a-ae71-032fd84ab2b3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_3fe8f3cc-195a-4d0a-860e-1d0df8b18671" xlink:to="loc_us-gaap_PerformanceSharesMember_86ee919e-aa83-471a-ae71-032fd84ab2b3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_MarketBasedRestrictedStockUnitsMember_f8bf5625-a436-4d54-ab68-e55f1ce66cce" xlink:href="jbl-20210831.xsd#jbl_MarketBasedRestrictedStockUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_3fe8f3cc-195a-4d0a-860e-1d0df8b18671" xlink:to="loc_jbl_MarketBasedRestrictedStockUnitsMember_f8bf5625-a436-4d54-ab68-e55f1ce66cce" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jabil.com/role/StockholdersEquityRestrictedStockActivityDetails" xlink:type="simple" xlink:href="jbl-20210831.xsd#StockholdersEquityRestrictedStockActivityDetails"/>
  <link:definitionLink xlink:role="http://www.jabil.com/role/StockholdersEquityRestrictedStockActivityDetails" xlink:type="extended" id="i3ac41626e0754cce8f85d6385f2cf3ef_StockholdersEquityRestrictedStockActivityDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_429d313b-0096-468e-a7bd-e921fbc27926" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_3430b1aa-8e84-4415-930d-274c8859f651" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_429d313b-0096-468e-a7bd-e921fbc27926" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_3430b1aa-8e84-4415-930d-274c8859f651" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_81ed8879-0477-4a82-8c18-9d43b425a562" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_3430b1aa-8e84-4415-930d-274c8859f651" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_81ed8879-0477-4a82-8c18-9d43b425a562" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedChangeInNumberOfSharesAbstract_0d7da6fb-0ff4-4dda-9cb5-9b2260aed155" xlink:href="jbl-20210831.xsd#jbl_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedChangeInNumberOfSharesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_3430b1aa-8e84-4415-930d-274c8859f651" xlink:to="loc_jbl_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedChangeInNumberOfSharesAbstract_0d7da6fb-0ff4-4dda-9cb5-9b2260aed155" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_90db7968-9147-4160-9d2f-96a2da639159" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedChangeInNumberOfSharesAbstract_0d7da6fb-0ff4-4dda-9cb5-9b2260aed155" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_90db7968-9147-4160-9d2f-96a2da639159" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_295f6c87-08d6-4837-b67f-0e97512ef0d9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedChangeInNumberOfSharesAbstract_0d7da6fb-0ff4-4dda-9cb5-9b2260aed155" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_295f6c87-08d6-4837-b67f-0e97512ef0d9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_b662be11-fc4d-4eed-86a7-c57cb7d29b48" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedChangeInNumberOfSharesAbstract_0d7da6fb-0ff4-4dda-9cb5-9b2260aed155" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_b662be11-fc4d-4eed-86a7-c57cb7d29b48" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_f5c101a2-9fb5-47e5-8246-5b5c8e5e7e4c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_6a8bc38c-4070-49e2-8aae-747e5eb10e5e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_429d313b-0096-468e-a7bd-e921fbc27926" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_6a8bc38c-4070-49e2-8aae-747e5eb10e5e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_e8ffc154-244e-480f-9f77-2f4d95394e32" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_6a8bc38c-4070-49e2-8aae-747e5eb10e5e" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_e8ffc154-244e-480f-9f77-2f4d95394e32" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedChangeInWeightedAverageGrantDateFairValueAbstract_084f51d4-e36d-45d4-ad0e-89319d7cb407" xlink:href="jbl-20210831.xsd#jbl_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedChangeInWeightedAverageGrantDateFairValueAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_6a8bc38c-4070-49e2-8aae-747e5eb10e5e" xlink:to="loc_jbl_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedChangeInWeightedAverageGrantDateFairValueAbstract_084f51d4-e36d-45d4-ad0e-89319d7cb407" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_a6f40032-b25a-491a-971e-e2f0f9b88cf4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedChangeInWeightedAverageGrantDateFairValueAbstract_084f51d4-e36d-45d4-ad0e-89319d7cb407" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_a6f40032-b25a-491a-971e-e2f0f9b88cf4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_58e7455c-7434-4061-a01d-c665fba4d1f8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedChangeInWeightedAverageGrantDateFairValueAbstract_084f51d4-e36d-45d4-ad0e-89319d7cb407" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_58e7455c-7434-4061-a01d-c665fba4d1f8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_e2fea8ce-ddb5-4500-a0da-502db01211a3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedChangeInWeightedAverageGrantDateFairValueAbstract_084f51d4-e36d-45d4-ad0e-89319d7cb407" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_e2fea8ce-ddb5-4500-a0da-502db01211a3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_151a6acf-534c-4e90-ba82-4e6f9b97a086" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod_3f3ac5e5-7ada-4b68-a9f8-61c72a2dec3c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_429d313b-0096-468e-a7bd-e921fbc27926" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod_3f3ac5e5-7ada-4b68-a9f8-61c72a2dec3c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_43896d4d-e292-4c63-8aac-d0d8e8bfc59e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_429d313b-0096-468e-a7bd-e921fbc27926" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_43896d4d-e292-4c63-8aac-d0d8e8bfc59e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationArrangementWithIndividualShareBasedPaymentsByTypeOfDeferredCompensationAxis_08d100de-8475-44e8-97bb-824ae60cbe07" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredCompensationArrangementWithIndividualShareBasedPaymentsByTypeOfDeferredCompensationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_43896d4d-e292-4c63-8aac-d0d8e8bfc59e" xlink:to="loc_us-gaap_DeferredCompensationArrangementWithIndividualShareBasedPaymentsByTypeOfDeferredCompensationAxis_08d100de-8475-44e8-97bb-824ae60cbe07" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityBasedArrangementsIndividualContractsTypeOfDeferredCompensationDomain_08d100de-8475-44e8-97bb-824ae60cbe07_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquityBasedArrangementsIndividualContractsTypeOfDeferredCompensationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualShareBasedPaymentsByTypeOfDeferredCompensationAxis_08d100de-8475-44e8-97bb-824ae60cbe07" xlink:to="loc_us-gaap_EquityBasedArrangementsIndividualContractsTypeOfDeferredCompensationDomain_08d100de-8475-44e8-97bb-824ae60cbe07_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityBasedArrangementsIndividualContractsTypeOfDeferredCompensationDomain_db6850b2-f60d-4ef5-ae55-b202bfe44db1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquityBasedArrangementsIndividualContractsTypeOfDeferredCompensationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualShareBasedPaymentsByTypeOfDeferredCompensationAxis_08d100de-8475-44e8-97bb-824ae60cbe07" xlink:to="loc_us-gaap_EquityBasedArrangementsIndividualContractsTypeOfDeferredCompensationDomain_db6850b2-f60d-4ef5-ae55-b202bfe44db1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_TimeBasedRestrictedStockUnitsMember_1529d435-8c62-473b-a018-efa9c6eea0a1" xlink:href="jbl-20210831.xsd#jbl_TimeBasedRestrictedStockUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityBasedArrangementsIndividualContractsTypeOfDeferredCompensationDomain_db6850b2-f60d-4ef5-ae55-b202bfe44db1" xlink:to="loc_jbl_TimeBasedRestrictedStockUnitsMember_1529d435-8c62-473b-a018-efa9c6eea0a1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_77404d09-0543-489f-9a28-19417deaa79e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityBasedArrangementsIndividualContractsTypeOfDeferredCompensationDomain_db6850b2-f60d-4ef5-ae55-b202bfe44db1" xlink:to="loc_us-gaap_PerformanceSharesMember_77404d09-0543-489f-9a28-19417deaa79e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_MarketBasedRestrictedStockUnitsMember_1540a6d2-35da-406a-8b95-05f562e6075c" xlink:href="jbl-20210831.xsd#jbl_MarketBasedRestrictedStockUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityBasedArrangementsIndividualContractsTypeOfDeferredCompensationDomain_db6850b2-f60d-4ef5-ae55-b202bfe44db1" xlink:to="loc_jbl_MarketBasedRestrictedStockUnitsMember_1540a6d2-35da-406a-8b95-05f562e6075c" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jabil.com/role/StockholdersEquityEmployeeStockPurchasePlanAdditionalInformationDetails" xlink:type="simple" xlink:href="jbl-20210831.xsd#StockholdersEquityEmployeeStockPurchasePlanAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.jabil.com/role/StockholdersEquityEmployeeStockPurchasePlanAdditionalInformationDetails" xlink:type="extended" id="i1b0127c5718a4f308ca0ed19ff3a699b_StockholdersEquityEmployeeStockPurchasePlanAdditionalInformationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_df875ce8-2661-4f84-b29b-e055cf872c16" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_d6f649e0-b639-4f83-98ef-386db3124d85" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_df875ce8-2661-4f84-b29b-e055cf872c16" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_d6f649e0-b639-4f83-98ef-386db3124d85" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_EligibilityPeriodForEmployeesToParticipateInEmployeeStockPurchasePlan_07637d77-98f4-47de-8d9e-56d8733e1fb4" xlink:href="jbl-20210831.xsd#jbl_EligibilityPeriodForEmployeesToParticipateInEmployeeStockPurchasePlan"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_df875ce8-2661-4f84-b29b-e055cf872c16" xlink:to="loc_jbl_EligibilityPeriodForEmployeesToParticipateInEmployeeStockPurchasePlan_07637d77-98f4-47de-8d9e-56d8733e1fb4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate_a275344f-2bd0-4f34-b2be-2954bf465b6b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_df875ce8-2661-4f84-b29b-e055cf872c16" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate_a275344f-2bd0-4f34-b2be-2954bf465b6b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent_37790217-8450-456c-9952-2f49da0416cc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_df875ce8-2661-4f84-b29b-e055cf872c16" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent_37790217-8450-456c-9952-2f49da0416cc" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_5538f4a4-298c-4ebb-9728-73e1ebfa6176" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_df875ce8-2661-4f84-b29b-e055cf872c16" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_5538f4a4-298c-4ebb-9728-73e1ebfa6176" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_78baf046-bcb1-414d-9b2a-51d6d17f7f0f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_df875ce8-2661-4f84-b29b-e055cf872c16" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_78baf046-bcb1-414d-9b2a-51d6d17f7f0f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_26f759fe-bedd-48d9-97a5-e0c9d62832a0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_78baf046-bcb1-414d-9b2a-51d6d17f7f0f" xlink:to="loc_us-gaap_PlanNameAxis_26f759fe-bedd-48d9-97a5-e0c9d62832a0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_26f759fe-bedd-48d9-97a5-e0c9d62832a0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_26f759fe-bedd-48d9-97a5-e0c9d62832a0" xlink:to="loc_us-gaap_PlanNameDomain_26f759fe-bedd-48d9-97a5-e0c9d62832a0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_c53d5399-78b5-403b-a0ef-48549948f726" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_26f759fe-bedd-48d9-97a5-e0c9d62832a0" xlink:to="loc_us-gaap_PlanNameDomain_c53d5399-78b5-403b-a0ef-48549948f726" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_A2011EmployeeStockPurchasePlanMember_58bf07d2-590b-4dd3-916e-3b6f322b9838" xlink:href="jbl-20210831.xsd#jbl_A2011EmployeeStockPurchasePlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_c53d5399-78b5-403b-a0ef-48549948f726" xlink:to="loc_jbl_A2011EmployeeStockPurchasePlanMember_58bf07d2-590b-4dd3-916e-3b6f322b9838" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_d8cfe4ee-445c-4a53-b19a-53f1df8f6b5a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_78baf046-bcb1-414d-9b2a-51d6d17f7f0f" xlink:to="loc_us-gaap_AwardTypeAxis_d8cfe4ee-445c-4a53-b19a-53f1df8f6b5a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_d8cfe4ee-445c-4a53-b19a-53f1df8f6b5a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_d8cfe4ee-445c-4a53-b19a-53f1df8f6b5a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_d8cfe4ee-445c-4a53-b19a-53f1df8f6b5a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_42e3f772-a52d-4a42-a97c-8cfb86dbd22f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_d8cfe4ee-445c-4a53-b19a-53f1df8f6b5a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_42e3f772-a52d-4a42-a97c-8cfb86dbd22f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockMember_e86d566a-4040-44c8-b3ae-26c7d3038b92" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EmployeeStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_42e3f772-a52d-4a42-a97c-8cfb86dbd22f" xlink:to="loc_us-gaap_EmployeeStockMember_e86d566a-4040-44c8-b3ae-26c7d3038b92" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jabil.com/role/StockholdersEquityCommonStockOutstandingDetails" xlink:type="simple" xlink:href="jbl-20210831.xsd#StockholdersEquityCommonStockOutstandingDetails"/>
  <link:definitionLink xlink:role="http://www.jabil.com/role/StockholdersEquityCommonStockOutstandingDetails" xlink:type="extended" id="i761d6f3ee5ac4644b8b6f90e48398066_StockholdersEquityCommonStockOutstandingDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_2e5064ad-93ed-417f-9c7c-ab47ec066889" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_ef63e8c8-6e93-48b2-9a57-b84bf3e718c0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_2e5064ad-93ed-417f-9c7c-ab47ec066889" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_ef63e8c8-6e93-48b2-9a57-b84bf3e718c0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_9d097497-e752-4957-a07b-69124f4a894d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_ef63e8c8-6e93-48b2-9a57-b84bf3e718c0" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_9d097497-e752-4957-a07b-69124f4a894d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod_66eed8f0-ba54-42b4-9dbd-a32f1377af88" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_ef63e8c8-6e93-48b2-9a57-b84bf3e718c0" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod_66eed8f0-ba54-42b4-9dbd-a32f1377af88" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_ae8c767b-892d-4f57-8510-d22b620e97ca" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_ef63e8c8-6e93-48b2-9a57-b84bf3e718c0" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_ae8c767b-892d-4f57-8510-d22b620e97ca" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_44bf60d7-5a63-4bb0-a816-1247dcd3a778" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_ef63e8c8-6e93-48b2-9a57-b84bf3e718c0" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_44bf60d7-5a63-4bb0-a816-1247dcd3a778" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_a7f500aa-9cce-449e-b610-1a96da165f8c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_ef63e8c8-6e93-48b2-9a57-b84bf3e718c0" xlink:to="loc_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_a7f500aa-9cce-449e-b610-1a96da165f8c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockSharesAcquired_714a9cf9-51c4-4605-b060-582d3fa2c812" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TreasuryStockSharesAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_ef63e8c8-6e93-48b2-9a57-b84bf3e718c0" xlink:to="loc_us-gaap_TreasuryStockSharesAcquired_714a9cf9-51c4-4605-b060-582d3fa2c812" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_fa054c4e-3391-452f-998f-93a5d0d62ee2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchaseProgramAuthorizedAmount1_90bcb21a-5125-4213-bbd8-0d92ad5acee9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockRepurchaseProgramAuthorizedAmount1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_2e5064ad-93ed-417f-9c7c-ab47ec066889" xlink:to="loc_us-gaap_StockRepurchaseProgramAuthorizedAmount1_90bcb21a-5125-4213-bbd8-0d92ad5acee9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchaseProgramPeriodInForce1_ba0b06da-0532-4606-bc84-33fb6d9017e9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockRepurchaseProgramPeriodInForce1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_2e5064ad-93ed-417f-9c7c-ab47ec066889" xlink:to="loc_us-gaap_StockRepurchaseProgramPeriodInForce1_ba0b06da-0532-4606-bc84-33fb6d9017e9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodShares_46ca2868-aed4-4d51-a0f4-83551a930950" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockRepurchasedDuringPeriodShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_2e5064ad-93ed-417f-9c7c-ab47ec066889" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodShares_46ca2868-aed4-4d51-a0f4-83551a930950" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodValue_ca94ac86-5565-46f5-9e5f-db62678fa349" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockRepurchasedDuringPeriodValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_2e5064ad-93ed-417f-9c7c-ab47ec066889" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodValue_ca94ac86-5565-46f5-9e5f-db62678fa349" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_649b202a-95cf-48f2-a7de-a802b2954322" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_2e5064ad-93ed-417f-9c7c-ab47ec066889" xlink:to="loc_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_649b202a-95cf-48f2-a7de-a802b2954322" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_ab558056-5db7-46a2-9bfc-a8fd4af7fd90" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_2e5064ad-93ed-417f-9c7c-ab47ec066889" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_ab558056-5db7-46a2-9bfc-a8fd4af7fd90" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_2be4aa04-5edf-408b-a0b2-eb83f8e6c2e8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_ab558056-5db7-46a2-9bfc-a8fd4af7fd90" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_2be4aa04-5edf-408b-a0b2-eb83f8e6c2e8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_2be4aa04-5edf-408b-a0b2-eb83f8e6c2e8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_2be4aa04-5edf-408b-a0b2-eb83f8e6c2e8" xlink:to="loc_us-gaap_EquityComponentDomain_2be4aa04-5edf-408b-a0b2-eb83f8e6c2e8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_485dfc78-00c4-4528-b4f8-4886787abd9d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_2be4aa04-5edf-408b-a0b2-eb83f8e6c2e8" xlink:to="loc_us-gaap_EquityComponentDomain_485dfc78-00c4-4528-b4f8-4886787abd9d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_21cdc206-306d-477a-ba88-a19db5f42dfe" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_485dfc78-00c4-4528-b4f8-4886787abd9d" xlink:to="loc_us-gaap_CommonStockMember_21cdc206-306d-477a-ba88-a19db5f42dfe" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareRepurchaseProgramAxis_36835cac-98c2-4a42-8d66-3ce5bbacd313" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareRepurchaseProgramAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_ab558056-5db7-46a2-9bfc-a8fd4af7fd90" xlink:to="loc_us-gaap_ShareRepurchaseProgramAxis_36835cac-98c2-4a42-8d66-3ce5bbacd313" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareRepurchaseProgramDomain_36835cac-98c2-4a42-8d66-3ce5bbacd313_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareRepurchaseProgramDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ShareRepurchaseProgramAxis_36835cac-98c2-4a42-8d66-3ce5bbacd313" xlink:to="loc_us-gaap_ShareRepurchaseProgramDomain_36835cac-98c2-4a42-8d66-3ce5bbacd313_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareRepurchaseProgramDomain_cf934a73-ffc0-4579-b740-a35ec91156fb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareRepurchaseProgramDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ShareRepurchaseProgramAxis_36835cac-98c2-4a42-8d66-3ce5bbacd313" xlink:to="loc_us-gaap_ShareRepurchaseProgramDomain_cf934a73-ffc0-4579-b740-a35ec91156fb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_A2020ShareRepurchaseProgramMember_8ef8f114-753e-41f8-a23c-d608314a7fb7" xlink:href="jbl-20210831.xsd#jbl_A2020ShareRepurchaseProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareRepurchaseProgramDomain_cf934a73-ffc0-4579-b740-a35ec91156fb" xlink:to="loc_jbl_A2020ShareRepurchaseProgramMember_8ef8f114-753e-41f8-a23c-d608314a7fb7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_A2022ShareRepurchaseProgramMember_645e81d3-7b0e-482d-8b1e-55a120469cf3" xlink:href="jbl-20210831.xsd#jbl_A2022ShareRepurchaseProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareRepurchaseProgramDomain_cf934a73-ffc0-4579-b740-a35ec91156fb" xlink:to="loc_jbl_A2022ShareRepurchaseProgramMember_645e81d3-7b0e-482d-8b1e-55a120469cf3" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jabil.com/role/ConcentrationofRiskandSegmentDataAdditionalInformationDetails" xlink:type="simple" xlink:href="jbl-20210831.xsd#ConcentrationofRiskandSegmentDataAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.jabil.com/role/ConcentrationofRiskandSegmentDataAdditionalInformationDetails" xlink:type="extended" id="ib5f89c47024841f4abe8e4dcf36d730e_ConcentrationofRiskandSegmentDataAdditionalInformationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_aba714cc-4c39-44df-b152-d50464d5f64c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EntityWideRevenueMajorCustomerLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_eb9040b1-1418-4e0f-8f6b-d66a60053a23" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConcentrationRiskPercentage1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_aba714cc-4c39-44df-b152-d50464d5f64c" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_eb9040b1-1418-4e0f-8f6b-d66a60053a23" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfOperatingSegments_10244fe8-d0b8-47a5-ba9c-077e60cf054e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NumberOfOperatingSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_aba714cc-4c39-44df-b152-d50464d5f64c" xlink:to="loc_us-gaap_NumberOfOperatingSegments_10244fe8-d0b8-47a5-ba9c-077e60cf054e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfCountriesInWhichEntityOperates_d583f5a5-ae1c-4475-97ed-f8716c0b0609" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NumberOfCountriesInWhichEntityOperates"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_aba714cc-4c39-44df-b152-d50464d5f64c" xlink:to="loc_us-gaap_NumberOfCountriesInWhichEntityOperates_d583f5a5-ae1c-4475-97ed-f8716c0b0609" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_eb50df3f-530f-44c4-8abb-7940056d2317" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_aba714cc-4c39-44df-b152-d50464d5f64c" xlink:to="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_eb50df3f-530f-44c4-8abb-7940056d2317" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_fc9bc30a-c6c1-4b96-b1c1-26b37f478b01" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConcentrationRiskByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_eb50df3f-530f-44c4-8abb-7940056d2317" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_fc9bc30a-c6c1-4b96-b1c1-26b37f478b01" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_fc9bc30a-c6c1-4b96-b1c1-26b37f478b01_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_fc9bc30a-c6c1-4b96-b1c1-26b37f478b01" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_fc9bc30a-c6c1-4b96-b1c1-26b37f478b01_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_eff38142-5479-4edf-8c62-af4a2aaacc9c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_fc9bc30a-c6c1-4b96-b1c1-26b37f478b01" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_eff38142-5479-4edf-8c62-af4a2aaacc9c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerConcentrationRiskMember_64a1838f-d9b1-4775-90ea-a8483dbd52dd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CustomerConcentrationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_eff38142-5479-4edf-8c62-af4a2aaacc9c" xlink:to="loc_us-gaap_CustomerConcentrationRiskMember_64a1838f-d9b1-4775-90ea-a8483dbd52dd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_05f328ab-52f9-44d9-8df4-579efa4e458b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_eb50df3f-530f-44c4-8abb-7940056d2317" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_05f328ab-52f9-44d9-8df4-579efa4e458b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_05f328ab-52f9-44d9-8df4-579efa4e458b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_05f328ab-52f9-44d9-8df4-579efa4e458b" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_05f328ab-52f9-44d9-8df4-579efa4e458b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_173e4f1a-60d5-4d37-93b0-fe7f2cd5a96d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_05f328ab-52f9-44d9-8df4-579efa4e458b" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_173e4f1a-60d5-4d37-93b0-fe7f2cd5a96d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesRevenueNetMember_03f8a4df-d29e-4327-bb79-c19591487639" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SalesRevenueNetMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_173e4f1a-60d5-4d37-93b0-fe7f2cd5a96d" xlink:to="loc_us-gaap_SalesRevenueNetMember_03f8a4df-d29e-4327-bb79-c19591487639" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MajorCustomersAxis_61154f7a-ce56-4066-aaa4-a3bd6bb4a8e4" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MajorCustomersAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_eb50df3f-530f-44c4-8abb-7940056d2317" xlink:to="loc_srt_MajorCustomersAxis_61154f7a-ce56-4066-aaa4-a3bd6bb4a8e4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_61154f7a-ce56-4066-aaa4-a3bd6bb4a8e4_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_MajorCustomersAxis_61154f7a-ce56-4066-aaa4-a3bd6bb4a8e4" xlink:to="loc_srt_NameOfMajorCustomerDomain_61154f7a-ce56-4066-aaa4-a3bd6bb4a8e4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_811257e2-6dd5-418c-b93e-e17d85f8f191" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_MajorCustomersAxis_61154f7a-ce56-4066-aaa4-a3bd6bb4a8e4" xlink:to="loc_srt_NameOfMajorCustomerDomain_811257e2-6dd5-418c-b93e-e17d85f8f191" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_FiveLargestCustomersMember_68b36306-7eec-41e9-8085-718bf3e7b5d4" xlink:href="jbl-20210831.xsd#jbl_FiveLargestCustomersMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_811257e2-6dd5-418c-b93e-e17d85f8f191" xlink:to="loc_jbl_FiveLargestCustomersMember_68b36306-7eec-41e9-8085-718bf3e7b5d4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_EightyTwoCustomersThatAccountFor90PercentOfTotalNetRevenueMember_cd5a6284-b5c2-4503-bc7f-e6743450ff5e" xlink:href="jbl-20210831.xsd#jbl_EightyTwoCustomersThatAccountFor90PercentOfTotalNetRevenueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_811257e2-6dd5-418c-b93e-e17d85f8f191" xlink:to="loc_jbl_EightyTwoCustomersThatAccountFor90PercentOfTotalNetRevenueMember_cd5a6284-b5c2-4503-bc7f-e6743450ff5e" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jabil.com/role/ConcentrationofRiskandSegmentDataConcentrationofRiskDetails" xlink:type="simple" xlink:href="jbl-20210831.xsd#ConcentrationofRiskandSegmentDataConcentrationofRiskDetails"/>
  <link:definitionLink xlink:role="http://www.jabil.com/role/ConcentrationofRiskandSegmentDataConcentrationofRiskDetails" xlink:type="extended" id="i400659ba0457428bbdc4555fe54205c2_ConcentrationofRiskandSegmentDataConcentrationofRiskDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_c0c53a3c-0f6c-4a2d-a3d8-4c816ea0c995" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EntityWideRevenueMajorCustomerLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_0a884fa7-48e6-4a7e-a0b0-b5c8049ce3ad" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConcentrationRiskPercentage1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_c0c53a3c-0f6c-4a2d-a3d8-4c816ea0c995" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_0a884fa7-48e6-4a7e-a0b0-b5c8049ce3ad" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_9b91ee73-e570-4d3c-b4f7-f8154e7c9d03" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_c0c53a3c-0f6c-4a2d-a3d8-4c816ea0c995" xlink:to="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_9b91ee73-e570-4d3c-b4f7-f8154e7c9d03" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_ffd0f78b-e149-4b99-925b-78b319631fbb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_9b91ee73-e570-4d3c-b4f7-f8154e7c9d03" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_ffd0f78b-e149-4b99-925b-78b319631fbb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_ffd0f78b-e149-4b99-925b-78b319631fbb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_ffd0f78b-e149-4b99-925b-78b319631fbb" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_ffd0f78b-e149-4b99-925b-78b319631fbb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_4aa2f41b-c17b-4817-849a-2848826f6c37" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_ffd0f78b-e149-4b99-925b-78b319631fbb" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_4aa2f41b-c17b-4817-849a-2848826f6c37" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesRevenueNetMember_952b47b4-e80c-4028-987a-96640fd49b1a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SalesRevenueNetMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_4aa2f41b-c17b-4817-849a-2848826f6c37" xlink:to="loc_us-gaap_SalesRevenueNetMember_952b47b4-e80c-4028-987a-96640fd49b1a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MajorCustomersAxis_2e826f0c-e13c-45dc-8e95-1cc2954e6a43" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MajorCustomersAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_9b91ee73-e570-4d3c-b4f7-f8154e7c9d03" xlink:to="loc_srt_MajorCustomersAxis_2e826f0c-e13c-45dc-8e95-1cc2954e6a43" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_2e826f0c-e13c-45dc-8e95-1cc2954e6a43_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_MajorCustomersAxis_2e826f0c-e13c-45dc-8e95-1cc2954e6a43" xlink:to="loc_srt_NameOfMajorCustomerDomain_2e826f0c-e13c-45dc-8e95-1cc2954e6a43_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_3c4e25f2-8b3d-477a-8a88-3d18548adc1f" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_MajorCustomersAxis_2e826f0c-e13c-45dc-8e95-1cc2954e6a43" xlink:to="loc_srt_NameOfMajorCustomerDomain_3c4e25f2-8b3d-477a-8a88-3d18548adc1f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_AppleIncMember_2434430a-8423-4125-877e-bd335af96695" xlink:href="jbl-20210831.xsd#jbl_AppleIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_3c4e25f2-8b3d-477a-8a88-3d18548adc1f" xlink:to="loc_jbl_AppleIncMember_2434430a-8423-4125-877e-bd335af96695" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_AmazonComMember_4aa0e930-abf1-4c59-bb46-d40f2afa9cf5" xlink:href="jbl-20210831.xsd#jbl_AmazonComMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_3c4e25f2-8b3d-477a-8a88-3d18548adc1f" xlink:to="loc_jbl_AmazonComMember_4aa0e930-abf1-4c59-bb46-d40f2afa9cf5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_d9477d1c-3ee0-4fba-aa6b-d63aad388425" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConcentrationRiskByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_9b91ee73-e570-4d3c-b4f7-f8154e7c9d03" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_d9477d1c-3ee0-4fba-aa6b-d63aad388425" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_d9477d1c-3ee0-4fba-aa6b-d63aad388425_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_d9477d1c-3ee0-4fba-aa6b-d63aad388425" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_d9477d1c-3ee0-4fba-aa6b-d63aad388425_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_cd0da9cf-bd5d-4586-bbd4-172099f13ab0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_d9477d1c-3ee0-4fba-aa6b-d63aad388425" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_cd0da9cf-bd5d-4586-bbd4-172099f13ab0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerConcentrationRiskMember_1a3f126e-b4b5-4f03-89e1-4312ca0f7c03" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CustomerConcentrationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_cd0da9cf-bd5d-4586-bbd4-172099f13ab0" xlink:to="loc_us-gaap_CustomerConcentrationRiskMember_1a3f126e-b4b5-4f03-89e1-4312ca0f7c03" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jabil.com/role/ConcentrationofRiskandSegmentDataRevenuesDisaggregatedbySegmentDetails" xlink:type="simple" xlink:href="jbl-20210831.xsd#ConcentrationofRiskandSegmentDataRevenuesDisaggregatedbySegmentDetails"/>
  <link:definitionLink xlink:role="http://www.jabil.com/role/ConcentrationofRiskandSegmentDataRevenuesDisaggregatedbySegmentDetails" xlink:type="extended" id="i3e4166a4d54a43a78b40a99182492309_ConcentrationofRiskandSegmentDataRevenuesDisaggregatedbySegmentDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_21e30dd5-cd8b-49a2-93c7-9f8956d760c9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_bb3ec6ec-0f9a-414f-b17a-a4a10284477e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_21e30dd5-cd8b-49a2-93c7-9f8956d760c9" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_bb3ec6ec-0f9a-414f-b17a-a4a10284477e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_768bd554-2891-4c48-a5d2-6e4e059d3f94" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_21e30dd5-cd8b-49a2-93c7-9f8956d760c9" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_768bd554-2891-4c48-a5d2-6e4e059d3f94" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_ab2bd20d-daf6-4086-a272-f2b0c248b5e1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_768bd554-2891-4c48-a5d2-6e4e059d3f94" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_ab2bd20d-daf6-4086-a272-f2b0c248b5e1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_ab2bd20d-daf6-4086-a272-f2b0c248b5e1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_ab2bd20d-daf6-4086-a272-f2b0c248b5e1" xlink:to="loc_us-gaap_SegmentDomain_ab2bd20d-daf6-4086-a272-f2b0c248b5e1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_c4a5a513-cba4-4909-9b3d-d8c60c866745" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_ab2bd20d-daf6-4086-a272-f2b0c248b5e1" xlink:to="loc_us-gaap_SegmentDomain_c4a5a513-cba4-4909-9b3d-d8c60c866745" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_EmsMember_0bccdc7f-b7e3-4327-ab26-cb6c6f9ae8f3" xlink:href="jbl-20210831.xsd#jbl_EmsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_c4a5a513-cba4-4909-9b3d-d8c60c866745" xlink:to="loc_jbl_EmsMember_0bccdc7f-b7e3-4327-ab26-cb6c6f9ae8f3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_DmsMember_e6be77d5-f776-4a48-986b-67d1bbbcfe7d" xlink:href="jbl-20210831.xsd#jbl_DmsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_c4a5a513-cba4-4909-9b3d-d8c60c866745" xlink:to="loc_jbl_DmsMember_e6be77d5-f776-4a48-986b-67d1bbbcfe7d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TimingOfTransferOfGoodOrServiceAxis_e93e49fa-5759-4c20-97fc-f9cbc93b8aa4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TimingOfTransferOfGoodOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_768bd554-2891-4c48-a5d2-6e4e059d3f94" xlink:to="loc_us-gaap_TimingOfTransferOfGoodOrServiceAxis_e93e49fa-5759-4c20-97fc-f9cbc93b8aa4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_e93e49fa-5759-4c20-97fc-f9cbc93b8aa4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TimingOfTransferOfGoodOrServiceDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_TimingOfTransferOfGoodOrServiceAxis_e93e49fa-5759-4c20-97fc-f9cbc93b8aa4" xlink:to="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_e93e49fa-5759-4c20-97fc-f9cbc93b8aa4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_9e6f8cbb-8a00-4890-827f-b32fa0e9fa15" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TimingOfTransferOfGoodOrServiceDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_TimingOfTransferOfGoodOrServiceAxis_e93e49fa-5759-4c20-97fc-f9cbc93b8aa4" xlink:to="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_9e6f8cbb-8a00-4890-827f-b32fa0e9fa15" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransferredAtPointInTimeMember_d5855f62-9106-4e97-8d1e-23004f044d3b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TransferredAtPointInTimeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_9e6f8cbb-8a00-4890-827f-b32fa0e9fa15" xlink:to="loc_us-gaap_TransferredAtPointInTimeMember_d5855f62-9106-4e97-8d1e-23004f044d3b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransferredOverTimeMember_376cd92b-a78e-4846-b3d0-3e3147de0aab" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TransferredOverTimeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_9e6f8cbb-8a00-4890-827f-b32fa0e9fa15" xlink:to="loc_us-gaap_TransferredOverTimeMember_376cd92b-a78e-4846-b3d0-3e3147de0aab" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jabil.com/role/ConcentrationofRiskandSegmentDataSegmentIncomeDetails" xlink:type="simple" xlink:href="jbl-20210831.xsd#ConcentrationofRiskandSegmentDataSegmentIncomeDetails"/>
  <link:definitionLink xlink:role="http://www.jabil.com/role/ConcentrationofRiskandSegmentDataSegmentIncomeDetails" xlink:type="extended" id="i3070a0e0f6bb428abc643c2cf018ff1b_ConcentrationofRiskandSegmentDataSegmentIncomeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems_2d2b536e-d953-45dd-b1ec-ced56d59213b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_aedb229f-23fe-4ddc-8fa6-e483f13ee1b2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems_2d2b536e-d953-45dd-b1ec-ced56d59213b" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_aedb229f-23fe-4ddc-8fa6-e483f13ee1b2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_ReconcilingItemsAbstract_26936ebc-ba51-4ba7-87ea-160d4aa34e89" xlink:href="jbl-20210831.xsd#jbl_ReconcilingItemsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems_2d2b536e-d953-45dd-b1ec-ced56d59213b" xlink:to="loc_jbl_ReconcilingItemsAbstract_26936ebc-ba51-4ba7-87ea-160d4aa34e89" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_2ff4c4e7-7665-4d79-ad63-5012a9cbb4c6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AmortizationOfIntangibleAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_ReconcilingItemsAbstract_26936ebc-ba51-4ba7-87ea-160d4aa34e89" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_2ff4c4e7-7665-4d79-ad63-5012a9cbb4c6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_506ef3c6-b509-40bf-9029-97d660084539" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_ReconcilingItemsAbstract_26936ebc-ba51-4ba7-87ea-160d4aa34e89" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_506ef3c6-b509-40bf-9029-97d660084539" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCharges_419e7714-c943-4449-9840-3fdebe2580aa" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_ReconcilingItemsAbstract_26936ebc-ba51-4ba7-87ea-160d4aa34e89" xlink:to="loc_us-gaap_RestructuringCharges_419e7714-c943-4449-9840-3fdebe2580aa" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_DistressedCustomerCharges_294f59da-0eb0-4ada-a835-9e2f07838d05" xlink:href="jbl-20210831.xsd#jbl_DistressedCustomerCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_ReconcilingItemsAbstract_26936ebc-ba51-4ba7-87ea-160d4aa34e89" xlink:to="loc_jbl_DistressedCustomerCharges_294f59da-0eb0-4ada-a835-9e2f07838d05" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_BusinessInterruptionAndImpairmentCharges_4f6266d9-e818-4b90-9599-d2f14702955c" xlink:href="jbl-20210831.xsd#jbl_BusinessInterruptionAndImpairmentCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_ReconcilingItemsAbstract_26936ebc-ba51-4ba7-87ea-160d4aa34e89" xlink:to="loc_jbl_BusinessInterruptionAndImpairmentCharges_4f6266d9-e818-4b90-9599-d2f14702955c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationIntegrationRelatedCosts_777ecd64-6f56-4c19-9a39-ca081544c1ab" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationIntegrationRelatedCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_ReconcilingItemsAbstract_26936ebc-ba51-4ba7-87ea-160d4aa34e89" xlink:to="loc_us-gaap_BusinessCombinationIntegrationRelatedCosts_777ecd64-6f56-4c19-9a39-ca081544c1ab" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_GainLossOnSecurities_69829dba-c0bd-4686-86bb-5f4cfad28bb7" xlink:href="jbl-20210831.xsd#jbl_GainLossOnSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_ReconcilingItemsAbstract_26936ebc-ba51-4ba7-87ea-160d4aa34e89" xlink:to="loc_jbl_GainLossOnSecurities_69829dba-c0bd-4686-86bb-5f4cfad28bb7" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_OtherExpenseNetOfPeriodicBenefitCost_fd8d55a5-6069-4f26-9002-89584b9b2c77" xlink:href="jbl-20210831.xsd#jbl_OtherExpenseNetOfPeriodicBenefitCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_ReconcilingItemsAbstract_26936ebc-ba51-4ba7-87ea-160d4aa34e89" xlink:to="loc_jbl_OtherExpenseNetOfPeriodicBenefitCost_fd8d55a5-6069-4f26-9002-89584b9b2c77" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIncomeInterest_cad296ab-bb84-425a-b6e3-12cfc59f3536" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InvestmentIncomeInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_ReconcilingItemsAbstract_26936ebc-ba51-4ba7-87ea-160d4aa34e89" xlink:to="loc_us-gaap_InvestmentIncomeInterest_cad296ab-bb84-425a-b6e3-12cfc59f3536" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpense_7049a84a-dc84-4d16-8a31-c566aa333661" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InterestExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jbl_ReconcilingItemsAbstract_26936ebc-ba51-4ba7-87ea-160d4aa34e89" xlink:to="loc_us-gaap_InterestExpense_7049a84a-dc84-4d16-8a31-c566aa333661" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable_dba6486b-1077-4c0c-b052-25584157bfad" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems_2d2b536e-d953-45dd-b1ec-ced56d59213b" xlink:to="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable_dba6486b-1077-4c0c-b052-25584157bfad" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_80968aeb-5bd1-4305-aa42-f98b6a71f506" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable_dba6486b-1077-4c0c-b052-25584157bfad" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_80968aeb-5bd1-4305-aa42-f98b6a71f506" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_80968aeb-5bd1-4305-aa42-f98b6a71f506_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_80968aeb-5bd1-4305-aa42-f98b6a71f506" xlink:to="loc_us-gaap_SegmentDomain_80968aeb-5bd1-4305-aa42-f98b6a71f506_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_c6e03944-8723-4d54-aa4e-f3de9a8dfc5e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_80968aeb-5bd1-4305-aa42-f98b6a71f506" xlink:to="loc_us-gaap_SegmentDomain_c6e03944-8723-4d54-aa4e-f3de9a8dfc5e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_EmsMember_247e5b97-d9f2-423b-a50a-674123cf15db" xlink:href="jbl-20210831.xsd#jbl_EmsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_c6e03944-8723-4d54-aa4e-f3de9a8dfc5e" xlink:to="loc_jbl_EmsMember_247e5b97-d9f2-423b-a50a-674123cf15db" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_DmsMember_694c6800-222f-4a41-a528-cd7c234c7322" xlink:href="jbl-20210831.xsd#jbl_DmsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_c6e03944-8723-4d54-aa4e-f3de9a8dfc5e" xlink:to="loc_jbl_DmsMember_694c6800-222f-4a41-a528-cd7c234c7322" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_64e9a219-101e-4d06-9469-f605f5613960" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable_dba6486b-1077-4c0c-b052-25584157bfad" xlink:to="loc_srt_ConsolidationItemsAxis_64e9a219-101e-4d06-9469-f605f5613960" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_64e9a219-101e-4d06-9469-f605f5613960_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_64e9a219-101e-4d06-9469-f605f5613960" xlink:to="loc_srt_ConsolidationItemsDomain_64e9a219-101e-4d06-9469-f605f5613960_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_a9db4fac-a798-47ec-abf2-adbf44c8966c" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_64e9a219-101e-4d06-9469-f605f5613960" xlink:to="loc_srt_ConsolidationItemsDomain_a9db4fac-a798-47ec-abf2-adbf44c8966c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_63bb57d5-714c-483b-a213-362d17484227" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_a9db4fac-a798-47ec-abf2-adbf44c8966c" xlink:to="loc_us-gaap_OperatingSegmentsMember_63bb57d5-714c-483b-a213-362d17484227" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MaterialReconcilingItemsMember_8f11b100-7e91-4916-96cd-7de0fe302d71" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_MaterialReconcilingItemsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_a9db4fac-a798-47ec-abf2-adbf44c8966c" xlink:to="loc_us-gaap_MaterialReconcilingItemsMember_8f11b100-7e91-4916-96cd-7de0fe302d71" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jabil.com/role/ConcentrationofRiskandSegmentDataSegmentAssetsDetails" xlink:type="simple" xlink:href="jbl-20210831.xsd#ConcentrationofRiskandSegmentDataSegmentAssetsDetails"/>
  <link:definitionLink xlink:role="http://www.jabil.com/role/ConcentrationofRiskandSegmentDataSegmentAssetsDetails" xlink:type="extended" id="i9337f347d51743449efbe2be50b46bbf_ConcentrationofRiskandSegmentDataSegmentAssetsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingAssetReconcilingItemLineItems_ad9a49c3-3471-42a5-8665-4fccf78cff6a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentReportingAssetReconcilingItemLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_7f98eeca-90cf-47cc-97f5-08eff09d9a3b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingAssetReconcilingItemLineItems_ad9a49c3-3471-42a5-8665-4fccf78cff6a" xlink:to="loc_us-gaap_Assets_7f98eeca-90cf-47cc-97f5-08eff09d9a3b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReconciliationOfAssetsFromSegmentToConsolidatedTable_65ba6cd8-1c63-4284-b2aa-c6aaf11bc6c5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ReconciliationOfAssetsFromSegmentToConsolidatedTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingAssetReconcilingItemLineItems_ad9a49c3-3471-42a5-8665-4fccf78cff6a" xlink:to="loc_us-gaap_ReconciliationOfAssetsFromSegmentToConsolidatedTable_65ba6cd8-1c63-4284-b2aa-c6aaf11bc6c5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_a0485577-6f70-4b1a-a38a-06c0deab64b8" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ReconciliationOfAssetsFromSegmentToConsolidatedTable_65ba6cd8-1c63-4284-b2aa-c6aaf11bc6c5" xlink:to="loc_srt_ConsolidationItemsAxis_a0485577-6f70-4b1a-a38a-06c0deab64b8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_a0485577-6f70-4b1a-a38a-06c0deab64b8_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_a0485577-6f70-4b1a-a38a-06c0deab64b8" xlink:to="loc_srt_ConsolidationItemsDomain_a0485577-6f70-4b1a-a38a-06c0deab64b8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_147002de-0dad-498e-8b22-a59b61cac555" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_a0485577-6f70-4b1a-a38a-06c0deab64b8" xlink:to="loc_srt_ConsolidationItemsDomain_147002de-0dad-498e-8b22-a59b61cac555" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_692278b1-c37e-4d26-8a17-0fdb3d9e22eb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_147002de-0dad-498e-8b22-a59b61cac555" xlink:to="loc_us-gaap_OperatingSegmentsMember_692278b1-c37e-4d26-8a17-0fdb3d9e22eb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateNonSegmentMember_8c162647-31e2-44b5-88f5-5fa0a1855b39" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CorporateNonSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_147002de-0dad-498e-8b22-a59b61cac555" xlink:to="loc_us-gaap_CorporateNonSegmentMember_8c162647-31e2-44b5-88f5-5fa0a1855b39" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_b66d7ca8-10ad-4687-b47d-5d68dfe03055" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ReconciliationOfAssetsFromSegmentToConsolidatedTable_65ba6cd8-1c63-4284-b2aa-c6aaf11bc6c5" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_b66d7ca8-10ad-4687-b47d-5d68dfe03055" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_b66d7ca8-10ad-4687-b47d-5d68dfe03055_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_b66d7ca8-10ad-4687-b47d-5d68dfe03055" xlink:to="loc_us-gaap_SegmentDomain_b66d7ca8-10ad-4687-b47d-5d68dfe03055_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_9e8d556d-f504-41d3-bf35-5680782b096d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_b66d7ca8-10ad-4687-b47d-5d68dfe03055" xlink:to="loc_us-gaap_SegmentDomain_9e8d556d-f504-41d3-bf35-5680782b096d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_EmsMember_a6e81ab1-3fd8-460f-afff-1f284ebcc55d" xlink:href="jbl-20210831.xsd#jbl_EmsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_9e8d556d-f504-41d3-bf35-5680782b096d" xlink:to="loc_jbl_EmsMember_a6e81ab1-3fd8-460f-afff-1f284ebcc55d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_DmsMember_e8ec4c8e-fec0-4dc6-84d7-267a2e6950db" xlink:href="jbl-20210831.xsd#jbl_DmsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_9e8d556d-f504-41d3-bf35-5680782b096d" xlink:to="loc_jbl_DmsMember_e8ec4c8e-fec0-4dc6-84d7-267a2e6950db" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jabil.com/role/ConcentrationofRiskandSegmentDataExternalNetRevenueDetails" xlink:type="simple" xlink:href="jbl-20210831.xsd#ConcentrationofRiskandSegmentDataExternalNetRevenueDetails"/>
  <link:definitionLink xlink:role="http://www.jabil.com/role/ConcentrationofRiskandSegmentDataExternalNetRevenueDetails" xlink:type="extended" id="ie06034713c934ee59861429219160daf_ConcentrationofRiskandSegmentDataExternalNetRevenueDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_acb4aa76-5457-4c3e-8c7c-6c3ed419b034" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_5222aee7-0e7d-47b6-b3b5-9e38e1d10e4a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_acb4aa76-5457-4c3e-8c7c-6c3ed419b034" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_5222aee7-0e7d-47b6-b3b5-9e38e1d10e4a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_8013b4c6-fd88-4b61-b3d3-4daf3461c02d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_acb4aa76-5457-4c3e-8c7c-6c3ed419b034" xlink:to="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_8013b4c6-fd88-4b61-b3d3-4daf3461c02d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_6568fb07-f009-4ed0-ab66-fd5b30554246" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_8013b4c6-fd88-4b61-b3d3-4daf3461c02d" xlink:to="loc_srt_StatementGeographicalAxis_6568fb07-f009-4ed0-ab66-fd5b30554246" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_6568fb07-f009-4ed0-ab66-fd5b30554246_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_6568fb07-f009-4ed0-ab66-fd5b30554246" xlink:to="loc_srt_SegmentGeographicalDomain_6568fb07-f009-4ed0-ab66-fd5b30554246_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_3f51d8e4-73f2-4d95-8149-ea6fcc1f7398" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_6568fb07-f009-4ed0-ab66-fd5b30554246" xlink:to="loc_srt_SegmentGeographicalDomain_3f51d8e4-73f2-4d95-8149-ea6fcc1f7398" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonUsMember_ed8e8bce-f971-45d0-8695-b9c7d83f00bf" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NonUsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_3f51d8e4-73f2-4d95-8149-ea6fcc1f7398" xlink:to="loc_us-gaap_NonUsMember_ed8e8bce-f971-45d0-8695-b9c7d83f00bf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_SG_eeb1dafd-8ec9-4874-a1f8-77020c3444e4" xlink:href="https://xbrl.sec.gov/country/2021/country-2021.xsd#country_SG"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonUsMember_ed8e8bce-f971-45d0-8695-b9c7d83f00bf" xlink:to="loc_country_SG_eeb1dafd-8ec9-4874-a1f8-77020c3444e4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_CN_06894d41-472b-4886-9d0f-059d0d3ec2ec" xlink:href="https://xbrl.sec.gov/country/2021/country-2021.xsd#country_CN"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonUsMember_ed8e8bce-f971-45d0-8695-b9c7d83f00bf" xlink:to="loc_country_CN_06894d41-472b-4886-9d0f-059d0d3ec2ec" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_MX_8ab690b4-b7af-4f65-a7f4-eece91c7259d" xlink:href="https://xbrl.sec.gov/country/2021/country-2021.xsd#country_MX"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonUsMember_ed8e8bce-f971-45d0-8695-b9c7d83f00bf" xlink:to="loc_country_MX_8ab690b4-b7af-4f65-a7f4-eece91c7259d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_MY_d94029f3-9896-49c0-ae83-70cc77e3aba5" xlink:href="https://xbrl.sec.gov/country/2021/country-2021.xsd#country_MY"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonUsMember_ed8e8bce-f971-45d0-8695-b9c7d83f00bf" xlink:to="loc_country_MY_d94029f3-9896-49c0-ae83-70cc77e3aba5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_HU_da3eaf54-5133-46b6-934f-1d37cb6d3699" xlink:href="https://xbrl.sec.gov/country/2021/country-2021.xsd#country_HU"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonUsMember_ed8e8bce-f971-45d0-8695-b9c7d83f00bf" xlink:to="loc_country_HU_da3eaf54-5133-46b6-934f-1d37cb6d3699" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_OtherCountriesMember_c143b44b-d17a-41b7-a157-3aebdd0867b4" xlink:href="jbl-20210831.xsd#jbl_OtherCountriesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonUsMember_ed8e8bce-f971-45d0-8695-b9c7d83f00bf" xlink:to="loc_jbl_OtherCountriesMember_c143b44b-d17a-41b7-a157-3aebdd0867b4" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_50157bbf-8d16-4125-add4-e22a8b7a92e6" xlink:href="https://xbrl.sec.gov/country/2021/country-2021.xsd#country_US"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_3f51d8e4-73f2-4d95-8149-ea6fcc1f7398" xlink:to="loc_country_US_50157bbf-8d16-4125-add4-e22a8b7a92e6" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jabil.com/role/ConcentrationofRiskandSegmentDataLonglivedAssetsDetails" xlink:type="simple" xlink:href="jbl-20210831.xsd#ConcentrationofRiskandSegmentDataLonglivedAssetsDetails"/>
  <link:definitionLink xlink:role="http://www.jabil.com/role/ConcentrationofRiskandSegmentDataLonglivedAssetsDetails" xlink:type="extended" id="i50f2e8f028aa4864a14b1c9904fea246_ConcentrationofRiskandSegmentDataLonglivedAssetsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_0bd52d30-0bb6-4e63-813b-bee99b3f5ce4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncurrentAssets_035faec8-0d31-4585-81eb-0b075a8c07b7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NoncurrentAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_0bd52d30-0bb6-4e63-813b-bee99b3f5ce4" xlink:to="loc_us-gaap_NoncurrentAssets_035faec8-0d31-4585-81eb-0b075a8c07b7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_d03d59de-0cc7-400d-bd59-b27eaa549a62" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_0bd52d30-0bb6-4e63-813b-bee99b3f5ce4" xlink:to="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_d03d59de-0cc7-400d-bd59-b27eaa549a62" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_2ef119ae-7ba3-4fca-b57d-e41f2be56b83" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_d03d59de-0cc7-400d-bd59-b27eaa549a62" xlink:to="loc_srt_StatementGeographicalAxis_2ef119ae-7ba3-4fca-b57d-e41f2be56b83" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_2ef119ae-7ba3-4fca-b57d-e41f2be56b83_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_2ef119ae-7ba3-4fca-b57d-e41f2be56b83" xlink:to="loc_srt_SegmentGeographicalDomain_2ef119ae-7ba3-4fca-b57d-e41f2be56b83_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_9504d2bc-faf7-4ba0-b17f-8a7b207a9eb1" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_2ef119ae-7ba3-4fca-b57d-e41f2be56b83" xlink:to="loc_srt_SegmentGeographicalDomain_9504d2bc-faf7-4ba0-b17f-8a7b207a9eb1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonUsMember_f6ac8dde-fde1-4c5c-935f-378ef9bb519f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NonUsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_9504d2bc-faf7-4ba0-b17f-8a7b207a9eb1" xlink:to="loc_us-gaap_NonUsMember_f6ac8dde-fde1-4c5c-935f-378ef9bb519f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_CN_881a86f9-f240-4913-a55c-eb90e53fc648" xlink:href="https://xbrl.sec.gov/country/2021/country-2021.xsd#country_CN"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonUsMember_f6ac8dde-fde1-4c5c-935f-378ef9bb519f" xlink:to="loc_country_CN_881a86f9-f240-4913-a55c-eb90e53fc648" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_MX_60c0bda1-7739-45bb-aa6b-dbfd35492291" xlink:href="https://xbrl.sec.gov/country/2021/country-2021.xsd#country_MX"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonUsMember_f6ac8dde-fde1-4c5c-935f-378ef9bb519f" xlink:to="loc_country_MX_60c0bda1-7739-45bb-aa6b-dbfd35492291" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_MY_c0f22184-9cfe-44a1-8103-388f83ec2196" xlink:href="https://xbrl.sec.gov/country/2021/country-2021.xsd#country_MY"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonUsMember_f6ac8dde-fde1-4c5c-935f-378ef9bb519f" xlink:to="loc_country_MY_c0f22184-9cfe-44a1-8103-388f83ec2196" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_CH_4ca1cc4d-ca1f-49e9-a403-9897d0bda8a4" xlink:href="https://xbrl.sec.gov/country/2021/country-2021.xsd#country_CH"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonUsMember_f6ac8dde-fde1-4c5c-935f-378ef9bb519f" xlink:to="loc_country_CH_4ca1cc4d-ca1f-49e9-a403-9897d0bda8a4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_SG_9e062b3f-6d12-4c0e-a73b-e532296d2d74" xlink:href="https://xbrl.sec.gov/country/2021/country-2021.xsd#country_SG"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonUsMember_f6ac8dde-fde1-4c5c-935f-378ef9bb519f" xlink:to="loc_country_SG_9e062b3f-6d12-4c0e-a73b-e532296d2d74" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_HU_ddc18f19-a918-4f34-a18b-2e70fff7a731" xlink:href="https://xbrl.sec.gov/country/2021/country-2021.xsd#country_HU"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonUsMember_f6ac8dde-fde1-4c5c-935f-378ef9bb519f" xlink:to="loc_country_HU_ddc18f19-a918-4f34-a18b-2e70fff7a731" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_TW_47c4301c-adf7-404e-bce6-360a5666c813" xlink:href="https://xbrl.sec.gov/country/2021/country-2021.xsd#country_TW"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonUsMember_f6ac8dde-fde1-4c5c-935f-378ef9bb519f" xlink:to="loc_country_TW_47c4301c-adf7-404e-bce6-360a5666c813" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_VN_f9f55cb1-d881-4b94-850a-47128ed32973" xlink:href="https://xbrl.sec.gov/country/2021/country-2021.xsd#country_VN"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonUsMember_f6ac8dde-fde1-4c5c-935f-378ef9bb519f" xlink:to="loc_country_VN_f9f55cb1-d881-4b94-850a-47128ed32973" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_OtherCountriesMember_8a146e74-38e9-4f7c-9844-833ca15d733c" xlink:href="jbl-20210831.xsd#jbl_OtherCountriesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonUsMember_f6ac8dde-fde1-4c5c-935f-378ef9bb519f" xlink:to="loc_jbl_OtherCountriesMember_8a146e74-38e9-4f7c-9844-833ca15d733c" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_5add14a1-188d-4d8c-a91c-243cb88774dc" xlink:href="https://xbrl.sec.gov/country/2021/country-2021.xsd#country_US"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_9504d2bc-faf7-4ba0-b17f-8a7b207a9eb1" xlink:to="loc_country_US_5add14a1-188d-4d8c-a91c-243cb88774dc" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jabil.com/role/RestructuringSeveranceandRelatedChargesSummaryofRestructuringandRelatedChargesDetails" xlink:type="simple" xlink:href="jbl-20210831.xsd#RestructuringSeveranceandRelatedChargesSummaryofRestructuringandRelatedChargesDetails"/>
  <link:definitionLink xlink:role="http://www.jabil.com/role/RestructuringSeveranceandRelatedChargesSummaryofRestructuringandRelatedChargesDetails" xlink:type="extended" id="i0fa66c727dbd42e29a33f555170cda85_RestructuringSeveranceandRelatedChargesSummaryofRestructuringandRelatedChargesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_8050008f-4fe9-4d9f-a4e6-b22f27e447ff" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringCostAndReserveLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCharges_10c13cbd-a526-4779-9184-70829aaf84f0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_8050008f-4fe9-4d9f-a4e6-b22f27e447ff" xlink:to="loc_us-gaap_RestructuringCharges_10c13cbd-a526-4779-9184-70829aaf84f0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_bf4e4624-9497-47d8-9891-5eff2096f0da" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_8050008f-4fe9-4d9f-a4e6-b22f27e447ff" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_bf4e4624-9497-47d8-9891-5eff2096f0da" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveAxis_51b67232-2e98-40ee-a591-1c355d3d28ac" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringCostAndReserveAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_bf4e4624-9497-47d8-9891-5eff2096f0da" xlink:to="loc_us-gaap_RestructuringCostAndReserveAxis_51b67232-2e98-40ee-a591-1c355d3d28ac" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_51b67232-2e98-40ee-a591-1c355d3d28ac_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_51b67232-2e98-40ee-a591-1c355d3d28ac" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_51b67232-2e98-40ee-a591-1c355d3d28ac_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_407f807f-bf88-4ed8-a2de-f174fdbb81af" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_51b67232-2e98-40ee-a591-1c355d3d28ac" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_407f807f-bf88-4ed8-a2de-f174fdbb81af" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeSeveranceMember_15b475a6-c50e-4bfa-b103-fc0db21a90c9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EmployeeSeveranceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_407f807f-bf88-4ed8-a2de-f174fdbb81af" xlink:to="loc_us-gaap_EmployeeSeveranceMember_15b475a6-c50e-4bfa-b103-fc0db21a90c9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_LeaseCostsMember_a098b34d-b29d-4663-9f0b-f4861b2926e2" xlink:href="jbl-20210831.xsd#jbl_LeaseCostsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_407f807f-bf88-4ed8-a2de-f174fdbb81af" xlink:to="loc_jbl_LeaseCostsMember_a098b34d-b29d-4663-9f0b-f4861b2926e2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_AssetWriteOffMember_a58680df-639c-4761-b05c-7c63337dcf48" xlink:href="jbl-20210831.xsd#jbl_AssetWriteOffMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_407f807f-bf88-4ed8-a2de-f174fdbb81af" xlink:to="loc_jbl_AssetWriteOffMember_a58680df-639c-4761-b05c-7c63337dcf48" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_OtherNonAllocatedChargesMember_95a8ed50-59eb-41c9-ae82-e474ff307302" xlink:href="jbl-20210831.xsd#jbl_OtherNonAllocatedChargesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_407f807f-bf88-4ed8-a2de-f174fdbb81af" xlink:to="loc_jbl_OtherNonAllocatedChargesMember_95a8ed50-59eb-41c9-ae82-e474ff307302" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanAxis_e7abdcaa-5c3e-4323-a641-bea05ecabf2c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringPlanAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_bf4e4624-9497-47d8-9891-5eff2096f0da" xlink:to="loc_us-gaap_RestructuringPlanAxis_e7abdcaa-5c3e-4323-a641-bea05ecabf2c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanDomain_e7abdcaa-5c3e-4323-a641-bea05ecabf2c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringPlanDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringPlanAxis_e7abdcaa-5c3e-4323-a641-bea05ecabf2c" xlink:to="loc_us-gaap_RestructuringPlanDomain_e7abdcaa-5c3e-4323-a641-bea05ecabf2c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanDomain_7b4edbe5-d7a8-48e9-a69a-8dc2cb54a963" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringPlanDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringPlanAxis_e7abdcaa-5c3e-4323-a641-bea05ecabf2c" xlink:to="loc_us-gaap_RestructuringPlanDomain_7b4edbe5-d7a8-48e9-a69a-8dc2cb54a963" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_ReductionInWorldwideWorkforceMember_584ebb4b-5446-43c5-b75a-d56807c84e44" xlink:href="jbl-20210831.xsd#jbl_ReductionInWorldwideWorkforceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringPlanDomain_7b4edbe5-d7a8-48e9-a69a-8dc2cb54a963" xlink:to="loc_jbl_ReductionInWorldwideWorkforceMember_584ebb4b-5446-43c5-b75a-d56807c84e44" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_34039cd0-45b2-405a-8ac1-4f2c8ef9e5e1" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_bf4e4624-9497-47d8-9891-5eff2096f0da" xlink:to="loc_srt_ConsolidationItemsAxis_34039cd0-45b2-405a-8ac1-4f2c8ef9e5e1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_34039cd0-45b2-405a-8ac1-4f2c8ef9e5e1_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_34039cd0-45b2-405a-8ac1-4f2c8ef9e5e1" xlink:to="loc_srt_ConsolidationItemsDomain_34039cd0-45b2-405a-8ac1-4f2c8ef9e5e1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_2e0ce622-5a33-4fbd-a1d1-c9ffce194b65" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_34039cd0-45b2-405a-8ac1-4f2c8ef9e5e1" xlink:to="loc_srt_ConsolidationItemsDomain_2e0ce622-5a33-4fbd-a1d1-c9ffce194b65" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_8ac822fd-2245-4bfe-a8fe-fca6fbbfeba9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_2e0ce622-5a33-4fbd-a1d1-c9ffce194b65" xlink:to="loc_us-gaap_OperatingSegmentsMember_8ac822fd-2245-4bfe-a8fe-fca6fbbfeba9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateNonSegmentMember_66836514-927a-488c-b61b-dba2c0915b09" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CorporateNonSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_2e0ce622-5a33-4fbd-a1d1-c9ffce194b65" xlink:to="loc_us-gaap_CorporateNonSegmentMember_66836514-927a-488c-b61b-dba2c0915b09" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_ee77b886-c637-40be-94e4-6d08d3e1fec0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_bf4e4624-9497-47d8-9891-5eff2096f0da" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_ee77b886-c637-40be-94e4-6d08d3e1fec0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_ee77b886-c637-40be-94e4-6d08d3e1fec0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_ee77b886-c637-40be-94e4-6d08d3e1fec0" xlink:to="loc_us-gaap_SegmentDomain_ee77b886-c637-40be-94e4-6d08d3e1fec0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_0f26ea48-45b3-4ab3-857d-3795f212caa9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_ee77b886-c637-40be-94e4-6d08d3e1fec0" xlink:to="loc_us-gaap_SegmentDomain_0f26ea48-45b3-4ab3-857d-3795f212caa9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_EmsMember_3a52f34f-5331-4d2c-9e64-9ae5394cbe7e" xlink:href="jbl-20210831.xsd#jbl_EmsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_0f26ea48-45b3-4ab3-857d-3795f212caa9" xlink:to="loc_jbl_EmsMember_3a52f34f-5331-4d2c-9e64-9ae5394cbe7e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_DmsMember_0e5124a7-ba92-4bbd-ab3d-ea85dc1206d1" xlink:href="jbl-20210831.xsd#jbl_DmsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_0f26ea48-45b3-4ab3-857d-3795f212caa9" xlink:to="loc_jbl_DmsMember_0e5124a7-ba92-4bbd-ab3d-ea85dc1206d1" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jabil.com/role/RestructuringSeveranceandRelatedChargesAdditionalInformationDetails" xlink:type="simple" xlink:href="jbl-20210831.xsd#RestructuringSeveranceandRelatedChargesAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.jabil.com/role/RestructuringSeveranceandRelatedChargesAdditionalInformationDetails" xlink:type="extended" id="i4f5cdd55fdb74150a9950a6a4e721152_RestructuringSeveranceandRelatedChargesAdditionalInformationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_5133fda2-8224-4508-a4a7-b2332b844f05" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringCostAndReserveLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringAndRelatedCostExpectedCost1_e4814935-697c-450a-81c3-f3e48b4cd23e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringAndRelatedCostExpectedCost1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_5133fda2-8224-4508-a4a7-b2332b844f05" xlink:to="loc_us-gaap_RestructuringAndRelatedCostExpectedCost1_e4814935-697c-450a-81c3-f3e48b4cd23e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_c46c548d-ccb6-43b8-b8da-2b0baa376a16" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_5133fda2-8224-4508-a4a7-b2332b844f05" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_c46c548d-ccb6-43b8-b8da-2b0baa376a16" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanAxis_cf351b56-9b0d-421e-a0e1-6332f6017b3f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringPlanAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_c46c548d-ccb6-43b8-b8da-2b0baa376a16" xlink:to="loc_us-gaap_RestructuringPlanAxis_cf351b56-9b0d-421e-a0e1-6332f6017b3f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanDomain_cf351b56-9b0d-421e-a0e1-6332f6017b3f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringPlanDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringPlanAxis_cf351b56-9b0d-421e-a0e1-6332f6017b3f" xlink:to="loc_us-gaap_RestructuringPlanDomain_cf351b56-9b0d-421e-a0e1-6332f6017b3f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanDomain_c3d7a26a-7688-44b4-8054-447af4114b66" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringPlanDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringPlanAxis_cf351b56-9b0d-421e-a0e1-6332f6017b3f" xlink:to="loc_us-gaap_RestructuringPlanDomain_c3d7a26a-7688-44b4-8054-447af4114b66" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_A2020RestructuringPlanMember_3037a3d8-325d-427a-b9ea-ec3b258e464a" xlink:href="jbl-20210831.xsd#jbl_A2020RestructuringPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringPlanDomain_c3d7a26a-7688-44b4-8054-447af4114b66" xlink:to="loc_jbl_A2020RestructuringPlanMember_3037a3d8-325d-427a-b9ea-ec3b258e464a" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jabil.com/role/RestructuringSeveranceandRelatedChargesLiabilityActivityDetails" xlink:type="simple" xlink:href="jbl-20210831.xsd#RestructuringSeveranceandRelatedChargesLiabilityActivityDetails"/>
  <link:definitionLink xlink:role="http://www.jabil.com/role/RestructuringSeveranceandRelatedChargesLiabilityActivityDetails" xlink:type="extended" id="ifd4847f6c49c4568a17368240a48f6be_RestructuringSeveranceandRelatedChargesLiabilityActivityDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_815ac86b-b447-4fdb-acea-e15a42dd3d12" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringCostAndReserveLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserveRollForward_7f940bae-aa55-46a1-8676-f4aef05e7acb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringReserveRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_815ac86b-b447-4fdb-acea-e15a42dd3d12" xlink:to="loc_us-gaap_RestructuringReserveRollForward_7f940bae-aa55-46a1-8676-f4aef05e7acb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserve_e6ebbf5d-4150-4a2c-8ae9-15cf63851066" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringReserve"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_7f940bae-aa55-46a1-8676-f4aef05e7acb" xlink:to="loc_us-gaap_RestructuringReserve_e6ebbf5d-4150-4a2c-8ae9-15cf63851066" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCharges_429b0432-4650-4a3d-a847-42e9fbd270a6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_7f940bae-aa55-46a1-8676-f4aef05e7acb" xlink:to="loc_us-gaap_RestructuringCharges_429b0432-4650-4a3d-a847-42e9fbd270a6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_RestructuringChargesAssetWriteOffAndOtherNonCashCostsCredits_76d0bea2-4802-461c-af70-8d04dbb4a2f7" xlink:href="jbl-20210831.xsd#jbl_RestructuringChargesAssetWriteOffAndOtherNonCashCostsCredits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_7f940bae-aa55-46a1-8676-f4aef05e7acb" xlink:to="loc_jbl_RestructuringChargesAssetWriteOffAndOtherNonCashCostsCredits_76d0bea2-4802-461c-af70-8d04dbb4a2f7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForRestructuring_93d5bfb3-0228-4aa2-8e36-cfae2b638e68" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsForRestructuring"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_7f940bae-aa55-46a1-8676-f4aef05e7acb" xlink:to="loc_us-gaap_PaymentsForRestructuring_93d5bfb3-0228-4aa2-8e36-cfae2b638e68" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserve_39e0e754-e5e2-4d55-895e-9a60e48667f4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringReserve"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_dc361b02-3d27-40cf-b3db-f4a2d45699cf" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_815ac86b-b447-4fdb-acea-e15a42dd3d12" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_dc361b02-3d27-40cf-b3db-f4a2d45699cf" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanAxis_d50c91d4-6128-48c5-9aa9-7119d3d5ab2a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringPlanAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_dc361b02-3d27-40cf-b3db-f4a2d45699cf" xlink:to="loc_us-gaap_RestructuringPlanAxis_d50c91d4-6128-48c5-9aa9-7119d3d5ab2a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanDomain_d50c91d4-6128-48c5-9aa9-7119d3d5ab2a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringPlanDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringPlanAxis_d50c91d4-6128-48c5-9aa9-7119d3d5ab2a" xlink:to="loc_us-gaap_RestructuringPlanDomain_d50c91d4-6128-48c5-9aa9-7119d3d5ab2a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanDomain_ddcd980a-10a1-410d-8fc8-0ecd10ed86cd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringPlanDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringPlanAxis_d50c91d4-6128-48c5-9aa9-7119d3d5ab2a" xlink:to="loc_us-gaap_RestructuringPlanDomain_ddcd980a-10a1-410d-8fc8-0ecd10ed86cd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_A2020RestructuringPlanMember_2db7fb3d-35ef-4fa2-8a1c-7d497dc63a1c" xlink:href="jbl-20210831.xsd#jbl_A2020RestructuringPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringPlanDomain_ddcd980a-10a1-410d-8fc8-0ecd10ed86cd" xlink:to="loc_jbl_A2020RestructuringPlanMember_2db7fb3d-35ef-4fa2-8a1c-7d497dc63a1c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveAxis_98e7f372-98b0-41cb-8653-16f85fa46543" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringCostAndReserveAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_dc361b02-3d27-40cf-b3db-f4a2d45699cf" xlink:to="loc_us-gaap_RestructuringCostAndReserveAxis_98e7f372-98b0-41cb-8653-16f85fa46543" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_98e7f372-98b0-41cb-8653-16f85fa46543_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_98e7f372-98b0-41cb-8653-16f85fa46543" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_98e7f372-98b0-41cb-8653-16f85fa46543_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_d79cecab-3e67-401f-99c8-f0b54331a7ca" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_98e7f372-98b0-41cb-8653-16f85fa46543" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_d79cecab-3e67-401f-99c8-f0b54331a7ca" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeSeveranceMember_525c4082-c2da-4125-9e79-a836ba60359a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EmployeeSeveranceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_d79cecab-3e67-401f-99c8-f0b54331a7ca" xlink:to="loc_us-gaap_EmployeeSeveranceMember_525c4082-c2da-4125-9e79-a836ba60359a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_LeaseCostsMember_0b0fcd81-c99c-4eb9-9712-cc6d3919ef37" xlink:href="jbl-20210831.xsd#jbl_LeaseCostsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_d79cecab-3e67-401f-99c8-f0b54331a7ca" xlink:to="loc_jbl_LeaseCostsMember_0b0fcd81-c99c-4eb9-9712-cc6d3919ef37" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_AssetWriteOffMember_00265455-a307-4fa0-b193-99da8fe8d8ae" xlink:href="jbl-20210831.xsd#jbl_AssetWriteOffMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_d79cecab-3e67-401f-99c8-f0b54331a7ca" xlink:to="loc_jbl_AssetWriteOffMember_00265455-a307-4fa0-b193-99da8fe8d8ae" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherRestructuringMember_71954dbc-050b-42ef-9abf-6cb4bc3e13d6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherRestructuringMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_d79cecab-3e67-401f-99c8-f0b54331a7ca" xlink:to="loc_us-gaap_OtherRestructuringMember_71954dbc-050b-42ef-9abf-6cb4bc3e13d6" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jabil.com/role/IncomeTaxesTaxCarryforwardsDetails" xlink:type="simple" xlink:href="jbl-20210831.xsd#IncomeTaxesTaxCarryforwardsDetails"/>
  <link:definitionLink xlink:role="http://www.jabil.com/role/IncomeTaxesTaxCarryforwardsDetails" xlink:type="extended" id="i02746310a5344b49bcf26f443582e210_IncomeTaxesTaxCarryforwardsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLossCarryforwardsLineItems_4922f0c2-e243-4af4-8d33-c8ba265ffbff" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLossCarryforwardsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLossCarryforwards_2f4ca435-eb8b-4e03-ba92-b9aa52947f33" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLossCarryforwards"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_4922f0c2-e243-4af4-8d33-c8ba265ffbff" xlink:to="loc_us-gaap_OperatingLossCarryforwards_2f4ca435-eb8b-4e03-ba92-b9aa52947f33" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxCreditCarryforwardAmount_b51663d4-ab83-44ae-a661-d8b309e0a5a7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TaxCreditCarryforwardAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_4922f0c2-e243-4af4-8d33-c8ba265ffbff" xlink:to="loc_us-gaap_TaxCreditCarryforwardAmount_b51663d4-ab83-44ae-a661-d8b309e0a5a7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLossCarryforwardsTable_2a51d2ab-4390-4c0e-b76c-b6d93c291f07" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLossCarryforwardsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_4922f0c2-e243-4af4-8d33-c8ba265ffbff" xlink:to="loc_us-gaap_OperatingLossCarryforwardsTable_2a51d2ab-4390-4c0e-b76c-b6d93c291f07" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxCreditCarryforwardAxis_a97f6b8d-c756-4474-bcf8-68417fc319f0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TaxCreditCarryforwardAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OperatingLossCarryforwardsTable_2a51d2ab-4390-4c0e-b76c-b6d93c291f07" xlink:to="loc_us-gaap_TaxCreditCarryforwardAxis_a97f6b8d-c756-4474-bcf8-68417fc319f0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxCreditCarryforwardNameDomain_a97f6b8d-c756-4474-bcf8-68417fc319f0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TaxCreditCarryforwardNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_TaxCreditCarryforwardAxis_a97f6b8d-c756-4474-bcf8-68417fc319f0" xlink:to="loc_us-gaap_TaxCreditCarryforwardNameDomain_a97f6b8d-c756-4474-bcf8-68417fc319f0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxCreditCarryforwardNameDomain_0f2021ea-b8b2-4d46-885b-3fc74c892745" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TaxCreditCarryforwardNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_TaxCreditCarryforwardAxis_a97f6b8d-c756-4474-bcf8-68417fc319f0" xlink:to="loc_us-gaap_TaxCreditCarryforwardNameDomain_0f2021ea-b8b2-4d46-885b-3fc74c892745" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalLossCarryforwardMember_20b43064-41db-4981-88d6-2fa986b985b9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CapitalLossCarryforwardMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TaxCreditCarryforwardNameDomain_0f2021ea-b8b2-4d46-885b-3fc74c892745" xlink:to="loc_us-gaap_CapitalLossCarryforwardMember_20b43064-41db-4981-88d6-2fa986b985b9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityAxis_234f2ada-4f71-498a-a605-dbf5abc2ca3c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeTaxAuthorityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OperatingLossCarryforwardsTable_2a51d2ab-4390-4c0e-b76c-b6d93c291f07" xlink:to="loc_us-gaap_IncomeTaxAuthorityAxis_234f2ada-4f71-498a-a605-dbf5abc2ca3c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_234f2ada-4f71-498a-a605-dbf5abc2ca3c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeTaxAuthorityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_234f2ada-4f71-498a-a605-dbf5abc2ca3c" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_234f2ada-4f71-498a-a605-dbf5abc2ca3c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_2e96d7e8-373d-4ff9-98f3-000a87a21d2e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeTaxAuthorityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_234f2ada-4f71-498a-a605-dbf5abc2ca3c" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_2e96d7e8-373d-4ff9-98f3-000a87a21d2e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DomesticCountryMember_79c82cd2-b89c-4ccc-9583-3d01ac984178" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DomesticCountryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_2e96d7e8-373d-4ff9-98f3-000a87a21d2e" xlink:to="loc_us-gaap_DomesticCountryMember_79c82cd2-b89c-4ccc-9583-3d01ac984178" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StateAndLocalJurisdictionMember_be537758-fc62-41a2-91f0-a5ebcefd9e10" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StateAndLocalJurisdictionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_2e96d7e8-373d-4ff9-98f3-000a87a21d2e" xlink:to="loc_us-gaap_StateAndLocalJurisdictionMember_be537758-fc62-41a2-91f0-a5ebcefd9e10" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCountryMember_3ed0922e-faf9-4288-8e76-365f8517af29" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ForeignCountryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_2e96d7e8-373d-4ff9-98f3-000a87a21d2e" xlink:to="loc_us-gaap_ForeignCountryMember_3ed0922e-faf9-4288-8e76-365f8517af29" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jabil.com/role/BusinessAcquisitionsFiscalYear2019and2020Details" xlink:type="simple" xlink:href="jbl-20210831.xsd#BusinessAcquisitionsFiscalYear2019and2020Details"/>
  <link:definitionLink xlink:role="http://www.jabil.com/role/BusinessAcquisitionsFiscalYear2019and2020Details" xlink:type="extended" id="i2f54d2c54802425db4033e5470514a9f_BusinessAcquisitionsFiscalYear2019and2020Details">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_9476547a-7afd-456e-86e0-f05224cc7b60" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesGross_28ca6de9-01be-4d91-848b-1764e3cd2f0c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9476547a-7afd-456e-86e0-f05224cc7b60" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesGross_28ca6de9-01be-4d91-848b-1764e3cd2f0c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_68d39ee2-13a3-4c19-8fce-d1a498ff3af2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9476547a-7afd-456e-86e0-f05224cc7b60" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_68d39ee2-13a3-4c19-8fce-d1a498ff3af2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_2f8df250-e071-43ea-8700-6ba09e421dac" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9476547a-7afd-456e-86e0-f05224cc7b60" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_2f8df250-e071-43ea-8700-6ba09e421dac" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedContractWithCustomerAsset_80d23a30-d4d4-4e88-a715-c5a5ed7b0d7e" xlink:href="jbl-20210831.xsd#jbl_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedContractWithCustomerAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9476547a-7afd-456e-86e0-f05224cc7b60" xlink:to="loc_jbl_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedContractWithCustomerAsset_80d23a30-d4d4-4e88-a715-c5a5ed7b0d7e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_5d372a0e-c905-484b-a34c-7ddd7ab67b96" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9476547a-7afd-456e-86e0-f05224cc7b60" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_5d372a0e-c905-484b-a34c-7ddd7ab67b96" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_7a53350a-a13a-4ebc-a5b3-5f33a8c36a5e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9476547a-7afd-456e-86e0-f05224cc7b60" xlink:to="loc_us-gaap_Goodwill_7a53350a-a13a-4ebc-a5b3-5f33a8c36a5e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBenefitObligation_4f37526f-9b89-4cc6-adc6-5213d0389b1e" xlink:href="jbl-20210831.xsd#jbl_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBenefitObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9476547a-7afd-456e-86e0-f05224cc7b60" xlink:to="loc_jbl_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBenefitObligation_4f37526f-9b89-4cc6-adc6-5213d0389b1e" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_e8cb76e9-5b43-4604-9f5e-a8f8d5b76252" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9476547a-7afd-456e-86e0-f05224cc7b60" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_e8cb76e9-5b43-4604-9f5e-a8f8d5b76252" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_cb408b02-845e-4456-a60e-5fd491e3b9f9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_e8cb76e9-5b43-4604-9f5e-a8f8d5b76252" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_cb408b02-845e-4456-a60e-5fd491e3b9f9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_cb408b02-845e-4456-a60e-5fd491e3b9f9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_cb408b02-845e-4456-a60e-5fd491e3b9f9" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_cb408b02-845e-4456-a60e-5fd491e3b9f9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_e1ad758e-b6d4-4027-b72b-63f0057a4dc3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_cb408b02-845e-4456-a60e-5fd491e3b9f9" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_e1ad758e-b6d4-4027-b72b-63f0057a4dc3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_JohnsonAndJohnsonMedicalDevicesCompaniesMember_b3c107a2-56de-40c2-acf6-79d0ec628569" xlink:href="jbl-20210831.xsd#jbl_JohnsonAndJohnsonMedicalDevicesCompaniesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_e1ad758e-b6d4-4027-b72b-63f0057a4dc3" xlink:to="loc_jbl_JohnsonAndJohnsonMedicalDevicesCompaniesMember_b3c107a2-56de-40c2-acf6-79d0ec628569" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jabil.com/role/FairValueMeasurementsScheduleofFairValueofFinancialAssetsandLiabilitiesMeasuredatFairValueDetails" xlink:type="simple" xlink:href="jbl-20210831.xsd#FairValueMeasurementsScheduleofFairValueofFinancialAssetsandLiabilitiesMeasuredatFairValueDetails"/>
  <link:definitionLink xlink:role="http://www.jabil.com/role/FairValueMeasurementsScheduleofFairValueofFinancialAssetsandLiabilitiesMeasuredatFairValueDetails" xlink:type="extended" id="i1a991b68c7d442b384fa934e9f388c15_FairValueMeasurementsScheduleofFairValueofFinancialAssetsandLiabilitiesMeasuredatFairValueDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_03ab4459-a77d-42d9-8c7c-f2418ed2e350" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosureAbstract_39b39ea1-4e5d-47a5-b6fa-4e1fcd3aa472" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetsFairValueDisclosureAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_03ab4459-a77d-42d9-8c7c-f2418ed2e350" xlink:to="loc_us-gaap_AssetsFairValueDisclosureAbstract_39b39ea1-4e5d-47a5-b6fa-4e1fcd3aa472" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_6d8d90e7-7b98-42a1-b831-caa8ecfd005d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_39b39ea1-4e5d-47a5-b6fa-4e1fcd3aa472" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_6d8d90e7-7b98-42a1-b831-caa8ecfd005d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentsFairValueDisclosure_59722632-cf02-4a6b-83d5-57ad6ae945bf" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InvestmentsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_39b39ea1-4e5d-47a5-b6fa-4e1fcd3aa472" xlink:to="loc_us-gaap_InvestmentsFairValueDisclosure_59722632-cf02-4a6b-83d5-57ad6ae945bf" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssets_35140204-3a8d-4ada-bdbb-5d4fdce93fe8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_39b39ea1-4e5d-47a5-b6fa-4e1fcd3aa472" xlink:to="loc_us-gaap_DerivativeAssets_35140204-3a8d-4ada-bdbb-5d4fdce93fe8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_d7f6b7de-3eba-4063-b179-0a0be1e31808" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LiabilitiesFairValueDisclosureAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_03ab4459-a77d-42d9-8c7c-f2418ed2e350" xlink:to="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_d7f6b7de-3eba-4063-b179-0a0be1e31808" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilities_91b51467-ce50-486f-b576-6361fab00b2a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_d7f6b7de-3eba-4063-b179-0a0be1e31808" xlink:to="loc_us-gaap_DerivativeLiabilities_91b51467-ce50-486f-b576-6361fab00b2a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HybridInstrumentsAtFairValueNet_298891e5-1476-44cf-8748-bb41829f56f8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_HybridInstrumentsAtFairValueNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_d7f6b7de-3eba-4063-b179-0a0be1e31808" xlink:to="loc_us-gaap_HybridInstrumentsAtFairValueNet_298891e5-1476-44cf-8748-bb41829f56f8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByBalanceSheetGroupingTable_39049ee1-efb4-4643-ad5e-9f281352a533" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueByBalanceSheetGroupingTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_03ab4459-a77d-42d9-8c7c-f2418ed2e350" xlink:to="loc_us-gaap_FairValueByBalanceSheetGroupingTable_39049ee1-efb4-4643-ad5e-9f281352a533" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_9b4e6bd2-f53a-41c9-a52b-e9630365e6a1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueByMeasurementFrequencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_39049ee1-efb4-4643-ad5e-9f281352a533" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_9b4e6bd2-f53a-41c9-a52b-e9630365e6a1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_9b4e6bd2-f53a-41c9-a52b-e9630365e6a1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_9b4e6bd2-f53a-41c9-a52b-e9630365e6a1" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_9b4e6bd2-f53a-41c9-a52b-e9630365e6a1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_0347b4c6-bde5-4408-af76-de0c25c81e21" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_9b4e6bd2-f53a-41c9-a52b-e9630365e6a1" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_0347b4c6-bde5-4408-af76-de0c25c81e21" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_362f8ae4-e4a0-49b3-aa4b-3001396a2f48" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueMeasurementsRecurringMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_0347b4c6-bde5-4408-af76-de0c25c81e21" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_362f8ae4-e4a0-49b3-aa4b-3001396a2f48" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_6f73d26a-34c4-4a5f-b1f5-dc5c05e5be4b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_39049ee1-efb4-4643-ad5e-9f281352a533" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_6f73d26a-34c4-4a5f-b1f5-dc5c05e5be4b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_6f73d26a-34c4-4a5f-b1f5-dc5c05e5be4b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_6f73d26a-34c4-4a5f-b1f5-dc5c05e5be4b" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_6f73d26a-34c4-4a5f-b1f5-dc5c05e5be4b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_51aa0cbc-6f8b-48dd-948e-076836eef938" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_6f73d26a-34c4-4a5f-b1f5-dc5c05e5be4b" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_51aa0cbc-6f8b-48dd-948e-076836eef938" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_1e49a4f0-cb9f-47db-b3f4-0a06c8d380f9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_51aa0cbc-6f8b-48dd-948e-076836eef938" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_1e49a4f0-cb9f-47db-b3f4-0a06c8d380f9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_433aae29-045a-42c1-a648-4a96b6ed85fc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_51aa0cbc-6f8b-48dd-948e-076836eef938" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_433aae29-045a-42c1-a648-4a96b6ed85fc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_b0324cde-6d38-4349-b7a4-e97e223d970c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BalanceSheetLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_39049ee1-efb4-4643-ad5e-9f281352a533" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_b0324cde-6d38-4349-b7a4-e97e223d970c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_b0324cde-6d38-4349-b7a4-e97e223d970c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_b0324cde-6d38-4349-b7a4-e97e223d970c" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_b0324cde-6d38-4349-b7a4-e97e223d970c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_8bc0b80b-dcde-4dd8-922d-be3a11bf84ee" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_b0324cde-6d38-4349-b7a4-e97e223d970c" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_8bc0b80b-dcde-4dd8-922d-be3a11bf84ee" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashEquivalentsMember_1371e3fa-53e8-4163-b0fc-463d1046639c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_8bc0b80b-dcde-4dd8-922d-be3a11bf84ee" xlink:to="loc_us-gaap_CashEquivalentsMember_1371e3fa-53e8-4163-b0fc-463d1046639c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember_1c4d4224-6859-4c35-b894-bf685d6ce11d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_8bc0b80b-dcde-4dd8-922d-be3a11bf84ee" xlink:to="loc_us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember_1c4d4224-6859-4c35-b894-bf685d6ce11d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesMember_b01809ed-2b74-4ebc-aa90-00dd24c1dea2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccruedLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_8bc0b80b-dcde-4dd8-922d-be3a11bf84ee" xlink:to="loc_us-gaap_AccruedLiabilitiesMember_b01809ed-2b74-4ebc-aa90-00dd24c1dea2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesMember_cb13e263-dadb-47a5-98ca-4bd13017b2b9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_8bc0b80b-dcde-4dd8-922d-be3a11bf84ee" xlink:to="loc_us-gaap_OtherLiabilitiesMember_cb13e263-dadb-47a5-98ca-4bd13017b2b9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsMember_53944213-7e2a-4893-9306-708910e45b80" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_8bc0b80b-dcde-4dd8-922d-be3a11bf84ee" xlink:to="loc_us-gaap_OtherAssetsMember_53944213-7e2a-4893-9306-708910e45b80" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_5b73eb81-cb86-4a06-9ea3-d9942efac3bd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_39049ee1-efb4-4643-ad5e-9f281352a533" xlink:to="loc_us-gaap_HedgingDesignationAxis_5b73eb81-cb86-4a06-9ea3-d9942efac3bd" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_5b73eb81-cb86-4a06-9ea3-d9942efac3bd_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_5b73eb81-cb86-4a06-9ea3-d9942efac3bd" xlink:to="loc_us-gaap_HedgingDesignationDomain_5b73eb81-cb86-4a06-9ea3-d9942efac3bd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_fc365912-7a9c-445c-8cb5-59ff92cfd713" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_5b73eb81-cb86-4a06-9ea3-d9942efac3bd" xlink:to="loc_us-gaap_HedgingDesignationDomain_fc365912-7a9c-445c-8cb5-59ff92cfd713" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember_6ae775aa-90be-4af3-94be-8dbf98062be1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DesignatedAsHedgingInstrumentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_fc365912-7a9c-445c-8cb5-59ff92cfd713" xlink:to="loc_us-gaap_DesignatedAsHedgingInstrumentMember_6ae775aa-90be-4af3-94be-8dbf98062be1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NondesignatedMember_08d2fe1d-4113-4a5d-9bf6-a8081129c154" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NondesignatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_fc365912-7a9c-445c-8cb5-59ff92cfd713" xlink:to="loc_us-gaap_NondesignatedMember_08d2fe1d-4113-4a5d-9bf6-a8081129c154" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_0edf5683-201f-49de-8c3b-83655657b2b8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_39049ee1-efb4-4643-ad5e-9f281352a533" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_0edf5683-201f-49de-8c3b-83655657b2b8" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_0edf5683-201f-49de-8c3b-83655657b2b8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_0edf5683-201f-49de-8c3b-83655657b2b8" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_0edf5683-201f-49de-8c3b-83655657b2b8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_258de875-ec3f-4971-bd86-611bb39e76b3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_0edf5683-201f-49de-8c3b-83655657b2b8" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_258de875-ec3f-4971-bd86-611bb39e76b3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeContractMember_c1f43a16-ec86-4bb8-9064-0f5ae3b2d18f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ForeignExchangeContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_258de875-ec3f-4971-bd86-611bb39e76b3" xlink:to="loc_us-gaap_ForeignExchangeContractMember_c1f43a16-ec86-4bb8-9064-0f5ae3b2d18f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateSwapMember_7aea9f31-ff75-415b-85c9-a7ab83c7021d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InterestRateSwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_258de875-ec3f-4971-bd86-611bb39e76b3" xlink:to="loc_us-gaap_InterestRateSwapMember_7aea9f31-ff75-415b-85c9-a7ab83c7021d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_ExtendedInterestRateSwapMember_9eb36285-803a-4a2e-b74b-2b6e2146b211" xlink:href="jbl-20210831.xsd#jbl_ExtendedInterestRateSwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_258de875-ec3f-4971-bd86-611bb39e76b3" xlink:to="loc_jbl_ExtendedInterestRateSwapMember_9eb36285-803a-4a2e-b74b-2b6e2146b211" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_f2735f4d-ec27-4943-86b1-7f59d5141a23" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_39049ee1-efb4-4643-ad5e-9f281352a533" xlink:to="loc_us-gaap_FinancialInstrumentAxis_f2735f4d-ec27-4943-86b1-7f59d5141a23" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_f2735f4d-ec27-4943-86b1-7f59d5141a23_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_f2735f4d-ec27-4943-86b1-7f59d5141a23" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_f2735f4d-ec27-4943-86b1-7f59d5141a23_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_fed6734c-3cb6-47e6-8fbd-aa447cf226cf" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_f2735f4d-ec27-4943-86b1-7f59d5141a23" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_fed6734c-3cb6-47e6-8fbd-aa447cf226cf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForwardContractsMember_0aa8f2f5-86d9-44d2-afc9-a9a754c4e9d9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ForwardContractsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_fed6734c-3cb6-47e6-8fbd-aa447cf226cf" xlink:to="loc_us-gaap_ForwardContractsMember_0aa8f2f5-86d9-44d2-afc9-a9a754c4e9d9" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jabil.com/role/FairValueMeasurementsAssetsHeldforSaleDetails" xlink:type="simple" xlink:href="jbl-20210831.xsd#FairValueMeasurementsAssetsHeldforSaleDetails"/>
  <link:definitionLink xlink:role="http://www.jabil.com/role/FairValueMeasurementsAssetsHeldforSaleDetails" xlink:type="extended" id="iccc7cc19db7f4ebf8c2f95c4600a9444_FairValueMeasurementsAssetsHeldforSaleDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_6dd4c56e-2fe4-47f6-bd5d-1c1ba880c1af" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsHeldForSaleLongLivedFairValueDisclosure_8698bc15-62c9-46c3-b4b3-1b1492be62d2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetsHeldForSaleLongLivedFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_6dd4c56e-2fe4-47f6-bd5d-1c1ba880c1af" xlink:to="loc_us-gaap_AssetsHeldForSaleLongLivedFairValueDisclosure_8698bc15-62c9-46c3-b4b3-1b1492be62d2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_AssetHeldForSaleAssetsWithFairValueExceedingCarryingValue_52fa268e-e627-485a-a694-50219dbbdc13" xlink:href="jbl-20210831.xsd#jbl_AssetHeldForSaleAssetsWithFairValueExceedingCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_6dd4c56e-2fe4-47f6-bd5d-1c1ba880c1af" xlink:to="loc_jbl_AssetHeldForSaleAssetsWithFairValueExceedingCarryingValue_52fa268e-e627-485a-a694-50219dbbdc13" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_AssetHeldForSaleAssetsWithFairValueApproximatingCarryingValue_1fd8c4fe-6c33-4f2f-820a-76a91a226010" xlink:href="jbl-20210831.xsd#jbl_AssetHeldForSaleAssetsWithFairValueApproximatingCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_6dd4c56e-2fe4-47f6-bd5d-1c1ba880c1af" xlink:to="loc_jbl_AssetHeldForSaleAssetsWithFairValueApproximatingCarryingValue_1fd8c4fe-6c33-4f2f-820a-76a91a226010" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_c5888f8c-dffb-4fab-bc71-c19c8aace4dd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_6dd4c56e-2fe4-47f6-bd5d-1c1ba880c1af" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_c5888f8c-dffb-4fab-bc71-c19c8aace4dd" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_74816ad9-de25-4efb-be61-3d7797043fc9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueByMeasurementBasisAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_c5888f8c-dffb-4fab-bc71-c19c8aace4dd" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_74816ad9-de25-4efb-be61-3d7797043fc9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_74816ad9-de25-4efb-be61-3d7797043fc9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_74816ad9-de25-4efb-be61-3d7797043fc9" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_74816ad9-de25-4efb-be61-3d7797043fc9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_f119acca-50df-4935-a9d5-ac287465d494" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueDisclosureItemAmountsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_74816ad9-de25-4efb-be61-3d7797043fc9" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_f119acca-50df-4935-a9d5-ac287465d494" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_41ff57a1-ff0a-4543-9d8a-32cd206bf6d2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_f119acca-50df-4935-a9d5-ac287465d494" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_41ff57a1-ff0a-4543-9d8a-32cd206bf6d2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_c1bfa084-a6b0-41d8-b66d-709469fc01d9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_f119acca-50df-4935-a9d5-ac287465d494" xlink:to="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_c1bfa084-a6b0-41d8-b66d-709469fc01d9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_b1911599-7482-4e90-a55b-8520ed1d7b2f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_c5888f8c-dffb-4fab-bc71-c19c8aace4dd" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_b1911599-7482-4e90-a55b-8520ed1d7b2f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_b1911599-7482-4e90-a55b-8520ed1d7b2f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_b1911599-7482-4e90-a55b-8520ed1d7b2f" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_b1911599-7482-4e90-a55b-8520ed1d7b2f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_21451cc3-aa2a-4f85-b080-66a19173a5aa" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_b1911599-7482-4e90-a55b-8520ed1d7b2f" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_21451cc3-aa2a-4f85-b080-66a19173a5aa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_43b78593-dda1-476e-a8bb-b2b43e5d57c3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_21451cc3-aa2a-4f85-b080-66a19173a5aa" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_43b78593-dda1-476e-a8bb-b2b43e5d57c3" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jabil.com/role/FairValueMeasurementsScheduleofCarryingAmountsandFairValuesofNotesPayableandLongtermDebtDetails" xlink:type="simple" xlink:href="jbl-20210831.xsd#FairValueMeasurementsScheduleofCarryingAmountsandFairValuesofNotesPayableandLongtermDebtDetails"/>
  <link:definitionLink xlink:role="http://www.jabil.com/role/FairValueMeasurementsScheduleofCarryingAmountsandFairValuesofNotesPayableandLongtermDebtDetails" xlink:type="extended" id="i3e37ddeeb33e44f9986e7910926cf307_FairValueMeasurementsScheduleofCarryingAmountsandFairValuesofNotesPayableandLongtermDebtDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_956b339e-0084-4006-91c3-e318c262f9e3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_fae88394-580e-4a9b-80b4-2e500652b76a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_956b339e-0084-4006-91c3-e318c262f9e3" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_fae88394-580e-4a9b-80b4-2e500652b76a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_a271f0bd-c475-4bf6-9d6b-a18efb2864a5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_956b339e-0084-4006-91c3-e318c262f9e3" xlink:to="loc_us-gaap_LongTermDebt_a271f0bd-c475-4bf6-9d6b-a18efb2864a5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtFairValue_3cbde756-67db-47d9-93e0-0adf3a98c3d4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongTermDebtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_956b339e-0084-4006-91c3-e318c262f9e3" xlink:to="loc_us-gaap_LongTermDebtFairValue_3cbde756-67db-47d9-93e0-0adf3a98c3d4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByBalanceSheetGroupingTable_1f2916b3-53f1-4939-9332-26ae54c2efd8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueByBalanceSheetGroupingTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_956b339e-0084-4006-91c3-e318c262f9e3" xlink:to="loc_us-gaap_FairValueByBalanceSheetGroupingTable_1f2916b3-53f1-4939-9332-26ae54c2efd8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_0fdfb63e-4189-4726-9844-2b0f5f993bf4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_1f2916b3-53f1-4939-9332-26ae54c2efd8" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_0fdfb63e-4189-4726-9844-2b0f5f993bf4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_0fdfb63e-4189-4726-9844-2b0f5f993bf4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_0fdfb63e-4189-4726-9844-2b0f5f993bf4" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_0fdfb63e-4189-4726-9844-2b0f5f993bf4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_765c3f3e-d7f8-4839-965a-71aec7cdd80c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_0fdfb63e-4189-4726-9844-2b0f5f993bf4" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_765c3f3e-d7f8-4839-965a-71aec7cdd80c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_5428c6fb-7cf4-407c-9123-052bdb913a73" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_765c3f3e-d7f8-4839-965a-71aec7cdd80c" xlink:to="loc_us-gaap_SeniorNotesMember_5428c6fb-7cf4-407c-9123-052bdb913a73" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_c9ba0389-1ee4-4a74-89ab-8be5011ffef6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_1f2916b3-53f1-4939-9332-26ae54c2efd8" xlink:to="loc_us-gaap_DebtInstrumentAxis_c9ba0389-1ee4-4a74-89ab-8be5011ffef6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_c9ba0389-1ee4-4a74-89ab-8be5011ffef6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_c9ba0389-1ee4-4a74-89ab-8be5011ffef6" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_c9ba0389-1ee4-4a74-89ab-8be5011ffef6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_8102fce9-09de-4d57-8972-fb26dffffbef" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_c9ba0389-1ee4-4a74-89ab-8be5011ffef6" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_8102fce9-09de-4d57-8972-fb26dffffbef" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_SeniorNotesDueSeptember2022Member_0031f648-70df-4c3b-a246-a6097ec06ae1" xlink:href="jbl-20210831.xsd#jbl_SeniorNotesDueSeptember2022Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_8102fce9-09de-4d57-8972-fb26dffffbef" xlink:to="loc_jbl_SeniorNotesDueSeptember2022Member_0031f648-70df-4c3b-a246-a6097ec06ae1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_SeniorNotesDueJuly2023Member_31c54177-1af4-4105-bf41-1020483e912b" xlink:href="jbl-20210831.xsd#jbl_SeniorNotesDueJuly2023Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_8102fce9-09de-4d57-8972-fb26dffffbef" xlink:to="loc_jbl_SeniorNotesDueJuly2023Member_31c54177-1af4-4105-bf41-1020483e912b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_SeniorNotesDueJanuary2028Member_634a675c-f0ee-47f1-91f9-6bfddbd92d0d" xlink:href="jbl-20210831.xsd#jbl_SeniorNotesDueJanuary2028Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_8102fce9-09de-4d57-8972-fb26dffffbef" xlink:to="loc_jbl_SeniorNotesDueJanuary2028Member_634a675c-f0ee-47f1-91f9-6bfddbd92d0d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_SeniorNotesDueJanuary2030Member_583ed9a1-13af-40b3-b6a2-aa4614c972c6" xlink:href="jbl-20210831.xsd#jbl_SeniorNotesDueJanuary2030Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_8102fce9-09de-4d57-8972-fb26dffffbef" xlink:to="loc_jbl_SeniorNotesDueJanuary2030Member_583ed9a1-13af-40b3-b6a2-aa4614c972c6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_SeniorNotesDueJanuary2031Member_5a3a6ae2-0474-4c0f-913b-b21f042874f6" xlink:href="jbl-20210831.xsd#jbl_SeniorNotesDueJanuary2031Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_8102fce9-09de-4d57-8972-fb26dffffbef" xlink:to="loc_jbl_SeniorNotesDueJanuary2031Member_5a3a6ae2-0474-4c0f-913b-b21f042874f6" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_SeniorNotesDueApril2026Member_8d9faac2-8533-4d83-aff0-a1fc8ba5e470" xlink:href="jbl-20210831.xsd#jbl_SeniorNotesDueApril2026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_8102fce9-09de-4d57-8972-fb26dffffbef" xlink:to="loc_jbl_SeniorNotesDueApril2026Member_8d9faac2-8533-4d83-aff0-a1fc8ba5e470" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_8ab3c60d-49bd-4dfe-b206-8366b6b7b5a0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_1f2916b3-53f1-4939-9332-26ae54c2efd8" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_8ab3c60d-49bd-4dfe-b206-8366b6b7b5a0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_8ab3c60d-49bd-4dfe-b206-8366b6b7b5a0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_8ab3c60d-49bd-4dfe-b206-8366b6b7b5a0" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_8ab3c60d-49bd-4dfe-b206-8366b6b7b5a0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_54b262aa-ef5d-461e-a129-585e2f984ae9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_8ab3c60d-49bd-4dfe-b206-8366b6b7b5a0" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_54b262aa-ef5d-461e-a129-585e2f984ae9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_7c612ad9-8e9f-4f6d-8513-5e02c561af25" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_54b262aa-ef5d-461e-a129-585e2f984ae9" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_7c612ad9-8e9f-4f6d-8513-5e02c561af25" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_43089156-5055-4e5e-80c0-77c36ce99e85" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_54b262aa-ef5d-461e-a129-585e2f984ae9" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_43089156-5055-4e5e-80c0-77c36ce99e85" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_b1e374c8-7ff1-435b-8b98-fee9b043db76" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueByMeasurementBasisAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_1f2916b3-53f1-4939-9332-26ae54c2efd8" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_b1e374c8-7ff1-435b-8b98-fee9b043db76" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_b1e374c8-7ff1-435b-8b98-fee9b043db76_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_b1e374c8-7ff1-435b-8b98-fee9b043db76" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_b1e374c8-7ff1-435b-8b98-fee9b043db76_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_5e210446-2872-4362-bb08-8bc3105c314a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueDisclosureItemAmountsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_b1e374c8-7ff1-435b-8b98-fee9b043db76" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_5e210446-2872-4362-bb08-8bc3105c314a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_41ff5382-17bc-4bb8-8e9f-c6dbe75d5f44" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_5e210446-2872-4362-bb08-8bc3105c314a" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_41ff5382-17bc-4bb8-8e9f-c6dbe75d5f44" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_f44a2d27-92ed-4105-8a77-23a02329f2fc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_5e210446-2872-4362-bb08-8bc3105c314a" xlink:to="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_f44a2d27-92ed-4105-8a77-23a02329f2fc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_11311fc4-ac33-41fa-88f6-e5a96f7b039d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_5e210446-2872-4362-bb08-8bc3105c314a" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_11311fc4-ac33-41fa-88f6-e5a96f7b039d" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jabil.com/role/ScheduleofValuationandQualifyingAccountsDetails" xlink:type="simple" xlink:href="jbl-20210831.xsd#ScheduleofValuationandQualifyingAccountsDetails"/>
  <link:definitionLink xlink:role="http://www.jabil.com/role/ScheduleofValuationandQualifyingAccountsDetails" xlink:type="extended" id="i539cf195465f4c77bd67416cecbbbb22_ScheduleofValuationandQualifyingAccountsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_srt_ValuationAndQualifyingAccountsDisclosureLineItems_f4e0b545-60e1-4f69-adcc-728a6e7f35f5" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ValuationAndQualifyingAccountsDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_5cf08f66-f0ba-4250-be9c-0a9be1e6b006" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_MovementInValuationAllowancesAndReservesRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ValuationAndQualifyingAccountsDisclosureLineItems_f4e0b545-60e1-4f69-adcc-728a6e7f35f5" xlink:to="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_5cf08f66-f0ba-4250-be9c-0a9be1e6b006" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesBalance_a2191244-8fe1-41b1-8c4e-a01ead5cd33e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ValuationAllowancesAndReservesBalance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_5cf08f66-f0ba-4250-be9c-0a9be1e6b006" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesBalance_a2191244-8fe1-41b1-8c4e-a01ead5cd33e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense_c66b4b7d-0a27-4755-a1b2-03df9c7db4b3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_5cf08f66-f0ba-4250-be9c-0a9be1e6b006" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense_c66b4b7d-0a27-4755-a1b2-03df9c7db4b3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_jbl_ValuationAllowanceAndReservesAdditionsReductionsChargedToOtherAccounts_83569cf9-14d2-4e28-8fb7-543cfbe33266" xlink:href="jbl-20210831.xsd#jbl_ValuationAllowanceAndReservesAdditionsReductionsChargedToOtherAccounts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_5cf08f66-f0ba-4250-be9c-0a9be1e6b006" xlink:to="loc_jbl_ValuationAllowanceAndReservesAdditionsReductionsChargedToOtherAccounts_83569cf9-14d2-4e28-8fb7-543cfbe33266" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDeductions_0d0e74c6-7621-4f30-a1fe-1b89d4aefb04" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ValuationAllowancesAndReservesDeductions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_5cf08f66-f0ba-4250-be9c-0a9be1e6b006" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDeductions_0d0e74c6-7621-4f30-a1fe-1b89d4aefb04" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesBalance_9f409fdd-9de3-42d6-ab66-4b18600e5c29" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ValuationAllowancesAndReservesBalance"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ValuationAndQualifyingAccountsDisclosureTable_76895e4c-373f-46ab-b824-a4c1b33d0120" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ValuationAndQualifyingAccountsDisclosureTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_srt_ValuationAndQualifyingAccountsDisclosureLineItems_f4e0b545-60e1-4f69-adcc-728a6e7f35f5" xlink:to="loc_srt_ValuationAndQualifyingAccountsDisclosureTable_76895e4c-373f-46ab-b824-a4c1b33d0120" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_5cba8e16-2a49-489f-9b24-17d634a2a975" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ValuationAllowancesAndReservesTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_ValuationAndQualifyingAccountsDisclosureTable_76895e4c-373f-46ab-b824-a4c1b33d0120" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_5cba8e16-2a49-489f-9b24-17d634a2a975" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDomain_5cba8e16-2a49-489f-9b24-17d634a2a975_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ValuationAllowancesAndReservesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_5cba8e16-2a49-489f-9b24-17d634a2a975" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDomain_5cba8e16-2a49-489f-9b24-17d634a2a975_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDomain_3ffdacbf-f2d8-49f4-95b3-ac8ad00bd7dd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ValuationAllowancesAndReservesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_5cba8e16-2a49-489f-9b24-17d634a2a975" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDomain_3ffdacbf-f2d8-49f4-95b3-ac8ad00bd7dd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryValuationReserveMember_84ad6c45-9dd7-40e4-9253-d8bb8ca99b91" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InventoryValuationReserveMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesDomain_3ffdacbf-f2d8-49f4-95b3-ac8ad00bd7dd" xlink:to="loc_us-gaap_InventoryValuationReserveMember_84ad6c45-9dd7-40e4-9253-d8bb8ca99b91" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowanceOfDeferredTaxAssetsMember_7841d2ed-1202-4457-8614-1b602c21d55e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ValuationAllowanceOfDeferredTaxAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesDomain_3ffdacbf-f2d8-49f4-95b3-ac8ad00bd7dd" xlink:to="loc_us-gaap_ValuationAllowanceOfDeferredTaxAssetsMember_7841d2ed-1202-4457-8614-1b602c21d55e" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="simple" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-roles-2021-01-31.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/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.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="0"/>
  </link:definitionLink>
</link:linkbase>
