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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019c392d-480c-750b-b001-7eda311d0c92,g:fde22181-3ce4-4a55-943a-ef2cee5822c9-->
<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.supermicro.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical" xlink:type="simple" xlink:href="smci-20260331.xsd#CONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical"/>
  <link:definitionLink xlink:role="http://www.supermicro.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019c392d-4aa2-72d8-9787-ee3e15a4b481" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019c392d-4aa2-7e0a-800f-9efcc1dd1574" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019c392d-4aa2-72d8-9787-ee3e15a4b481" xlink:to="loc_us-gaap_StatementTable_019c392d-4aa2-7e0a-800f-9efcc1dd1574" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c392d-4aa2-702d-a9a8-fda656e8fa4b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019c392d-4aa2-7e0a-800f-9efcc1dd1574" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c392d-4aa2-702d-a9a8-fda656e8fa4b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019c392d-4aa2-702d-a9a8-fda656e8fa4b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c392d-4aa2-702d-a9a8-fda656e8fa4b" xlink:to="loc_us-gaap_RelatedPartyDomain_019c392d-4aa2-702d-a9a8-fda656e8fa4b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019c392d-4aa2-7479-9803-e8fef5c14813" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c392d-4aa2-702d-a9a8-fda656e8fa4b" xlink:to="loc_us-gaap_RelatedPartyDomain_019c392d-4aa2-7479-9803-e8fef5c14813" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_019c392d-4aa2-75f5-816d-59bf9a8feed7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019c392d-4aa2-7479-9803-e8fef5c14813" xlink:to="loc_us-gaap_RelatedPartyMember_019c392d-4aa2-75f5-816d-59bf9a8feed7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrentAbstract_019c392d-4aa2-70c3-9f57-af300a42755b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsCurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019c392d-4aa2-72d8-9787-ee3e15a4b481" xlink:to="loc_us-gaap_AssetsCurrentAbstract_019c392d-4aa2-70c3-9f57-af300a42755b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_019c392d-4aa2-73c6-bc8f-b9c2c698b307" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_019c392d-4aa2-70c3-9f57-af300a42755b" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_019c392d-4aa2-73c6-bc8f-b9c2c698b307" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_019c392d-4aa2-7296-bf25-8224a802ccf6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsReceivableNetCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_019c392d-4aa2-70c3-9f57-af300a42755b" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_019c392d-4aa2-7296-bf25-8224a802ccf6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_019c392d-4aa2-7cc7-b636-18b8c0ad1a14" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_019c392d-4aa2-70c3-9f57-af300a42755b" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_019c392d-4aa2-7cc7-b636-18b8c0ad1a14" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract_019c392d-4aa2-7e35-87e9-64764ee53b66" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesCurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019c392d-4aa2-72d8-9787-ee3e15a4b481" xlink:to="loc_us-gaap_LiabilitiesCurrentAbstract_019c392d-4aa2-7e35-87e9-64764ee53b66" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrent_019c392d-4aa2-7dda-995b-4ba65495f5b1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsPayableCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019c392d-4aa2-7e35-87e9-64764ee53b66" xlink:to="loc_us-gaap_AccountsPayableCurrent_019c392d-4aa2-7dda-995b-4ba65495f5b1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_019c392d-4aa2-7ce8-9420-bb53e847a7d2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccruedLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019c392d-4aa2-7e35-87e9-64764ee53b66" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrent_019c392d-4aa2-7ce8-9420-bb53e847a7d2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_019c392d-4aa2-70fc-be25-67303e24daee" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherLiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019c392d-4aa2-7e35-87e9-64764ee53b66" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_019c392d-4aa2-70fc-be25-67303e24daee" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityAbstract_019c392d-4aa2-78d1-ad77-4ae3a6a02de0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019c392d-4aa2-72d8-9787-ee3e15a4b481" xlink:to="loc_us-gaap_StockholdersEquityAbstract_019c392d-4aa2-78d1-ad77-4ae3a6a02de0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_019c392d-4aa2-7bd1-b914-ddb80ce110b7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockParOrStatedValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_019c392d-4aa2-78d1-ad77-4ae3a6a02de0" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_019c392d-4aa2-7bd1-b914-ddb80ce110b7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesAuthorized_019c392d-4aa2-7af6-8701-23417f2985e8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_019c392d-4aa2-78d1-ad77-4ae3a6a02de0" xlink:to="loc_us-gaap_CommonStockSharesAuthorized_019c392d-4aa2-7af6-8701-23417f2985e8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesIssued_019c392d-4aa2-70bb-8887-b8d16b8a6221" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_019c392d-4aa2-78d1-ad77-4ae3a6a02de0" xlink:to="loc_us-gaap_CommonStockSharesIssued_019c392d-4aa2-70bb-8887-b8d16b8a6221" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_019c392d-4aa2-71ac-b4bc-95cb03701155" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_019c392d-4aa2-78d1-ad77-4ae3a6a02de0" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_019c392d-4aa2-71ac-b4bc-95cb03701155" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.supermicro.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONSParenthetical" xlink:type="simple" xlink:href="smci-20260331.xsd#CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONSParenthetical"/>
  <link:definitionLink xlink:role="http://www.supermicro.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONSParenthetical" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019c392d-4aa2-7d42-a1f9-17d848c805f1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019c392d-4aa2-7c4c-a8f9-c636c6d1c13a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019c392d-4aa2-7d42-a1f9-17d848c805f1" xlink:to="loc_us-gaap_StatementTable_019c392d-4aa2-7c4c-a8f9-c636c6d1c13a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c392d-4aa2-7dcd-b23b-b1be025717a7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019c392d-4aa2-7c4c-a8f9-c636c6d1c13a" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c392d-4aa2-7dcd-b23b-b1be025717a7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019c392d-4aa2-7dcd-b23b-b1be025717a7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c392d-4aa2-7dcd-b23b-b1be025717a7" xlink:to="loc_us-gaap_RelatedPartyDomain_019c392d-4aa2-7dcd-b23b-b1be025717a7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019c392d-4aa2-740a-af35-a906ff35d513" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c392d-4aa2-7dcd-b23b-b1be025717a7" xlink:to="loc_us-gaap_RelatedPartyDomain_019c392d-4aa2-740a-af35-a906ff35d513" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_019c392d-4aa2-7e0e-9e85-5de28ffb108d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019c392d-4aa2-740a-af35-a906ff35d513" xlink:to="loc_us-gaap_RelatedPartyMember_019c392d-4aa2-7e0e-9e85-5de28ffb108d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019c392d-4aa2-779f-9010-0be2f370335d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019c392d-4aa2-7d42-a1f9-17d848c805f1" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019c392d-4aa2-779f-9010-0be2f370335d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfRevenue_019c392d-4aa2-7a8a-bdbb-034f0ad94cb2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostOfRevenue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019c392d-4aa2-7d42-a1f9-17d848c805f1" xlink:to="loc_us-gaap_CostOfRevenue_019c392d-4aa2-7a8a-bdbb-034f0ad94cb2" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.supermicro.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY" xlink:type="simple" xlink:href="smci-20260331.xsd#CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY"/>
  <link:definitionLink xlink:role="http://www.supermicro.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019c392d-4aa2-7dc5-9ec1-70c4adc59c25" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019c392d-4aa2-7475-ac24-995147e8f1e2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019c392d-4aa2-7dc5-9ec1-70c4adc59c25" xlink:to="loc_us-gaap_StatementTable_019c392d-4aa2-7475-ac24-995147e8f1e2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_019c392d-4aa2-741e-a918-9297f13eaa64" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019c392d-4aa2-7475-ac24-995147e8f1e2" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_019c392d-4aa2-741e-a918-9297f13eaa64" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019c392d-4aa2-741e-a918-9297f13eaa64_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019c392d-4aa2-741e-a918-9297f13eaa64" xlink:to="loc_us-gaap_EquityComponentDomain_019c392d-4aa2-741e-a918-9297f13eaa64_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019c392d-4aa2-729a-a9f7-f2db9f6b20a1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019c392d-4aa2-741e-a918-9297f13eaa64" xlink:to="loc_us-gaap_EquityComponentDomain_019c392d-4aa2-729a-a9f7-f2db9f6b20a1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockIncludingAdditionalPaidInCapitalMember_019c392d-4aa2-7f93-b889-92752c5723dd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockIncludingAdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019c392d-4aa2-729a-a9f7-f2db9f6b20a1" xlink:to="loc_us-gaap_CommonStockIncludingAdditionalPaidInCapitalMember_019c392d-4aa2-7f93-b889-92752c5723dd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AociIncludingPortionAttributableToNoncontrollingInterestMember_019c392d-4aa2-7561-a61c-a45a60d5beda" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AociIncludingPortionAttributableToNoncontrollingInterestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019c392d-4aa2-729a-a9f7-f2db9f6b20a1" xlink:to="loc_us-gaap_AociIncludingPortionAttributableToNoncontrollingInterestMember_019c392d-4aa2-7561-a61c-a45a60d5beda" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_019c392d-4aa2-700c-ac5e-fa2335d47437" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019c392d-4aa2-729a-a9f7-f2db9f6b20a1" xlink:to="loc_us-gaap_RetainedEarningsMember_019c392d-4aa2-700c-ac5e-fa2335d47437" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncontrollingInterestMember_019c392d-4aa2-7656-804c-7e0da7ed38ed" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NoncontrollingInterestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019c392d-4aa2-729a-a9f7-f2db9f6b20a1" xlink:to="loc_us-gaap_NoncontrollingInterestMember_019c392d-4aa2-7656-804c-7e0da7ed38ed" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c392d-4aa2-7536-af33-812f9c67b115" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019c392d-4aa2-7dc5-9ec1-70c4adc59c25" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c392d-4aa2-7536-af33-812f9c67b115" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_019c392d-4aa2-7102-8fc2-eee7d1c353a7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c392d-4aa2-7536-af33-812f9c67b115" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_019c392d-4aa2-7102-8fc2-eee7d1c353a7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019c392d-4aa2-71b9-8dad-556421e0aaaa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c392d-4aa2-7536-af33-812f9c67b115" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019c392d-4aa2-71b9-8dad-556421e0aaaa" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_019c392d-4aa2-77dc-89ea-6e190a9d93cd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c392d-4aa2-7536-af33-812f9c67b115" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_019c392d-4aa2-77dc-89ea-6e190a9d93cd" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_019c392d-4aa2-784c-8c8e-c3d54f894f02" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c392d-4aa2-7536-af33-812f9c67b115" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_019c392d-4aa2-784c-8c8e-c3d54f894f02" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross_019c392d-4aa2-7012-8ee1-a19134df8288" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c392d-4aa2-7536-af33-812f9c67b115" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross_019c392d-4aa2-7012-8ee1-a19134df8288" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_019c392d-4aa2-7e91-be85-b38963871b75" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c392d-4aa2-7536-af33-812f9c67b115" xlink:to="loc_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_019c392d-4aa2-7e91-be85-b38963871b75" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_AdjustmentsToAdditionalPaidInCapitalSharesWithheldForTaxWithholdingObligationValue_019c392d-4aa2-716d-978a-682677100523" xlink:href="smci-20260331.xsd#smci_AdjustmentsToAdditionalPaidInCapitalSharesWithheldForTaxWithholdingObligationValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c392d-4aa2-7536-af33-812f9c67b115" xlink:to="loc_smci_AdjustmentsToAdditionalPaidInCapitalSharesWithheldForTaxWithholdingObligationValue_019c392d-4aa2-716d-978a-682677100523" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_019c392d-4aa2-7f43-b103-868a3677ecdf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c392d-4aa2-7536-af33-812f9c67b115" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_019c392d-4aa2-7f43-b103-868a3677ecdf" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_AdjustmentsToAdditionalPaidInCapitalPurchaseOfCappedCallsNetOfTax_019d68d2-28eb-76b6-add0-f512f2ae680f" xlink:href="smci-20260331.xsd#smci_AdjustmentsToAdditionalPaidInCapitalPurchaseOfCappedCallsNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c392d-4aa2-7536-af33-812f9c67b115" xlink:to="loc_smci_AdjustmentsToAdditionalPaidInCapitalPurchaseOfCappedCallsNetOfTax_019d68d2-28eb-76b6-add0-f512f2ae680f" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_019c392d-4aa2-7eee-9203-d0137f24034d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c392d-4aa2-7536-af33-812f9c67b115" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_019c392d-4aa2-7eee-9203-d0137f24034d" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_019c392d-4aa2-7efd-bb07-a7c86ee5adf1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c392d-4aa2-7536-af33-812f9c67b115" xlink:to="loc_us-gaap_ProfitLoss_019c392d-4aa2-7efd-bb07-a7c86ee5adf1" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_019c392d-4aa2-7969-8560-aea3e93a2583" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019c392d-4aa2-7127-ae89-a136bd6f4f4f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.supermicro.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS" xlink:type="simple" xlink:href="smci-20260331.xsd#CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"/>
  <link:definitionLink xlink:role="http://www.supermicro.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019dce18-6aca-79db-b44e-cad51620f8f9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019dce18-6aca-7951-bb8c-78f7b8426301" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019dce18-6aca-79db-b44e-cad51620f8f9" xlink:to="loc_us-gaap_StatementTable_019dce18-6aca-7951-bb8c-78f7b8426301" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019dce18-6aca-7689-a0c8-3ba7619639e9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019dce18-6aca-7951-bb8c-78f7b8426301" xlink:to="loc_us-gaap_DebtInstrumentAxis_019dce18-6aca-7689-a0c8-3ba7619639e9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019dce18-6aca-7689-a0c8-3ba7619639e9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019dce18-6aca-7689-a0c8-3ba7619639e9" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019dce18-6aca-7689-a0c8-3ba7619639e9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019dce18-6aca-748d-8cbf-313e614c1220" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019dce18-6aca-7689-a0c8-3ba7619639e9" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019dce18-6aca-748d-8cbf-313e614c1220" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_ConvertibleSeniorNotesDue2028Member_019dce18-6aca-7e04-a6ad-bae355baf437" xlink:href="smci-20260331.xsd#smci_ConvertibleSeniorNotesDue2028Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019dce18-6aca-748d-8cbf-313e614c1220" xlink:to="loc_smci_ConvertibleSeniorNotesDue2028Member_019dce18-6aca-7e04-a6ad-bae355baf437" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_019c392d-4aa2-7415-9653-9eb18d4f9927" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019dce18-6aca-79db-b44e-cad51620f8f9" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_019c392d-4aa2-7415-9653-9eb18d4f9927" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019c392d-4aa2-7bb0-82a9-6f32c09ee5b0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_019c392d-4aa2-7415-9653-9eb18d4f9927" xlink:to="loc_us-gaap_NetIncomeLoss_019c392d-4aa2-7bb0-82a9-6f32c09ee5b0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019c392d-4aa2-7cd5-9ced-f522f15616b9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_019c392d-4aa2-7415-9653-9eb18d4f9927" xlink:to="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019c392d-4aa2-7cd5-9ced-f522f15616b9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_DepreciationAmortizationAndNonCashInterest_019c392d-4aa2-7f8d-b500-f5e9d1a0cc41" xlink:href="smci-20260331.xsd#smci_DepreciationAmortizationAndNonCashInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019c392d-4aa2-7cd5-9ced-f522f15616b9" xlink:to="loc_smci_DepreciationAmortizationAndNonCashInterest_019c392d-4aa2-7f8d-b500-f5e9d1a0cc41" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense_019c392d-4aa2-7877-88eb-bdf313ca6657" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019c392d-4aa2-7cd5-9ced-f522f15616b9" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense_019c392d-4aa2-7877-88eb-bdf313ca6657" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfFinancingCostsAndDiscounts_019c392d-4aa2-7e5c-903b-24f1edd0e5ba" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AmortizationOfFinancingCostsAndDiscounts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019c392d-4aa2-7cd5-9ced-f522f15616b9" xlink:to="loc_us-gaap_AmortizationOfFinancingCostsAndDiscounts_019c392d-4aa2-7e5c-903b-24f1edd0e5ba" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryWriteDown_019c392d-4aa2-7519-90cb-85aab0cf550e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InventoryWriteDown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019c392d-4aa2-7cd5-9ced-f522f15616b9" xlink:to="loc_us-gaap_InventoryWriteDown_019c392d-4aa2-7519-90cb-85aab0cf550e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensation_019c392d-4aa2-7bec-96bc-bb701d6bea5d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019c392d-4aa2-7cd5-9ced-f522f15616b9" xlink:to="loc_us-gaap_ShareBasedCompensation_019c392d-4aa2-7bec-96bc-bb701d6bea5d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetImpairmentCharges_019c392d-4aa2-7718-9a8c-6ee6a43a962c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetImpairmentCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019c392d-4aa2-7cd5-9ced-f522f15616b9" xlink:to="loc_us-gaap_AssetImpairmentCharges_019c392d-4aa2-7718-9a8c-6ee6a43a962c" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestments_019c392d-4aa2-7c67-821a-86fe5df0ed5a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromEquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019c392d-4aa2-7cd5-9ced-f522f15616b9" xlink:to="loc_us-gaap_IncomeLossFromEquityMethodInvestments_019c392d-4aa2-7c67-821a-86fe5df0ed5a" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyTransactionGainLossUnrealized_019c392d-4aa2-7156-adb4-37c8444b5823" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignCurrencyTransactionGainLossUnrealized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019c392d-4aa2-7cd5-9ced-f522f15616b9" xlink:to="loc_us-gaap_ForeignCurrencyTransactionGainLossUnrealized_019c392d-4aa2-7156-adb4-37c8444b5823" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_019d6df6-9445-7206-b8c3-c9ea37ebaa5a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019c392d-4aa2-7cd5-9ced-f522f15616b9" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_019d6df6-9445-7206-b8c3-c9ea37ebaa5a" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxesAndTaxCredits_019c392d-4aa2-7584-a088-67428c1f881e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredIncomeTaxesAndTaxCredits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019c392d-4aa2-7cd5-9ced-f522f15616b9" xlink:to="loc_us-gaap_DeferredIncomeTaxesAndTaxCredits_019c392d-4aa2-7584-a088-67428c1f881e" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNoncashIncomeExpense_019c392d-4aa2-713b-bb26-432f45ca5f19" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherNoncashIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019c392d-4aa2-7cd5-9ced-f522f15616b9" xlink:to="loc_us-gaap_OtherNoncashIncomeExpense_019c392d-4aa2-713b-bb26-432f45ca5f19" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019c392d-4aa2-76a1-a046-dc341903831d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019c392d-4aa2-7cd5-9ced-f522f15616b9" xlink:to="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019c392d-4aa2-76a1-a046-dc341903831d" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_019c392d-4aa2-7e80-8bad-7cf8d8ba9f9d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019c392d-4aa2-76a1-a046-dc341903831d" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_019c392d-4aa2-7e80-8bad-7cf8d8ba9f9d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInInventories_019c392d-4aa2-78a5-978c-6f0f0c4a3bc5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInInventories"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019c392d-4aa2-76a1-a046-dc341903831d" xlink:to="loc_us-gaap_IncreaseDecreaseInInventories_019c392d-4aa2-78a5-978c-6f0f0c4a3bc5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_019c392d-4aa2-7cf5-8cb1-f1b5d53a27c4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019c392d-4aa2-76a1-a046-dc341903831d" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_019c392d-4aa2-7cf5-8cb1-f1b5d53a27c4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayable_019c392d-4aa2-7146-999e-8e8e98b7239a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccountsPayable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019c392d-4aa2-76a1-a046-dc341903831d" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayable_019c392d-4aa2-7146-999e-8e8e98b7239a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedLiabilities_019c392d-4aa2-7dd7-b205-c11da95a599e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccruedLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019c392d-4aa2-76a1-a046-dc341903831d" xlink:to="loc_us-gaap_IncreaseDecreaseInAccruedLiabilities_019c392d-4aa2-7dd7-b205-c11da95a599e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable_019c392d-4aa2-7d45-bf85-01b0f573b557" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019c392d-4aa2-76a1-a046-dc341903831d" xlink:to="loc_us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable_019c392d-4aa2-7d45-bf85-01b0f573b557" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_019c392d-4aa2-7fe3-a79d-0a6f083ca6f7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInContractWithCustomerLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019c392d-4aa2-76a1-a046-dc341903831d" xlink:to="loc_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_019c392d-4aa2-7fe3-a79d-0a6f083ca6f7" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities_019c392d-4aa2-76eb-9240-9ab3718fa8c4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019c392d-4aa2-76a1-a046-dc341903831d" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities_019c392d-4aa2-76eb-9240-9ab3718fa8c4" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019c392d-4aa2-7a27-9108-25ac5641721e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_019c392d-4aa2-7415-9653-9eb18d4f9927" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019c392d-4aa2-7a27-9108-25ac5641721e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019c392d-4aa2-72d2-9a12-89374e11dfe6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019dce18-6aca-79db-b44e-cad51620f8f9" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019c392d-4aa2-72d2-9a12-89374e11dfe6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_019c392d-4aa2-78f6-9a2c-caec966cb8ef" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019c392d-4aa2-72d2-9a12-89374e11dfe6" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_019c392d-4aa2-78f6-9a2c-caec966cb8ef" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireInvestments_019c392d-4aa2-7fb8-8278-b9bbab5ad983" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsToAcquireInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019c392d-4aa2-72d2-9a12-89374e11dfe6" xlink:to="loc_us-gaap_PaymentsToAcquireInvestments_019c392d-4aa2-7fb8-8278-b9bbab5ad983" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019c392d-4aa2-77c6-abbe-3b5f004fe24b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019c392d-4aa2-72d2-9a12-89374e11dfe6" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019c392d-4aa2-77c6-abbe-3b5f004fe24b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019c392d-4aa2-787b-a492-963f4aca7e0f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019dce18-6aca-79db-b44e-cad51620f8f9" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019c392d-4aa2-787b-a492-963f4aca7e0f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfDebt_019c392d-4aa2-7011-bedb-65857f06108b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromIssuanceOfDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019c392d-4aa2-787b-a492-963f4aca7e0f" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfDebt_019c392d-4aa2-7011-bedb-65857f06108b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfDebt_019c392d-4aa2-70d6-9efc-9c83de94abb6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RepaymentsOfDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019c392d-4aa2-787b-a492-963f4aca7e0f" xlink:to="loc_us-gaap_RepaymentsOfDebt_019c392d-4aa2-70d6-9efc-9c83de94abb6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_PaymentOfDebtIssuanceCostsExcludingConvertibleDebt_019e0890-8fd6-7330-ba4d-df3352ed2289" xlink:href="smci-20260331.xsd#smci_PaymentOfDebtIssuanceCostsExcludingConvertibleDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019c392d-4aa2-787b-a492-963f4aca7e0f" xlink:to="loc_smci_PaymentOfDebtIssuanceCostsExcludingConvertibleDebt_019e0890-8fd6-7330-ba4d-df3352ed2289" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromStockOptionsExercised_019c392d-4aa2-7312-bef8-21dd00f421fa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019c392d-4aa2-787b-a492-963f4aca7e0f" xlink:to="loc_us-gaap_ProceedsFromStockOptionsExercised_019c392d-4aa2-7312-bef8-21dd00f421fa" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_019c392d-4aa2-7db7-9608-721f54ecc4fc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019c392d-4aa2-787b-a492-963f4aca7e0f" xlink:to="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_019c392d-4aa2-7db7-9608-721f54ecc4fc" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_PaymentOfDebtIssuanceCostsDueToAmendment_019d6def-c80a-7625-9090-b295e3bf5869" xlink:href="smci-20260331.xsd#smci_PaymentOfDebtIssuanceCostsDueToAmendment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019c392d-4aa2-787b-a492-963f4aca7e0f" xlink:to="loc_smci_PaymentOfDebtIssuanceCostsDueToAmendment_019d6def-c80a-7625-9090-b295e3bf5869" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_ProceedsFromConvertibleDebtNetOfIssuanceCosts_019dce15-efec-7ae8-984d-2e552ac7cc26" xlink:href="smci-20260331.xsd#smci_ProceedsFromConvertibleDebtNetOfIssuanceCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019c392d-4aa2-787b-a492-963f4aca7e0f" xlink:to="loc_smci_ProceedsFromConvertibleDebtNetOfIssuanceCosts_019dce15-efec-7ae8-984d-2e552ac7cc26" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_ProceedsRelatedToReceivablePurchaseAgreementNet_019daecc-d4b9-7ac0-8e49-7af2c54ebf86" xlink:href="smci-20260331.xsd#smci_ProceedsRelatedToReceivablePurchaseAgreementNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019c392d-4aa2-787b-a492-963f4aca7e0f" xlink:to="loc_smci_ProceedsRelatedToReceivablePurchaseAgreementNet_019daecc-d4b9-7ac0-8e49-7af2c54ebf86" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_019c392d-4aa2-7596-920f-611af268c4bd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromPaymentsForOtherFinancingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019c392d-4aa2-787b-a492-963f4aca7e0f" xlink:to="loc_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_019c392d-4aa2-7596-920f-611af268c4bd" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019c392d-4aa2-778c-a20f-67fc91fdeaf7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019c392d-4aa2-787b-a492-963f4aca7e0f" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019c392d-4aa2-778c-a20f-67fc91fdeaf7" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019c392d-4aa2-7d56-a463-7ebbe94488ff" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019dce18-6aca-79db-b44e-cad51620f8f9" xlink:to="loc_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019c392d-4aa2-7d56-a463-7ebbe94488ff" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_019c392d-4aa2-7766-8ff7-9fc5bbabbeae" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019dce18-6aca-79db-b44e-cad51620f8f9" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_019c392d-4aa2-7766-8ff7-9fc5bbabbeae" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019c392d-4aa2-792a-ba77-651488c6b298" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019dce18-6aca-79db-b44e-cad51620f8f9" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019c392d-4aa2-792a-ba77-651488c6b298" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019c392d-4aa2-75f8-912e-d5d68942a669" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SupplementalCashFlowInformationAbstract_019c392d-4aa2-7b6f-bd74-21983d67dd85" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SupplementalCashFlowInformationAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019dce18-6aca-79db-b44e-cad51620f8f9" xlink:to="loc_us-gaap_SupplementalCashFlowInformationAbstract_019c392d-4aa2-7b6f-bd74-21983d67dd85" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestPaidNet_019c392d-4aa2-73be-84c4-534192a7a48d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestPaidNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SupplementalCashFlowInformationAbstract_019c392d-4aa2-7b6f-bd74-21983d67dd85" xlink:to="loc_us-gaap_InterestPaidNet_019c392d-4aa2-73be-84c4-534192a7a48d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxesPaidNet_019c392d-4aa2-73f3-a758-b71cb987eec0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxesPaidNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SupplementalCashFlowInformationAbstract_019c392d-4aa2-7b6f-bd74-21983d67dd85" xlink:to="loc_us-gaap_IncomeTaxesPaidNet_019c392d-4aa2-73f3-a758-b71cb987eec0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_019c392d-4aa2-71f0-98cf-1834fb7b6fc7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019dce18-6aca-79db-b44e-cad51620f8f9" xlink:to="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_019c392d-4aa2-71f0-98cf-1834fb7b6fc7" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalExpendituresIncurredButNotYetPaid_019c392d-4aa2-7208-a816-59912ff0ff60" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CapitalExpendituresIncurredButNotYetPaid"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_019c392d-4aa2-71f0-98cf-1834fb7b6fc7" xlink:to="loc_us-gaap_CapitalExpendituresIncurredButNotYetPaid_019c392d-4aa2-7208-a816-59912ff0ff60" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability_019c392d-4aa2-74f3-84a0-8a4d358cc411" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_019c392d-4aa2-71f0-98cf-1834fb7b6fc7" xlink:to="loc_us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability_019c392d-4aa2-74f3-84a0-8a4d358cc411" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTransfersAndChanges_019c392d-4aa2-755c-a7fd-58c211276ebb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentTransfersAndChanges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_019c392d-4aa2-71f0-98cf-1834fb7b6fc7" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTransfersAndChanges_019c392d-4aa2-755c-a7fd-58c211276ebb" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.supermicro.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWSParenthetical" xlink:type="simple" xlink:href="smci-20260331.xsd#CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWSParenthetical"/>
  <link:definitionLink xlink:role="http://www.supermicro.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWSParenthetical" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019c392d-4aa2-7031-83df-7e6785eca5e8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019c392d-4aa2-7b5e-ace4-6d6d0befa59a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019c392d-4aa2-7031-83df-7e6785eca5e8" xlink:to="loc_us-gaap_StatementTable_019c392d-4aa2-7b5e-ace4-6d6d0befa59a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c392d-4aa2-76dd-b583-c2b5db8049d3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019c392d-4aa2-7b5e-ace4-6d6d0befa59a" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c392d-4aa2-76dd-b583-c2b5db8049d3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019c392d-4aa2-76dd-b583-c2b5db8049d3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c392d-4aa2-76dd-b583-c2b5db8049d3" xlink:to="loc_us-gaap_RelatedPartyDomain_019c392d-4aa2-76dd-b583-c2b5db8049d3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019c392d-4aa2-795c-b828-c112e53cca31" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c392d-4aa2-76dd-b583-c2b5db8049d3" xlink:to="loc_us-gaap_RelatedPartyDomain_019c392d-4aa2-795c-b828-c112e53cca31" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_019c392d-4aa2-7662-9bde-42fa752e9b9a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019c392d-4aa2-795c-b828-c112e53cca31" xlink:to="loc_us-gaap_RelatedPartyMember_019c392d-4aa2-7662-9bde-42fa752e9b9a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019dce17-df86-7680-9782-948d99fc5723" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019c392d-4aa2-7b5e-ace4-6d6d0befa59a" xlink:to="loc_us-gaap_DebtInstrumentAxis_019dce17-df86-7680-9782-948d99fc5723" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019dce17-df86-7680-9782-948d99fc5723_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019dce17-df86-7680-9782-948d99fc5723" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019dce17-df86-7680-9782-948d99fc5723_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019dce17-df86-7a2a-bb08-d617e7fea559" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019dce17-df86-7680-9782-948d99fc5723" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019dce17-df86-7a2a-bb08-d617e7fea559" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_ConvertibleSeniorNotesDue2028Member_019dce17-df86-73f7-886d-0a1a8c5b3977" xlink:href="smci-20260331.xsd#smci_ConvertibleSeniorNotesDue2028Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019dce17-df86-7a2a-bb08-d617e7fea559" xlink:to="loc_smci_ConvertibleSeniorNotesDue2028Member_019dce17-df86-73f7-886d-0a1a8c5b3977" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncashInvestingAndFinancingItemsAbstract_019c392d-4aa2-7858-909b-21ca8ce46570" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NoncashInvestingAndFinancingItemsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019c392d-4aa2-7031-83df-7e6785eca5e8" xlink:to="loc_us-gaap_NoncashInvestingAndFinancingItemsAbstract_019c392d-4aa2-7858-909b-21ca8ce46570" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_019c392d-4aa2-787d-a30c-31d2e057d6a3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoncashInvestingAndFinancingItemsAbstract_019c392d-4aa2-7858-909b-21ca8ce46570" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_019c392d-4aa2-787d-a30c-31d2e057d6a3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_019c392d-4aa2-70e7-8ebd-2827681bd845" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoncashInvestingAndFinancingItemsAbstract_019c392d-4aa2-7858-909b-21ca8ce46570" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_019c392d-4aa2-70e7-8ebd-2827681bd845" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayable_019c392d-4aa2-7672-aef4-3fded912c9fa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccountsPayable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoncashInvestingAndFinancingItemsAbstract_019c392d-4aa2-7858-909b-21ca8ce46570" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayable_019c392d-4aa2-7672-aef4-3fded912c9fa" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedLiabilities_019c392d-4aa2-7533-b6aa-454536672c8d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccruedLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoncashInvestingAndFinancingItemsAbstract_019c392d-4aa2-7858-909b-21ca8ce46570" xlink:to="loc_us-gaap_IncreaseDecreaseInAccruedLiabilities_019c392d-4aa2-7533-b6aa-454536672c8d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities_019c392d-4aa2-7d09-8e6b-9a59c69b71ef" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoncashInvestingAndFinancingItemsAbstract_019c392d-4aa2-7858-909b-21ca8ce46570" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities_019c392d-4aa2-7d09-8e6b-9a59c69b71ef" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_019c392d-4aa2-774c-9443-72d44b5f97aa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoncashInvestingAndFinancingItemsAbstract_019c392d-4aa2-7858-909b-21ca8ce46570" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_019c392d-4aa2-774c-9443-72d44b5f97aa" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDebtIssuanceCosts_019dce17-df86-7287-a389-947859c29b96" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsOfDebtIssuanceCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoncashInvestingAndFinancingItemsAbstract_019c392d-4aa2-7858-909b-21ca8ce46570" xlink:to="loc_us-gaap_PaymentsOfDebtIssuanceCosts_019dce17-df86-7287-a389-947859c29b96" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalExpendituresIncurredButNotYetPaid_019c392d-4aa2-76ef-889e-f3044207a255" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CapitalExpendituresIncurredButNotYetPaid"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoncashInvestingAndFinancingItemsAbstract_019c392d-4aa2-7858-909b-21ca8ce46570" xlink:to="loc_us-gaap_CapitalExpendituresIncurredButNotYetPaid_019c392d-4aa2-76ef-889e-f3044207a255" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.supermicro.com/role/OrganizationandSummaryofSignificantAccountingPoliciesDetails" xlink:type="simple" xlink:href="smci-20260331.xsd#OrganizationandSummaryofSignificantAccountingPoliciesDetails"/>
  <link:definitionLink xlink:role="http://www.supermicro.com/role/OrganizationandSummaryofSignificantAccountingPoliciesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskLineItems_019c392d-4aa2-75be-b98b-60d72bbee3ab" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTable_019c392d-4aa2-7ee3-8ecd-b4e92707b377" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_019c392d-4aa2-75be-b98b-60d72bbee3ab" xlink:to="loc_us-gaap_ConcentrationRiskTable_019c392d-4aa2-7ee3-8ecd-b4e92707b377" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MajorCustomersAxis_019c392d-4aa2-7989-9ca9-6f826a2cd22c" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MajorCustomersAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_019c392d-4aa2-7ee3-8ecd-b4e92707b377" xlink:to="loc_srt_MajorCustomersAxis_019c392d-4aa2-7989-9ca9-6f826a2cd22c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_019c392d-4aa2-7989-9ca9-6f826a2cd22c_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_MajorCustomersAxis_019c392d-4aa2-7989-9ca9-6f826a2cd22c" xlink:to="loc_srt_NameOfMajorCustomerDomain_019c392d-4aa2-7989-9ca9-6f826a2cd22c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_019c392d-4aa2-7bef-a1d3-3461c43be6a6" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_MajorCustomersAxis_019c392d-4aa2-7989-9ca9-6f826a2cd22c" xlink:to="loc_srt_NameOfMajorCustomerDomain_019c392d-4aa2-7bef-a1d3-3461c43be6a6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_CustomerAMember_019c392d-4aa2-7624-b120-580f2f01808d" xlink:href="smci-20260331.xsd#smci_CustomerAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_019c392d-4aa2-7bef-a1d3-3461c43be6a6" xlink:to="loc_smci_CustomerAMember_019c392d-4aa2-7624-b120-580f2f01808d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_CustomerBMember_019c392d-4aa2-78e0-8ddd-84c08cc44d75" xlink:href="smci-20260331.xsd#smci_CustomerBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_019c392d-4aa2-7bef-a1d3-3461c43be6a6" xlink:to="loc_smci_CustomerBMember_019c392d-4aa2-78e0-8ddd-84c08cc44d75" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_CustomerCMember_019c392d-4aa2-71f0-b55e-b29342199124" xlink:href="smci-20260331.xsd#smci_CustomerCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_019c392d-4aa2-7bef-a1d3-3461c43be6a6" xlink:to="loc_smci_CustomerCMember_019c392d-4aa2-71f0-b55e-b29342199124" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_CustomerDMember_019daed2-1338-7c71-a1f7-faafcd99774a" xlink:href="smci-20260331.xsd#smci_CustomerDMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_019c392d-4aa2-7bef-a1d3-3461c43be6a6" xlink:to="loc_smci_CustomerDMember_019daed2-1338-7c71-a1f7-faafcd99774a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019c392d-4aa2-743e-85dd-0979a94371bd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_019c392d-4aa2-7ee3-8ecd-b4e92707b377" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019c392d-4aa2-743e-85dd-0979a94371bd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019c392d-4aa2-743e-85dd-0979a94371bd_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019c392d-4aa2-743e-85dd-0979a94371bd" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019c392d-4aa2-743e-85dd-0979a94371bd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019c392d-4aa2-7cf3-b526-7f6a9df8d348" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019c392d-4aa2-743e-85dd-0979a94371bd" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019c392d-4aa2-7cf3-b526-7f6a9df8d348" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableMember_019c392d-4aa2-75ff-8ef3-d6ad6b626e55" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsReceivableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019c392d-4aa2-7cf3-b526-7f6a9df8d348" xlink:to="loc_us-gaap_AccountsReceivableMember_019c392d-4aa2-75ff-8ef3-d6ad6b626e55" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_019c392d-4aa2-7103-9336-a5f411573baa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_019c392d-4aa2-7ee3-8ecd-b4e92707b377" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_019c392d-4aa2-7103-9336-a5f411573baa" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_019c392d-4aa2-7103-9336-a5f411573baa_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_019c392d-4aa2-7103-9336-a5f411573baa" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_019c392d-4aa2-7103-9336-a5f411573baa_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_019c392d-4aa2-71cb-a9bb-1eba8db3f780" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_019c392d-4aa2-7103-9336-a5f411573baa" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_019c392d-4aa2-71cb-a9bb-1eba8db3f780" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerConcentrationRiskMember_019c392d-4aa2-7e86-8cc5-33fd86ae3436" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CustomerConcentrationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_019c392d-4aa2-71cb-a9bb-1eba8db3f780" xlink:to="loc_us-gaap_CustomerConcentrationRiskMember_019c392d-4aa2-7e86-8cc5-33fd86ae3436" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_019c392d-4aa2-7044-9892-da45d8a55af1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskPercentage1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_019c392d-4aa2-75be-b98b-60d72bbee3ab" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_019c392d-4aa2-7044-9892-da45d8a55af1" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.supermicro.com/role/SegmentInformationNarrativeDetails" xlink:type="simple" xlink:href="smci-20260331.xsd#SegmentInformationNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.supermicro.com/role/SegmentInformationNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_019c392d-4aa2-75d4-bafc-edc4d0212bdb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_019c392d-4aa2-7f45-82ca-6671c9c8bd73" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019c392d-4aa2-75d4-bafc-edc4d0212bdb" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_019c392d-4aa2-7f45-82ca-6671c9c8bd73" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_019c392d-4aa2-7463-80a0-0d7b5cd2d6f2" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019c392d-4aa2-7f45-82ca-6671c9c8bd73" xlink:to="loc_srt_ProductOrServiceAxis_019c392d-4aa2-7463-80a0-0d7b5cd2d6f2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019c392d-4aa2-7463-80a0-0d7b5cd2d6f2_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_019c392d-4aa2-7463-80a0-0d7b5cd2d6f2" xlink:to="loc_srt_ProductsAndServicesDomain_019c392d-4aa2-7463-80a0-0d7b5cd2d6f2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019c392d-4aa2-78bf-8265-04b0ccfaef06" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_019c392d-4aa2-7463-80a0-0d7b5cd2d6f2" xlink:to="loc_srt_ProductsAndServicesDomain_019c392d-4aa2-78bf-8265-04b0ccfaef06" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_ServiceAndSoftwareMember_019c392d-4aa2-7bfa-97f1-ebcb98a43c9e" xlink:href="smci-20260331.xsd#smci_ServiceAndSoftwareMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019c392d-4aa2-78bf-8265-04b0ccfaef06" xlink:to="loc_smci_ServiceAndSoftwareMember_019c392d-4aa2-7bfa-97f1-ebcb98a43c9e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServiceMember_019c392d-4aa2-7d62-b1ed-2a29e96a22a8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ServiceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019c392d-4aa2-78bf-8265-04b0ccfaef06" xlink:to="loc_us-gaap_ServiceMember_019c392d-4aa2-7d62-b1ed-2a29e96a22a8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019c392d-4aa2-79d4-9c01-1311f04af804" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019c392d-4aa2-7f45-82ca-6671c9c8bd73" xlink:to="loc_srt_RangeAxis_019c392d-4aa2-79d4-9c01-1311f04af804" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019c392d-4aa2-79d4-9c01-1311f04af804_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019c392d-4aa2-79d4-9c01-1311f04af804" xlink:to="loc_srt_RangeMember_019c392d-4aa2-79d4-9c01-1311f04af804_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019c392d-4aa2-7882-a97e-a44f2983e8d9" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019c392d-4aa2-79d4-9c01-1311f04af804" xlink:to="loc_srt_RangeMember_019c392d-4aa2-7882-a97e-a44f2983e8d9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019c392d-4aa2-7480-b1a1-5cf735221519" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019c392d-4aa2-7882-a97e-a44f2983e8d9" xlink:to="loc_srt_MinimumMember_019c392d-4aa2-7480-b1a1-5cf735221519" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019c392d-4aa2-7d3d-9313-f304f8e8fc93" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019c392d-4aa2-7882-a97e-a44f2983e8d9" xlink:to="loc_srt_MaximumMember_019c392d-4aa2-7d3d-9313-f304f8e8fc93" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_019c392d-4aa2-7cd8-bfa0-03ee76f9cc3f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019c392d-4aa2-7f45-82ca-6671c9c8bd73" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_019c392d-4aa2-7cd8-bfa0-03ee76f9cc3f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfOperatingSegments_019c392d-4aa2-79ff-83a9-b222949be56b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NumberOfOperatingSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019c392d-4aa2-75d4-bafc-edc4d0212bdb" xlink:to="loc_us-gaap_NumberOfOperatingSegments_019c392d-4aa2-79ff-83a9-b222949be56b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfReportableSegments_019c392d-4aa2-77dc-9215-2ad63732f85c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NumberOfReportableSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019c392d-4aa2-75d4-bafc-edc4d0212bdb" xlink:to="loc_us-gaap_NumberOfReportableSegments_019c392d-4aa2-77dc-9215-2ad63732f85c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019c392d-4aa2-74bf-8ad3-72b44d538fe4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019c392d-4aa2-75d4-bafc-edc4d0212bdb" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019c392d-4aa2-74bf-8ad3-72b44d538fe4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_RevenuePerformanceObligationPaymentTerm_019c392d-4aa2-7584-8e98-61234e1c7fc4" xlink:href="smci-20260331.xsd#smci_RevenuePerformanceObligationPaymentTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019c392d-4aa2-75d4-bafc-edc4d0212bdb" xlink:to="loc_smci_RevenuePerformanceObligationPaymentTerm_019c392d-4aa2-7584-8e98-61234e1c7fc4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiability_019c392d-4aa2-7520-8d43-7ee6d8c15774" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ContractWithCustomerLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019c392d-4aa2-75d4-bafc-edc4d0212bdb" xlink:to="loc_us-gaap_ContractWithCustomerLiability_019c392d-4aa2-7520-8d43-7ee6d8c15774" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_019c392d-4aa2-78a4-af6a-08fc952f2cc9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ContractWithCustomerLiabilityRevenueRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019c392d-4aa2-75d4-bafc-edc4d0212bdb" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_019c392d-4aa2-78a4-af6a-08fc952f2cc9" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligation_019c392d-4aa2-7ea1-9fff-7323079f5c79" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueRemainingPerformanceObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019c392d-4aa2-75d4-bafc-edc4d0212bdb" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligation_019c392d-4aa2-7ea1-9fff-7323079f5c79" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationPercentage_019c392d-4aa2-7875-b15d-6174b6e9ccf3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueRemainingPerformanceObligationPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019c392d-4aa2-75d4-bafc-edc4d0212bdb" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationPercentage_019c392d-4aa2-7875-b15d-6174b6e9ccf3" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_019daed6-a0cc-7662-80fc-8a35b6850b7f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019c392d-4aa2-75d4-bafc-edc4d0212bdb" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_019daed6-a0cc-7662-80fc-8a35b6850b7f" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.supermicro.com/role/SegmentInformationNarrativeDetails_1" xlink:type="simple" xlink:href="smci-20260331.xsd#SegmentInformationNarrativeDetails_1"/>
  <link:definitionLink xlink:role="http://www.supermicro.com/role/SegmentInformationNarrativeDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_019c392d-4aa2-75d4-bafc-edc4d0212bdb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_019c392d-4aa2-7f45-82ca-6671c9c8bd73" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019c392d-4aa2-75d4-bafc-edc4d0212bdb" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_019c392d-4aa2-7f45-82ca-6671c9c8bd73" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_019c392d-4aa2-7463-80a0-0d7b5cd2d6f2" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019c392d-4aa2-7f45-82ca-6671c9c8bd73" xlink:to="loc_srt_ProductOrServiceAxis_019c392d-4aa2-7463-80a0-0d7b5cd2d6f2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019c392d-4aa2-7463-80a0-0d7b5cd2d6f2_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_019c392d-4aa2-7463-80a0-0d7b5cd2d6f2" xlink:to="loc_srt_ProductsAndServicesDomain_019c392d-4aa2-7463-80a0-0d7b5cd2d6f2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019c392d-4aa2-78bf-8265-04b0ccfaef06" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_019c392d-4aa2-7463-80a0-0d7b5cd2d6f2" xlink:to="loc_srt_ProductsAndServicesDomain_019c392d-4aa2-78bf-8265-04b0ccfaef06" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_ServiceAndSoftwareMember_019c392d-4aa2-7bfa-97f1-ebcb98a43c9e" xlink:href="smci-20260331.xsd#smci_ServiceAndSoftwareMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019c392d-4aa2-78bf-8265-04b0ccfaef06" xlink:to="loc_smci_ServiceAndSoftwareMember_019c392d-4aa2-7bfa-97f1-ebcb98a43c9e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServiceMember_019c392d-4aa2-7d62-b1ed-2a29e96a22a8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ServiceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019c392d-4aa2-78bf-8265-04b0ccfaef06" xlink:to="loc_us-gaap_ServiceMember_019c392d-4aa2-7d62-b1ed-2a29e96a22a8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019c392d-4aa2-79d4-9c01-1311f04af804" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019c392d-4aa2-7f45-82ca-6671c9c8bd73" xlink:to="loc_srt_RangeAxis_019c392d-4aa2-79d4-9c01-1311f04af804" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019c392d-4aa2-79d4-9c01-1311f04af804_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019c392d-4aa2-79d4-9c01-1311f04af804" xlink:to="loc_srt_RangeMember_019c392d-4aa2-79d4-9c01-1311f04af804_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019c392d-4aa2-7882-a97e-a44f2983e8d9" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019c392d-4aa2-79d4-9c01-1311f04af804" xlink:to="loc_srt_RangeMember_019c392d-4aa2-7882-a97e-a44f2983e8d9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019c392d-4aa2-7480-b1a1-5cf735221519" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019c392d-4aa2-7882-a97e-a44f2983e8d9" xlink:to="loc_srt_MinimumMember_019c392d-4aa2-7480-b1a1-5cf735221519" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019c392d-4aa2-7d3d-9313-f304f8e8fc93" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019c392d-4aa2-7882-a97e-a44f2983e8d9" xlink:to="loc_srt_MaximumMember_019c392d-4aa2-7d3d-9313-f304f8e8fc93" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfOperatingSegments_019c392d-4aa2-79ff-83a9-b222949be56b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NumberOfOperatingSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019c392d-4aa2-75d4-bafc-edc4d0212bdb" xlink:to="loc_us-gaap_NumberOfOperatingSegments_019c392d-4aa2-79ff-83a9-b222949be56b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfReportableSegments_019c392d-4aa2-77dc-9215-2ad63732f85c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NumberOfReportableSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019c392d-4aa2-75d4-bafc-edc4d0212bdb" xlink:to="loc_us-gaap_NumberOfReportableSegments_019c392d-4aa2-77dc-9215-2ad63732f85c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019c392d-4aa2-74bf-8ad3-72b44d538fe4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019c392d-4aa2-75d4-bafc-edc4d0212bdb" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019c392d-4aa2-74bf-8ad3-72b44d538fe4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_RevenuePerformanceObligationPaymentTerm_019c392d-4aa2-7584-8e98-61234e1c7fc4" xlink:href="smci-20260331.xsd#smci_RevenuePerformanceObligationPaymentTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019c392d-4aa2-75d4-bafc-edc4d0212bdb" xlink:to="loc_smci_RevenuePerformanceObligationPaymentTerm_019c392d-4aa2-7584-8e98-61234e1c7fc4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiability_019c392d-4aa2-7520-8d43-7ee6d8c15774" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ContractWithCustomerLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019c392d-4aa2-75d4-bafc-edc4d0212bdb" xlink:to="loc_us-gaap_ContractWithCustomerLiability_019c392d-4aa2-7520-8d43-7ee6d8c15774" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_019c392d-4aa2-78a4-af6a-08fc952f2cc9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ContractWithCustomerLiabilityRevenueRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019c392d-4aa2-75d4-bafc-edc4d0212bdb" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_019c392d-4aa2-78a4-af6a-08fc952f2cc9" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligation_019c392d-4aa2-7ea1-9fff-7323079f5c79" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueRemainingPerformanceObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019c392d-4aa2-75d4-bafc-edc4d0212bdb" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligation_019c392d-4aa2-7ea1-9fff-7323079f5c79" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationPercentage_019c392d-4aa2-7875-b15d-6174b6e9ccf3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueRemainingPerformanceObligationPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019c392d-4aa2-75d4-bafc-edc4d0212bdb" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationPercentage_019c392d-4aa2-7875-b15d-6174b6e9ccf3" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_019daed6-a0cc-7662-80fc-8a35b6850b7f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019c392d-4aa2-75d4-bafc-edc4d0212bdb" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_019daed6-a0cc-7662-80fc-8a35b6850b7f" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.supermicro.com/role/SegmentInformationScheduleofDisaggregationofRevenueDetails" xlink:type="simple" xlink:href="smci-20260331.xsd#SegmentInformationScheduleofDisaggregationofRevenueDetails"/>
  <link:definitionLink xlink:role="http://www.supermicro.com/role/SegmentInformationScheduleofDisaggregationofRevenueDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_019c392d-4aa2-7afc-91fb-6d3f47d7e93d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_019c392d-4aa2-78b1-8618-ed318a77b19d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019c392d-4aa2-7afc-91fb-6d3f47d7e93d" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_019c392d-4aa2-78b1-8618-ed318a77b19d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_019c392d-4aa2-7242-b044-de6234f9608c" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019c392d-4aa2-78b1-8618-ed318a77b19d" xlink:to="loc_srt_StatementGeographicalAxis_019c392d-4aa2-7242-b044-de6234f9608c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019c392d-4aa2-7242-b044-de6234f9608c_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_019c392d-4aa2-7242-b044-de6234f9608c" xlink:to="loc_srt_SegmentGeographicalDomain_019c392d-4aa2-7242-b044-de6234f9608c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019c392d-4aa2-78b8-9865-25811776c5c3" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_019c392d-4aa2-7242-b044-de6234f9608c" xlink:to="loc_srt_SegmentGeographicalDomain_019c392d-4aa2-78b8-9865-25811776c5c3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_019c392d-4aa2-708e-b2fe-5449b177028f" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_US"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019c392d-4aa2-78b8-9865-25811776c5c3" xlink:to="loc_country_US_019c392d-4aa2-708e-b2fe-5449b177028f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonUsMember_019c392d-4aa2-7a08-b3ba-d3c0f7c9f052" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NonUsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019c392d-4aa2-78b8-9865-25811776c5c3" xlink:to="loc_us-gaap_NonUsMember_019c392d-4aa2-7a08-b3ba-d3c0f7c9f052" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019c392d-4aa2-7730-a1a2-ac7e08cf0cac" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019c392d-4aa2-78b1-8618-ed318a77b19d" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019c392d-4aa2-7730-a1a2-ac7e08cf0cac" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019c392d-4aa2-7730-a1a2-ac7e08cf0cac_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019c392d-4aa2-7730-a1a2-ac7e08cf0cac" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019c392d-4aa2-7730-a1a2-ac7e08cf0cac_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019c392d-4aa2-754f-8965-0defa5932d6a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019c392d-4aa2-7730-a1a2-ac7e08cf0cac" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019c392d-4aa2-754f-8965-0defa5932d6a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesRevenueNetMember_019c392d-4aa2-7c61-af3b-4181a691e06b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SalesRevenueNetMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019c392d-4aa2-754f-8965-0defa5932d6a" xlink:to="loc_us-gaap_SalesRevenueNetMember_019c392d-4aa2-7c61-af3b-4181a691e06b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_019c392d-4aa2-743b-80f6-66280fbec87e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019c392d-4aa2-78b1-8618-ed318a77b19d" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_019c392d-4aa2-743b-80f6-66280fbec87e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_019c392d-4aa2-743b-80f6-66280fbec87e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_019c392d-4aa2-743b-80f6-66280fbec87e" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_019c392d-4aa2-743b-80f6-66280fbec87e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_019c392d-4aa2-774d-b48a-8b723a4cf786" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_019c392d-4aa2-743b-80f6-66280fbec87e" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_019c392d-4aa2-774d-b48a-8b723a4cf786" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeographicConcentrationRiskMember_019c392d-4aa2-7cb7-b4dc-6b386c59c858" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GeographicConcentrationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_019c392d-4aa2-774d-b48a-8b723a4cf786" xlink:to="loc_us-gaap_GeographicConcentrationRiskMember_019c392d-4aa2-7cb7-b4dc-6b386c59c858" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019c392d-4aa2-70bd-9934-5f3be3ab0ea9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019c392d-4aa2-7afc-91fb-6d3f47d7e93d" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019c392d-4aa2-70bd-9934-5f3be3ab0ea9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_019c392d-4aa2-710b-a51e-5e691ee9ee27" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskPercentage1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019c392d-4aa2-7afc-91fb-6d3f47d7e93d" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_019c392d-4aa2-710b-a51e-5e691ee9ee27" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.supermicro.com/role/SegmentInformationScheduleofTotalNetSalesConcentrationRiskDetails" xlink:type="simple" xlink:href="smci-20260331.xsd#SegmentInformationScheduleofTotalNetSalesConcentrationRiskDetails"/>
  <link:definitionLink xlink:role="http://www.supermicro.com/role/SegmentInformationScheduleofTotalNetSalesConcentrationRiskDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_019c392d-4aa2-720b-a62c-936ea62f8196" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_019c392d-4aa2-768e-9096-d6a111a73c92" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019c392d-4aa2-720b-a62c-936ea62f8196" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_019c392d-4aa2-768e-9096-d6a111a73c92" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MajorCustomersAxis_019c392d-4aa2-72f7-9bf4-f74c90ec4cb7" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MajorCustomersAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019c392d-4aa2-768e-9096-d6a111a73c92" xlink:to="loc_srt_MajorCustomersAxis_019c392d-4aa2-72f7-9bf4-f74c90ec4cb7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_019c392d-4aa2-72f7-9bf4-f74c90ec4cb7_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_MajorCustomersAxis_019c392d-4aa2-72f7-9bf4-f74c90ec4cb7" xlink:to="loc_srt_NameOfMajorCustomerDomain_019c392d-4aa2-72f7-9bf4-f74c90ec4cb7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_019c392d-4aa2-772d-aea6-ccbc79c6ea13" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_MajorCustomersAxis_019c392d-4aa2-72f7-9bf4-f74c90ec4cb7" xlink:to="loc_srt_NameOfMajorCustomerDomain_019c392d-4aa2-772d-aea6-ccbc79c6ea13" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_CustomerAMember_019c392d-4aa2-7144-9639-6c1ef51dfa4a" xlink:href="smci-20260331.xsd#smci_CustomerAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_019c392d-4aa2-772d-aea6-ccbc79c6ea13" xlink:to="loc_smci_CustomerAMember_019c392d-4aa2-7144-9639-6c1ef51dfa4a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_CustomerBMember_019c392d-4aa2-793a-a993-831a2fa5d994" xlink:href="smci-20260331.xsd#smci_CustomerBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_019c392d-4aa2-772d-aea6-ccbc79c6ea13" xlink:to="loc_smci_CustomerBMember_019c392d-4aa2-793a-a993-831a2fa5d994" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_CustomerCMember_019c392d-4aa2-78c7-a9e6-bca2ca44dfa5" xlink:href="smci-20260331.xsd#smci_CustomerCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_019c392d-4aa2-772d-aea6-ccbc79c6ea13" xlink:to="loc_smci_CustomerCMember_019c392d-4aa2-78c7-a9e6-bca2ca44dfa5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_CustomerDMember_019d6e01-9868-726e-95f7-98b052f19ba2" xlink:href="smci-20260331.xsd#smci_CustomerDMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_019c392d-4aa2-772d-aea6-ccbc79c6ea13" xlink:to="loc_smci_CustomerDMember_019d6e01-9868-726e-95f7-98b052f19ba2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019c392d-4aa2-7ad3-8171-f805685b1a00" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019c392d-4aa2-768e-9096-d6a111a73c92" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019c392d-4aa2-7ad3-8171-f805685b1a00" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019c392d-4aa2-7ad3-8171-f805685b1a00_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019c392d-4aa2-7ad3-8171-f805685b1a00" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019c392d-4aa2-7ad3-8171-f805685b1a00_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019c392d-4aa2-77bc-bd6f-a421b971527e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019c392d-4aa2-7ad3-8171-f805685b1a00" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019c392d-4aa2-77bc-bd6f-a421b971527e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesRevenueNetMember_019c392d-4aa2-7837-b7d7-7cf6e00457c3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SalesRevenueNetMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019c392d-4aa2-77bc-bd6f-a421b971527e" xlink:to="loc_us-gaap_SalesRevenueNetMember_019c392d-4aa2-7837-b7d7-7cf6e00457c3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_019c392d-4aa2-777f-869e-db1da8945d2c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019c392d-4aa2-768e-9096-d6a111a73c92" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_019c392d-4aa2-777f-869e-db1da8945d2c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_019c392d-4aa2-777f-869e-db1da8945d2c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_019c392d-4aa2-777f-869e-db1da8945d2c" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_019c392d-4aa2-777f-869e-db1da8945d2c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_019c392d-4aa2-732c-9e1d-fc8189cdebb1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_019c392d-4aa2-777f-869e-db1da8945d2c" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_019c392d-4aa2-732c-9e1d-fc8189cdebb1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerConcentrationRiskMember_019c392d-4aa2-76bc-a35f-61bc438036ec" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CustomerConcentrationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_019c392d-4aa2-732c-9e1d-fc8189cdebb1" xlink:to="loc_us-gaap_CustomerConcentrationRiskMember_019c392d-4aa2-76bc-a35f-61bc438036ec" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_019c392d-4aa2-7111-bc4b-816987498b11" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskPercentage1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019c392d-4aa2-720b-a62c-936ea62f8196" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_019c392d-4aa2-7111-bc4b-816987498b11" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.supermicro.com/role/FinancialInstrumentsandFairValueMeasurementsScheduleofCashEquivalentsandLongTermInvestmentsMeasuredatFairvalueonaRecurringBasisDetails" xlink:type="simple" xlink:href="smci-20260331.xsd#FinancialInstrumentsandFairValueMeasurementsScheduleofCashEquivalentsandLongTermInvestmentsMeasuredatFairvalueonaRecurringBasisDetails"/>
  <link:definitionLink xlink:role="http://www.supermicro.com/role/FinancialInstrumentsandFairValueMeasurementsScheduleofCashEquivalentsandLongTermInvestmentsMeasuredatFairvalueonaRecurringBasisDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019c392d-4aa2-7f88-80f2-66b888a6e872" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019c392d-4aa2-7c39-a0cb-cdf2d8797766" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019c392d-4aa2-7f88-80f2-66b888a6e872" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019c392d-4aa2-7c39-a0cb-cdf2d8797766" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019c392d-4aa2-73c9-b731-23bcafd283f6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019c392d-4aa2-7c39-a0cb-cdf2d8797766" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019c392d-4aa2-73c9-b731-23bcafd283f6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019c392d-4aa2-73c9-b731-23bcafd283f6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019c392d-4aa2-73c9-b731-23bcafd283f6" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019c392d-4aa2-73c9-b731-23bcafd283f6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019c392d-4aa2-7c0a-aa9e-6747f2bb4991" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019c392d-4aa2-73c9-b731-23bcafd283f6" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019c392d-4aa2-7c0a-aa9e-6747f2bb4991" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_019c392d-4aa2-70c2-b512-b1a96ab4c44f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019c392d-4aa2-7c0a-aa9e-6747f2bb4991" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_019c392d-4aa2-70c2-b512-b1a96ab4c44f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_019c392d-4aa2-790a-832c-1e788b6df673" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019c392d-4aa2-7c0a-aa9e-6747f2bb4991" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_019c392d-4aa2-790a-832c-1e788b6df673" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_019c392d-4aa2-75a0-af0c-88825c03fe16" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019c392d-4aa2-7c0a-aa9e-6747f2bb4991" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_019c392d-4aa2-75a0-af0c-88825c03fe16" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAxis_019c392d-4aa2-7253-81e7-2755280e752e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019c392d-4aa2-7c39-a0cb-cdf2d8797766" xlink:to="loc_us-gaap_CashAndCashEquivalentsAxis_019c392d-4aa2-7253-81e7-2755280e752e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019c392d-4aa2-7253-81e7-2755280e752e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CashAndCashEquivalentsAxis_019c392d-4aa2-7253-81e7-2755280e752e" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019c392d-4aa2-7253-81e7-2755280e752e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019c392d-4aa2-7b72-83ec-545a026b20c5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CashAndCashEquivalentsAxis_019c392d-4aa2-7253-81e7-2755280e752e" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019c392d-4aa2-7b72-83ec-545a026b20c5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MoneyMarketFundsMember_019c392d-4aa2-78fe-aa4c-1037e16eb720" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MoneyMarketFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019c392d-4aa2-7b72-83ec-545a026b20c5" xlink:to="loc_us-gaap_MoneyMarketFundsMember_019c392d-4aa2-78fe-aa4c-1037e16eb720" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CertificatesOfDepositMember_019c392d-4aa2-7214-be82-9b6d0e41de6a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CertificatesOfDepositMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019c392d-4aa2-7b72-83ec-545a026b20c5" xlink:to="loc_us-gaap_CertificatesOfDepositMember_019c392d-4aa2-7214-be82-9b6d0e41de6a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosureAbstract_019c392d-4aa2-793c-bc84-fab4fda3a1af" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsFairValueDisclosureAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019c392d-4aa2-7f88-80f2-66b888a6e872" xlink:to="loc_us-gaap_AssetsFairValueDisclosureAbstract_019c392d-4aa2-793c-bc84-fab4fda3a1af" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_019c392d-4aa2-776b-8f20-89e3c4dc74d7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_019c392d-4aa2-793c-bc84-fab4fda3a1af" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_019c392d-4aa2-776b-8f20-89e3c4dc74d7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNiCurrentAndNoncurrent_019c392d-4aa2-7cff-aa67-6f42d27e3b6b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesFvNiCurrentAndNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_019c392d-4aa2-793c-bc84-fab4fda3a1af" xlink:to="loc_us-gaap_EquitySecuritiesFvNiCurrentAndNoncurrent_019c392d-4aa2-7cff-aa67-6f42d27e3b6b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAbstract_019c392d-4aa2-7e75-ac1d-6f2289e493d4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_019c392d-4aa2-793c-bc84-fab4fda3a1af" xlink:to="loc_us-gaap_DebtSecuritiesAbstract_019c392d-4aa2-7e75-ac1d-6f2289e493d4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_019c392d-4aa2-7293-b9ed-140140ac7ff9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtSecuritiesAbstract_019c392d-4aa2-7e75-ac1d-6f2289e493d4" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_019c392d-4aa2-7293-b9ed-140140ac7ff9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_019c392d-4aa2-7fce-8a69-b1738070ce56" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_019c392d-4aa2-793c-bc84-fab4fda3a1af" xlink:to="loc_us-gaap_AssetsFairValueDisclosure_019c392d-4aa2-7fce-8a69-b1738070ce56" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.supermicro.com/role/FinancialInstrumentsandFairValueMeasurementsNarrativeDetails" xlink:type="simple" xlink:href="smci-20260331.xsd#FinancialInstrumentsandFairValueMeasurementsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.supermicro.com/role/FinancialInstrumentsandFairValueMeasurementsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019c392d-4aa2-7171-bf7c-3e0dfc5843c4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019c392d-4aa2-7031-973f-dea8ae70bed7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019c392d-4aa2-7171-bf7c-3e0dfc5843c4" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019c392d-4aa2-7031-973f-dea8ae70bed7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019c392d-4aa2-7c9b-8f97-de39dc2c2785" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019c392d-4aa2-7031-973f-dea8ae70bed7" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019c392d-4aa2-7c9b-8f97-de39dc2c2785" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019c392d-4aa2-7c9b-8f97-de39dc2c2785_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019c392d-4aa2-7c9b-8f97-de39dc2c2785" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019c392d-4aa2-7c9b-8f97-de39dc2c2785_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019c392d-4aa2-7f80-b8c1-fb3da1d0d91c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019c392d-4aa2-7c9b-8f97-de39dc2c2785" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019c392d-4aa2-7f80-b8c1-fb3da1d0d91c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_019c392d-4aa2-7b91-9b37-f4a0a6941fc0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019c392d-4aa2-7f80-b8c1-fb3da1d0d91c" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_019c392d-4aa2-7b91-9b37-f4a0a6941fc0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_019c392d-4aa2-7f4a-a22e-90e7756e5ed4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019c392d-4aa2-7f80-b8c1-fb3da1d0d91c" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_019c392d-4aa2-7f4a-a22e-90e7756e5ed4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_019c392d-4aa2-7857-96fb-2cd888351e42" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019c392d-4aa2-7f80-b8c1-fb3da1d0d91c" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_019c392d-4aa2-7857-96fb-2cd888351e42" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019c392d-4aa2-7c90-a5ac-11c0f5f6ffbb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019c392d-4aa2-7031-973f-dea8ae70bed7" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019c392d-4aa2-7c90-a5ac-11c0f5f6ffbb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019c392d-4aa2-7c90-a5ac-11c0f5f6ffbb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019c392d-4aa2-7c90-a5ac-11c0f5f6ffbb" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019c392d-4aa2-7c90-a5ac-11c0f5f6ffbb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019c392d-4aa2-7391-8522-5818d95ba4c7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019c392d-4aa2-7c90-a5ac-11c0f5f6ffbb" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019c392d-4aa2-7391-8522-5818d95ba4c7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_MarketableSecuritiesMember_019c392d-4aa2-77d5-a698-d92a79e3d43a" xlink:href="smci-20260331.xsd#smci_MarketableSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019c392d-4aa2-7391-8522-5818d95ba4c7" xlink:to="loc_smci_MarketableSecuritiesMember_019c392d-4aa2-77d5-a698-d92a79e3d43a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AuctionRateSecuritiesMember_019c392d-4aa2-72c7-8350-c0832eb2f147" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AuctionRateSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019c392d-4aa2-7391-8522-5818d95ba4c7" xlink:to="loc_us-gaap_AuctionRateSecuritiesMember_019c392d-4aa2-72c7-8350-c0832eb2f147" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019c392d-4aa2-75e0-9380-836b3cbecfed" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019c392d-4aa2-7031-973f-dea8ae70bed7" xlink:to="loc_us-gaap_DebtInstrumentAxis_019c392d-4aa2-75e0-9380-836b3cbecfed" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-75e0-9380-836b3cbecfed_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019c392d-4aa2-75e0-9380-836b3cbecfed" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-75e0-9380-836b3cbecfed_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-7c34-ad9b-8a6498e46a4f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019c392d-4aa2-75e0-9380-836b3cbecfed" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-7c34-ad9b-8a6498e46a4f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_ConvertibleSeniorNotesDue2029Member_019c392d-4aa2-7061-8c73-89eda079e5f6" xlink:href="smci-20260331.xsd#smci_ConvertibleSeniorNotesDue2029Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-7c34-ad9b-8a6498e46a4f" xlink:to="loc_smci_ConvertibleSeniorNotesDue2029Member_019c392d-4aa2-7061-8c73-89eda079e5f6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_ConvertibleSeniorNotesDue2028Member_019c392d-4aa2-7ffa-8f35-48fa74bc376b" xlink:href="smci-20260331.xsd#smci_ConvertibleSeniorNotesDue2028Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-7c34-ad9b-8a6498e46a4f" xlink:to="loc_smci_ConvertibleSeniorNotesDue2028Member_019c392d-4aa2-7ffa-8f35-48fa74bc376b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_ConvertibleSeniorNotesDue2030Member_019c392d-4aa2-764e-a84c-533fcdb80488" xlink:href="smci-20260331.xsd#smci_ConvertibleSeniorNotesDue2030Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-7c34-ad9b-8a6498e46a4f" xlink:to="loc_smci_ConvertibleSeniorNotesDue2030Member_019c392d-4aa2-764e-a84c-533fcdb80488" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019c392d-4aa2-7f75-ab48-8be200bc5f4e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019c392d-4aa2-7031-973f-dea8ae70bed7" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019c392d-4aa2-7f75-ab48-8be200bc5f4e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019c392d-4aa2-7f75-ab48-8be200bc5f4e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019c392d-4aa2-7f75-ab48-8be200bc5f4e" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019c392d-4aa2-7f75-ab48-8be200bc5f4e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019c392d-4aa2-7655-a085-96e8a43f6966" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019c392d-4aa2-7f75-ab48-8be200bc5f4e" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019c392d-4aa2-7655-a085-96e8a43f6966" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleNotesPayableMember_019c392d-4aa2-7681-96f0-cdaca723097d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConvertibleNotesPayableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019c392d-4aa2-7655-a085-96e8a43f6966" xlink:to="loc_us-gaap_ConvertibleNotesPayableMember_019c392d-4aa2-7681-96f0-cdaca723097d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrealizedGainLossOnInvestments_019c392d-4aa2-7d0e-a01c-6392b7eba7fb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrealizedGainLossOnInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019c392d-4aa2-7171-bf7c-3e0dfc5843c4" xlink:to="loc_us-gaap_UnrealizedGainLossOnInvestments_019c392d-4aa2-7d0e-a01c-6392b7eba7fb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest_019c392d-4aa2-7396-bdd2-159fd2e3b697" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019c392d-4aa2-7171-bf7c-3e0dfc5843c4" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest_019c392d-4aa2-7396-bdd2-159fd2e3b697" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_019c392d-4aa2-7db9-b5ce-5cfed47de194" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentInterestRateEffectivePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019c392d-4aa2-7171-bf7c-3e0dfc5843c4" xlink:to="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_019c392d-4aa2-7db9-b5ce-5cfed47de194" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFairValue_019c392d-4aa2-77de-ad8a-fc3564c74585" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019c392d-4aa2-7171-bf7c-3e0dfc5843c4" xlink:to="loc_us-gaap_DebtInstrumentFairValue_019c392d-4aa2-77de-ad8a-fc3564c74585" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtFairValueDisclosures_019c392d-4aa2-71a2-add2-f67bab413c84" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConvertibleDebtFairValueDisclosures"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019c392d-4aa2-7171-bf7c-3e0dfc5843c4" xlink:to="loc_us-gaap_ConvertibleDebtFairValueDisclosures_019c392d-4aa2-71a2-add2-f67bab413c84" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.supermicro.com/role/NonmarketableEquitySecuritiesNarrativeDetails" xlink:type="simple" xlink:href="smci-20260331.xsd#NonmarketableEquitySecuritiesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.supermicro.com/role/NonmarketableEquitySecuritiesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesWithoutReadilyDeterminableFairValueLineItems_019c392d-4aa2-7e53-a774-37160e7a4cbb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesWithoutReadilyDeterminableFairValueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesWithoutReadilyDeterminableFairValueTable_019c392d-4aa2-78d1-941f-db3faca99b44" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesWithoutReadilyDeterminableFairValueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EquitySecuritiesWithoutReadilyDeterminableFairValueLineItems_019c392d-4aa2-7e53-a774-37160e7a4cbb" xlink:to="loc_us-gaap_EquitySecuritiesWithoutReadilyDeterminableFairValueTable_019c392d-4aa2-78d1-941f-db3faca99b44" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_019c392d-4aa2-70b3-9f84-9edfbbaf36fa" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_EquitySecuritiesWithoutReadilyDeterminableFairValueTable_019c392d-4aa2-78d1-941f-db3faca99b44" xlink:to="loc_srt_CounterpartyNameAxis_019c392d-4aa2-70b3-9f84-9edfbbaf36fa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019c392d-4aa2-70b3-9f84-9edfbbaf36fa_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_019c392d-4aa2-70b3-9f84-9edfbbaf36fa" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019c392d-4aa2-70b3-9f84-9edfbbaf36fa_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019c392d-4aa2-72a0-a81f-9fb298887dd3" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_019c392d-4aa2-70b3-9f84-9edfbbaf36fa" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019c392d-4aa2-72a0-a81f-9fb298887dd3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_SublessorMember_019c392d-4aa2-737e-aa02-6984b8467488" xlink:href="smci-20260331.xsd#smci_SublessorMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019c392d-4aa2-72a0-a81f-9fb298887dd3" xlink:to="loc_smci_SublessorMember_019c392d-4aa2-737e-aa02-6984b8467488" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesWithoutReadilyDeterminableFairValueAmount_019c392d-4aa2-7722-88b6-b62d154df76e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesWithoutReadilyDeterminableFairValueAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquitySecuritiesWithoutReadilyDeterminableFairValueLineItems_019c392d-4aa2-7e53-a774-37160e7a4cbb" xlink:to="loc_us-gaap_EquitySecuritiesWithoutReadilyDeterminableFairValueAmount_019c392d-4aa2-7722-88b6-b62d154df76e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesWithoutReadilyDeterminableFairValueImpairmentLossAnnualAmount_019c392d-4aa2-736a-9d32-8050579df575" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesWithoutReadilyDeterminableFairValueImpairmentLossAnnualAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquitySecuritiesWithoutReadilyDeterminableFairValueLineItems_019c392d-4aa2-7e53-a774-37160e7a4cbb" xlink:to="loc_us-gaap_EquitySecuritiesWithoutReadilyDeterminableFairValueImpairmentLossAnnualAmount_019c392d-4aa2-736a-9d32-8050579df575" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.supermicro.com/role/NetIncomeperCommonShareScheduleofComputationofBasicandDilutedNetIncomePerShareDetails" xlink:type="simple" xlink:href="smci-20260331.xsd#NetIncomeperCommonShareScheduleofComputationofBasicandDilutedNetIncomePerShareDetails"/>
  <link:definitionLink xlink:role="http://www.supermicro.com/role/NetIncomeperCommonShareScheduleofComputationofBasicandDilutedNetIncomePerShareDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_019c392d-4aa2-7375-8d00-7b77b9f74748" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_019c392d-4aa2-7324-9b02-c2c7ba9cfe04" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_019c392d-4aa2-7375-8d00-7b77b9f74748" xlink:to="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_019c392d-4aa2-7324-9b02-c2c7ba9cfe04" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_019c392d-4aa2-7112-b155-b596195ee4f8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_019c392d-4aa2-7324-9b02-c2c7ba9cfe04" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_019c392d-4aa2-7112-b155-b596195ee4f8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019c392d-4aa2-7112-b155-b596195ee4f8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_019c392d-4aa2-7112-b155-b596195ee4f8" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019c392d-4aa2-7112-b155-b596195ee4f8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019c392d-4aa2-70fc-a5c4-d31d975728c0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_019c392d-4aa2-7112-b155-b596195ee4f8" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019c392d-4aa2-70fc-a5c4-d31d975728c0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockCompensationPlanMember_019c392d-4aa2-76a6-9337-a3a46c37716b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockCompensationPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019c392d-4aa2-70fc-a5c4-d31d975728c0" xlink:to="loc_us-gaap_StockCompensationPlanMember_019c392d-4aa2-76a6-9337-a3a46c37716b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtMember_019c392d-4aa2-71db-acd2-e1dbaa8fc9e4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConvertibleDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019c392d-4aa2-70fc-a5c4-d31d975728c0" xlink:to="loc_us-gaap_ConvertibleDebtMember_019c392d-4aa2-71db-acd2-e1dbaa8fc9e4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_019c392d-4aa2-714e-b748-20d26f9e6f2a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_019c392d-4aa2-7375-8d00-7b77b9f74748" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_019c392d-4aa2-714e-b748-20d26f9e6f2a" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.supermicro.com/role/BalanceSheetComponentsScheduleofPropertyPlantandEquipmentNetDetails" xlink:type="simple" xlink:href="smci-20260331.xsd#BalanceSheetComponentsScheduleofPropertyPlantandEquipmentNetDetails"/>
  <link:definitionLink xlink:role="http://www.supermicro.com/role/BalanceSheetComponentsScheduleofPropertyPlantandEquipmentNetDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019c392d-4aa2-756d-affa-1a614b24c4d7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019c392d-4aa2-7c65-8bb7-47a8d6668c72" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019c392d-4aa2-756d-affa-1a614b24c4d7" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019c392d-4aa2-7c65-8bb7-47a8d6668c72" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019c392d-4aa2-70f4-a232-dc7c98f1f525" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019c392d-4aa2-7c65-8bb7-47a8d6668c72" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019c392d-4aa2-70f4-a232-dc7c98f1f525" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019c392d-4aa2-70f4-a232-dc7c98f1f525_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019c392d-4aa2-70f4-a232-dc7c98f1f525" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019c392d-4aa2-70f4-a232-dc7c98f1f525_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019c392d-4aa2-7a6b-b623-1a524a463e25" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019c392d-4aa2-70f4-a232-dc7c98f1f525" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019c392d-4aa2-7a6b-b623-1a524a463e25" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LandMember_019c392d-4aa2-7274-b3b5-17526c82da78" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LandMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019c392d-4aa2-7a6b-b623-1a524a463e25" xlink:to="loc_us-gaap_LandMember_019c392d-4aa2-7274-b3b5-17526c82da78" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BuildingMember_019c392d-4aa2-7ead-9153-34b033ccfd07" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BuildingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019c392d-4aa2-7a6b-b623-1a524a463e25" xlink:to="loc_us-gaap_BuildingMember_019c392d-4aa2-7ead-9153-34b033ccfd07" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MachineryAndEquipmentMember_019c392d-4aa2-7dcc-ac64-5ab6baec687c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MachineryAndEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019c392d-4aa2-7a6b-b623-1a524a463e25" xlink:to="loc_us-gaap_MachineryAndEquipmentMember_019c392d-4aa2-7dcc-ac64-5ab6baec687c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_BuildingAndLeaseholdImpovementsMember_019c392d-4aa2-7855-b58d-8c645cd37059" xlink:href="smci-20260331.xsd#smci_BuildingAndLeaseholdImpovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019c392d-4aa2-7a6b-b623-1a524a463e25" xlink:to="loc_smci_BuildingAndLeaseholdImpovementsMember_019c392d-4aa2-7855-b58d-8c645cd37059" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConstructionInProgressMember_019dd576-568e-701c-a69c-1fc58e79e9a2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConstructionInProgressMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019c392d-4aa2-7a6b-b623-1a524a463e25" xlink:to="loc_us-gaap_ConstructionInProgressMember_019dd576-568e-701c-a69c-1fc58e79e9a2" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FurnitureAndFixturesMember_019c392d-4aa2-7edc-8103-879cda8035e4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FurnitureAndFixturesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019c392d-4aa2-7a6b-b623-1a524a463e25" xlink:to="loc_us-gaap_FurnitureAndFixturesMember_019c392d-4aa2-7edc-8103-879cda8035e4" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SoftwareAndSoftwareDevelopmentCostsMember_019c392d-4aa2-7205-9cd6-064d6f53b8a2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SoftwareAndSoftwareDevelopmentCostsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019c392d-4aa2-7a6b-b623-1a524a463e25" xlink:to="loc_us-gaap_SoftwareAndSoftwareDevelopmentCostsMember_019c392d-4aa2-7205-9cd6-064d6f53b8a2" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_019c392d-4aa2-73db-b89d-38395009375f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019c392d-4aa2-756d-affa-1a614b24c4d7" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_019c392d-4aa2-73db-b89d-38395009375f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_019c392d-4aa2-7440-8704-89ebfe327142" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019c392d-4aa2-756d-affa-1a614b24c4d7" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_019c392d-4aa2-7440-8704-89ebfe327142" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_019c392d-4aa2-722c-ada4-6e8f65748838" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019c392d-4aa2-756d-affa-1a614b24c4d7" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_019c392d-4aa2-722c-ada4-6e8f65748838" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.supermicro.com/role/BalanceSheetComponentsScheduleofAccruedLiabilitiesDetails" xlink:type="simple" xlink:href="smci-20260331.xsd#BalanceSheetComponentsScheduleofAccruedLiabilitiesDetails"/>
  <link:definitionLink xlink:role="http://www.supermicro.com/role/BalanceSheetComponentsScheduleofAccruedLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtLineItems_019dce55-9638-7f9e-a175-b4d352b84d5e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermDebtLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShortTermDebtTable_019dce55-9638-7ef9-9f94-ba2f88478162" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShortTermDebtTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019dce55-9638-7f9e-a175-b4d352b84d5e" xlink:to="loc_us-gaap_ScheduleOfShortTermDebtTable_019dce55-9638-7ef9-9f94-ba2f88478162" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019dce55-9638-73fa-a00f-e06510b033f1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_019dce55-9638-7ef9-9f94-ba2f88478162" xlink:to="loc_us-gaap_DebtInstrumentAxis_019dce55-9638-73fa-a00f-e06510b033f1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019dce55-9638-73fa-a00f-e06510b033f1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019dce55-9638-73fa-a00f-e06510b033f1" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019dce55-9638-73fa-a00f-e06510b033f1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019dce55-9638-7881-82c6-7e644f4e482e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019dce55-9638-73fa-a00f-e06510b033f1" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019dce55-9638-7881-82c6-7e644f4e482e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_LineOfCreditAndTermLoanMember_019dce55-9638-78a2-954d-a75f3474aae9" xlink:href="smci-20260331.xsd#smci_LineOfCreditAndTermLoanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019dce55-9638-7881-82c6-7e644f4e482e" xlink:to="loc_smci_LineOfCreditAndTermLoanMember_019dce55-9638-78a2-954d-a75f3474aae9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleNotesPayableMember_019dce56-0386-727c-b049-ffcb4cedfb76" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConvertibleNotesPayableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019dce55-9638-7881-82c6-7e644f4e482e" xlink:to="loc_us-gaap_ConvertibleNotesPayableMember_019dce56-0386-727c-b049-ffcb4cedfb76" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_AccruedCustomerDepositsCurrent_019c392d-4aa2-7206-8c23-d04a039ed937" xlink:href="smci-20260331.xsd#smci_AccruedCustomerDepositsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019dce55-9638-7f9e-a175-b4d352b84d5e" xlink:to="loc_smci_AccruedCustomerDepositsCurrent_019c392d-4aa2-7206-8c23-d04a039ed937" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRefundLiabilityCurrent_019c392d-4aa2-7901-be22-a7e90d4ce12f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CustomerRefundLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019dce55-9638-7f9e-a175-b4d352b84d5e" xlink:to="loc_us-gaap_CustomerRefundLiabilityCurrent_019c392d-4aa2-7901-be22-a7e90d4ce12f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_019c392d-4aa2-79a1-adbb-6a24099a6c9b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019dce55-9638-7f9e-a175-b4d352b84d5e" xlink:to="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_019c392d-4aa2-79a1-adbb-6a24099a6c9b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_ImportTaxAndTariffLiabilitiesCurrent_019de2cf-b48c-740f-9202-c04ae78add19" xlink:href="smci-20260331.xsd#smci_ImportTaxAndTariffLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019dce55-9638-7f9e-a175-b4d352b84d5e" xlink:to="loc_smci_ImportTaxAndTariffLiabilitiesCurrent_019de2cf-b48c-740f-9202-c04ae78add19" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedMarketingCostsCurrent_019c392d-4aa2-791f-b351-91378bb2ca7a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccruedMarketingCostsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019dce55-9638-7f9e-a175-b4d352b84d5e" xlink:to="loc_us-gaap_AccruedMarketingCostsCurrent_019c392d-4aa2-791f-b351-91378bb2ca7a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxesPayableCurrent_019c392d-4aa2-75d2-8b4d-04d3e64004f7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TaxesPayableCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019dce55-9638-7f9e-a175-b4d352b84d5e" xlink:to="loc_us-gaap_TaxesPayableCurrent_019c392d-4aa2-75d2-8b4d-04d3e64004f7" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestPayableCurrent_019c392d-4aa2-72b9-95d6-cc7dc85ea129" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestPayableCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019dce55-9638-7f9e-a175-b4d352b84d5e" xlink:to="loc_us-gaap_InterestPayableCurrent_019c392d-4aa2-72b9-95d6-cc7dc85ea129" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_AccruedWithholdingTaxCurrent_019dce50-e940-7610-95f1-64dd2b3d6a34" xlink:href="smci-20260331.xsd#smci_AccruedWithholdingTaxCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019dce55-9638-7f9e-a175-b4d352b84d5e" xlink:to="loc_smci_AccruedWithholdingTaxCurrent_019dce50-e940-7610-95f1-64dd2b3d6a34" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_019c392d-4aa2-7992-9e3f-c117044f359f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019dce55-9638-7f9e-a175-b4d352b84d5e" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent_019c392d-4aa2-7992-9e3f-c117044f359f" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductWarrantyAccrualClassifiedCurrent_019c392d-4aa2-7353-a016-a8fe29e527b4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProductWarrantyAccrualClassifiedCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019dce55-9638-7f9e-a175-b4d352b84d5e" xlink:to="loc_us-gaap_ProductWarrantyAccrualClassifiedCurrent_019c392d-4aa2-7353-a016-a8fe29e527b4" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedProfessionalFeesCurrent_019c392d-4aa2-7d7c-82fd-e0bdd9aee9a2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccruedProfessionalFeesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019dce55-9638-7f9e-a175-b4d352b84d5e" xlink:to="loc_us-gaap_AccruedProfessionalFeesCurrent_019c392d-4aa2-7d7c-82fd-e0bdd9aee9a2" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAccruedLiabilitiesCurrent_019c392d-4aa2-7032-a870-be6dce41350a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAccruedLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019dce55-9638-7f9e-a175-b4d352b84d5e" xlink:to="loc_us-gaap_OtherAccruedLiabilitiesCurrent_019c392d-4aa2-7032-a870-be6dce41350a" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_019c392d-4aa2-7184-8a94-2d1d97711eb2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccruedLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019dce55-9638-7f9e-a175-b4d352b84d5e" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrent_019c392d-4aa2-7184-8a94-2d1d97711eb2" xlink:type="arc" order="12"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.supermicro.com/role/ReceivablesPurchaseAgreementNarrativeDetails" xlink:type="simple" xlink:href="smci-20260331.xsd#ReceivablesPurchaseAgreementNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.supermicro.com/role/ReceivablesPurchaseAgreementNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransferOfFinancialAssetsAccountedForAsSalesLineItems_019d68b1-191c-7d76-8135-e407053a9259" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransferOfFinancialAssetsAccountedForAsSalesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransferOfFinancialAssetsAccountedForAsSalesTable_019d68b1-191c-7aaf-a6ca-84fe56c1e76d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransferOfFinancialAssetsAccountedForAsSalesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_TransferOfFinancialAssetsAccountedForAsSalesLineItems_019d68b1-191c-7d76-8135-e407053a9259" xlink:to="loc_us-gaap_TransferOfFinancialAssetsAccountedForAsSalesTable_019d68b1-191c-7aaf-a6ca-84fe56c1e76d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019d68b1-191c-7176-8e44-00ee48d3d2fb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_TransferOfFinancialAssetsAccountedForAsSalesTable_019d68b1-191c-7aaf-a6ca-84fe56c1e76d" xlink:to="loc_us-gaap_DebtInstrumentAxis_019d68b1-191c-7176-8e44-00ee48d3d2fb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019d68b1-191c-7176-8e44-00ee48d3d2fb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019d68b1-191c-7176-8e44-00ee48d3d2fb" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019d68b1-191c-7176-8e44-00ee48d3d2fb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019d68b1-191c-780c-8cee-eff5001f89d5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019d68b1-191c-7176-8e44-00ee48d3d2fb" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019d68b1-191c-780c-8cee-eff5001f89d5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_ReceivablesPurchaseAgreementMember_019d68b1-191c-7f7a-aa74-0e3a9b324cdf" xlink:href="smci-20260331.xsd#smci_ReceivablesPurchaseAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019d68b1-191c-780c-8cee-eff5001f89d5" xlink:to="loc_smci_ReceivablesPurchaseAgreementMember_019d68b1-191c-7f7a-aa74-0e3a9b324cdf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019d68b1-191c-79d4-8d75-57477412c61e" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_TransferOfFinancialAssetsAccountedForAsSalesTable_019d68b1-191c-7aaf-a6ca-84fe56c1e76d" xlink:to="loc_srt_RangeAxis_019d68b1-191c-79d4-8d75-57477412c61e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019d68b1-191c-79d4-8d75-57477412c61e_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019d68b1-191c-79d4-8d75-57477412c61e" xlink:to="loc_srt_RangeMember_019d68b1-191c-79d4-8d75-57477412c61e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019d68b1-191c-7d74-8f23-cedfe72761ef" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019d68b1-191c-79d4-8d75-57477412c61e" xlink:to="loc_srt_RangeMember_019d68b1-191c-7d74-8f23-cedfe72761ef" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019d68b1-191c-77f7-85d4-c4806897833f" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019d68b1-191c-7d74-8f23-cedfe72761ef" xlink:to="loc_srt_MinimumMember_019d68b1-191c-77f7-85d4-c4806897833f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019d68b1-191c-72e0-8bd7-f1ebf03d1acf" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019d68b1-191c-7d74-8f23-cedfe72761ef" xlink:to="loc_srt_MaximumMember_019d68b1-191c-72e0-8bd7-f1ebf03d1acf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019d68b1-191c-7fec-ada6-9a4ebd5d643f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransferOfFinancialAssetsAccountedForAsSalesLineItems_019d68b1-191c-7d76-8135-e407053a9259" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019d68b1-191c-7fec-ada6-9a4ebd5d643f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_PurchaseReceivableDiscountPercentage_019d68b1-191c-75ea-a189-643b8fb38a8e" xlink:href="smci-20260331.xsd#smci_PurchaseReceivableDiscountPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransferOfFinancialAssetsAccountedForAsSalesLineItems_019d68b1-191c-7d76-8135-e407053a9259" xlink:to="loc_smci_PurchaseReceivableDiscountPercentage_019d68b1-191c-75ea-a189-643b8fb38a8e" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.supermicro.com/role/LinesofCreditRevolvingCreditFacilitiesandTermLoansScheduleofShorttermandLongtermDebtDetails" xlink:type="simple" xlink:href="smci-20260331.xsd#LinesofCreditRevolvingCreditFacilitiesandTermLoansScheduleofShorttermandLongtermDebtDetails"/>
  <link:definitionLink xlink:role="http://www.supermicro.com/role/LinesofCreditRevolvingCreditFacilitiesandTermLoansScheduleofShorttermandLongtermDebtDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtLineItems_019c392d-4aa2-786a-884a-3fe3656fd2e5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermDebtLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShortTermDebtTable_019c392d-4aa2-708b-b00a-6fea0bf9a712" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShortTermDebtTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019c392d-4aa2-786a-884a-3fe3656fd2e5" xlink:to="loc_us-gaap_ScheduleOfShortTermDebtTable_019c392d-4aa2-708b-b00a-6fea0bf9a712" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_LongTermAndShortTermDebtTypeAxis_019c392d-4aa2-7f7e-bc48-7645650edbe0" xlink:href="smci-20260331.xsd#smci_LongTermAndShortTermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_019c392d-4aa2-708b-b00a-6fea0bf9a712" xlink:to="loc_smci_LongTermAndShortTermDebtTypeAxis_019c392d-4aa2-7f7e-bc48-7645650edbe0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_LongTermAndShortTermDebtTypeDomain_019c392d-4aa2-7f7e-bc48-7645650edbe0_default" xlink:href="smci-20260331.xsd#smci_LongTermAndShortTermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_smci_LongTermAndShortTermDebtTypeAxis_019c392d-4aa2-7f7e-bc48-7645650edbe0" xlink:to="loc_smci_LongTermAndShortTermDebtTypeDomain_019c392d-4aa2-7f7e-bc48-7645650edbe0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_LongTermAndShortTermDebtTypeDomain_019c392d-4aa2-7541-9009-60239f52ce31" xlink:href="smci-20260331.xsd#smci_LongTermAndShortTermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_smci_LongTermAndShortTermDebtTypeAxis_019c392d-4aa2-7f7e-bc48-7645650edbe0" xlink:to="loc_smci_LongTermAndShortTermDebtTypeDomain_019c392d-4aa2-7541-9009-60239f52ce31" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_019c392d-4aa2-737c-8ef9-036711aef2b2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_smci_LongTermAndShortTermDebtTypeDomain_019c392d-4aa2-7541-9009-60239f52ce31" xlink:to="loc_us-gaap_LineOfCreditMember_019c392d-4aa2-737c-8ef9-036711aef2b2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_019c392d-4aa2-718c-ac34-435b9ef5308e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_019c392d-4aa2-708b-b00a-6fea0bf9a712" xlink:to="loc_us-gaap_CreditFacilityAxis_019c392d-4aa2-718c-ac34-435b9ef5308e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019c392d-4aa2-718c-ac34-435b9ef5308e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_019c392d-4aa2-718c-ac34-435b9ef5308e" xlink:to="loc_us-gaap_CreditFacilityDomain_019c392d-4aa2-718c-ac34-435b9ef5308e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019c392d-4aa2-7276-a71d-25bd83fea2de" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_019c392d-4aa2-718c-ac34-435b9ef5308e" xlink:to="loc_us-gaap_CreditFacilityDomain_019c392d-4aa2-7276-a71d-25bd83fea2de" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_019c392d-4aa2-7a51-a03c-4584276650e6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019c392d-4aa2-7276-a71d-25bd83fea2de" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_019c392d-4aa2-7a51-a03c-4584276650e6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredDebtMember_019c392d-4aa2-756c-b83c-a7bfe8bc28e8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019c392d-4aa2-7276-a71d-25bd83fea2de" xlink:to="loc_us-gaap_SecuredDebtMember_019c392d-4aa2-756c-b83c-a7bfe8bc28e8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019c392d-4aa2-7252-87eb-363b5c634c5f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_019c392d-4aa2-708b-b00a-6fea0bf9a712" xlink:to="loc_us-gaap_DebtInstrumentAxis_019c392d-4aa2-7252-87eb-363b5c634c5f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-7252-87eb-363b5c634c5f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019c392d-4aa2-7252-87eb-363b5c634c5f" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-7252-87eb-363b5c634c5f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-7307-8b1b-8b899aa95306" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019c392d-4aa2-7252-87eb-363b5c634c5f" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-7307-8b1b-8b899aa95306" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_CTBCCreditLinesMember_019c392d-4aa2-7c3f-8b76-353451ef9132" xlink:href="smci-20260331.xsd#smci_CTBCCreditLinesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-7307-8b1b-8b899aa95306" xlink:to="loc_smci_CTBCCreditLinesMember_019c392d-4aa2-7c3f-8b76-353451ef9132" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_ChangHwaBankCreditLinesMember_019dd57d-46cf-7a81-bf37-a6a7277be814" xlink:href="smci-20260331.xsd#smci_ChangHwaBankCreditLinesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-7307-8b1b-8b899aa95306" xlink:to="loc_smci_ChangHwaBankCreditLinesMember_019dd57d-46cf-7a81-bf37-a6a7277be814" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_E.SUNBankCreditLinesMember_019c392d-4aa2-7ee1-ac31-45015e0f26c8" xlink:href="smci-20260331.xsd#smci_E.SUNBankCreditLinesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-7307-8b1b-8b899aa95306" xlink:to="loc_smci_E.SUNBankCreditLinesMember_019c392d-4aa2-7ee1-ac31-45015e0f26c8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_MegaBankCreditLinesMember_019c392d-4aa2-7341-b64c-858f11eaef6b" xlink:href="smci-20260331.xsd#smci_MegaBankCreditLinesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-7307-8b1b-8b899aa95306" xlink:to="loc_smci_MegaBankCreditLinesMember_019c392d-4aa2-7341-b64c-858f11eaef6b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_FirstBankCreditLinesMember_019c392d-4aa2-7831-aa41-d27acac40743" xlink:href="smci-20260331.xsd#smci_FirstBankCreditLinesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-7307-8b1b-8b899aa95306" xlink:to="loc_smci_FirstBankCreditLinesMember_019c392d-4aa2-7831-aa41-d27acac40743" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_JPMorganRevolvingCreditFacilityMember_019d71f9-143c-7e5e-a50d-fc9481a8cb3e" xlink:href="smci-20260331.xsd#smci_JPMorganRevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-7307-8b1b-8b899aa95306" xlink:to="loc_smci_JPMorganRevolvingCreditFacilityMember_019d71f9-143c-7e5e-a50d-fc9481a8cb3e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_CTBCRevolvingCreditFacilitiesMember_019d71fa-2086-7835-be47-e18c090612c2" xlink:href="smci-20260331.xsd#smci_CTBCRevolvingCreditFacilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-7307-8b1b-8b899aa95306" xlink:to="loc_smci_CTBCRevolvingCreditFacilitiesMember_019d71fa-2086-7835-be47-e18c090612c2" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_ChangHwaBankTermLoanDueOctober152026Member_019c392d-4aa2-715d-a738-24fa03f5ea45" xlink:href="smci-20260331.xsd#smci_ChangHwaBankTermLoanDueOctober152026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-7307-8b1b-8b899aa95306" xlink:to="loc_smci_ChangHwaBankTermLoanDueOctober152026Member_019c392d-4aa2-715d-a738-24fa03f5ea45" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_CTBCBankTermLoanDue2030Member_019c392d-4aa2-7cf9-8680-0c7f8910946a" xlink:href="smci-20260331.xsd#smci_CTBCBankTermLoanDue2030Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-7307-8b1b-8b899aa95306" xlink:to="loc_smci_CTBCBankTermLoanDue2030Member_019c392d-4aa2-7cf9-8680-0c7f8910946a" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_CTBCTermLoanFacilityDueAugust152026Member_019c392d-4aa2-7966-8dc6-a70be689608f" xlink:href="smci-20260331.xsd#smci_CTBCTermLoanFacilityDueAugust152026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-7307-8b1b-8b899aa95306" xlink:to="loc_smci_CTBCTermLoanFacilityDueAugust152026Member_019c392d-4aa2-7966-8dc6-a70be689608f" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_E.SUNBankTermLoanFacilityDueSeptember152026Member_019c392d-4aa2-70ca-baed-24f87baf0983" xlink:href="smci-20260331.xsd#smci_E.SUNBankTermLoanFacilityDueSeptember152026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-7307-8b1b-8b899aa95306" xlink:to="loc_smci_E.SUNBankTermLoanFacilityDueSeptember152026Member_019c392d-4aa2-70ca-baed-24f87baf0983" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_E.SUNBankTermLoanFacilityDueAugust152027Member_019c392d-4aa2-74db-9aaa-e3e764038e8b" xlink:href="smci-20260331.xsd#smci_E.SUNBankTermLoanFacilityDueAugust152027Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-7307-8b1b-8b899aa95306" xlink:to="loc_smci_E.SUNBankTermLoanFacilityDueAugust152027Member_019c392d-4aa2-74db-9aaa-e3e764038e8b" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_MegaBankTermLoanFacilityDueOctober32026Member_019c392d-4aa2-74b5-8603-ff6ffca79157" xlink:href="smci-20260331.xsd#smci_MegaBankTermLoanFacilityDueOctober32026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-7307-8b1b-8b899aa95306" xlink:to="loc_smci_MegaBankTermLoanFacilityDueOctober32026Member_019c392d-4aa2-74b5-8603-ff6ffca79157" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019c392d-4aa2-7f25-a1a7-03c0652a98c7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_019c392d-4aa2-708b-b00a-6fea0bf9a712" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019c392d-4aa2-7f25-a1a7-03c0652a98c7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019c392d-4aa2-7f25-a1a7-03c0652a98c7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019c392d-4aa2-7f25-a1a7-03c0652a98c7" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019c392d-4aa2-7f25-a1a7-03c0652a98c7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019c392d-4aa2-7c43-a658-c759e03965fb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019c392d-4aa2-7f25-a1a7-03c0652a98c7" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019c392d-4aa2-7c43-a658-c759e03965fb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_TermLoanMember_019c392d-4aa2-7fdf-9e05-79954b2bac7b" xlink:href="smci-20260331.xsd#smci_TermLoanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019c392d-4aa2-7c43-a658-c759e03965fb" xlink:to="loc_smci_TermLoanMember_019c392d-4aa2-7fdf-9e05-79954b2bac7b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermBorrowings_019c392d-4aa2-72b9-9496-bc4fbba3b7e0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermBorrowings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019c392d-4aa2-786a-884a-3fe3656fd2e5" xlink:to="loc_us-gaap_ShortTermBorrowings_019c392d-4aa2-72b9-9496-bc4fbba3b7e0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_019c392d-4aa2-7827-ba0d-0c3718bfd5a3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019c392d-4aa2-786a-884a-3fe3656fd2e5" xlink:to="loc_us-gaap_LongTermDebt_019c392d-4aa2-7827-ba0d-0c3718bfd5a3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtLongtermAndShorttermCombinedAmount_019c392d-4aa2-71b9-8349-9f6040660f8d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtLongtermAndShorttermCombinedAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019c392d-4aa2-786a-884a-3fe3656fd2e5" xlink:to="loc_us-gaap_DebtLongtermAndShorttermCombinedAmount_019c392d-4aa2-71b9-8349-9f6040660f8d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_LineOfCreditAndTermLoansCurrentMaturities_019c392d-4aa2-716a-9853-783faa6c8d30" xlink:href="smci-20260331.xsd#smci_LineOfCreditAndTermLoansCurrentMaturities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019c392d-4aa2-786a-884a-3fe3656fd2e5" xlink:to="loc_smci_LineOfCreditAndTermLoansCurrentMaturities_019c392d-4aa2-716a-9853-783faa6c8d30" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_LineOfCreditAndTermLoansNoncurrentMaturities_019c392d-4aa2-784c-8007-9b56e4334801" xlink:href="smci-20260331.xsd#smci_LineOfCreditAndTermLoansNoncurrentMaturities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019c392d-4aa2-786a-884a-3fe3656fd2e5" xlink:to="loc_smci_LineOfCreditAndTermLoansNoncurrentMaturities_019c392d-4aa2-784c-8007-9b56e4334801" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.supermicro.com/role/LinesofCreditRevolvingCreditFacilitiesandTermLoansScheduleofAvailableBorrowingsandInterestRatesforShorttermandLongtermDebtDetails" xlink:type="simple" xlink:href="smci-20260331.xsd#LinesofCreditRevolvingCreditFacilitiesandTermLoansScheduleofAvailableBorrowingsandInterestRatesforShorttermandLongtermDebtDetails"/>
  <link:definitionLink xlink:role="http://www.supermicro.com/role/LinesofCreditRevolvingCreditFacilitiesandTermLoansScheduleofAvailableBorrowingsandInterestRatesforShorttermandLongtermDebtDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtLineItems_019c392d-4aa2-7ef0-a7d7-02dfba74149d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermDebtLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShortTermDebtTable_019c392d-4aa2-7a44-a25c-03b703924f08" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShortTermDebtTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019c392d-4aa2-7ef0-a7d7-02dfba74149d" xlink:to="loc_us-gaap_ScheduleOfShortTermDebtTable_019c392d-4aa2-7a44-a25c-03b703924f08" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_LongTermAndShortTermDebtTypeAxis_019c392d-4aa2-7990-b347-05ee837f5423" xlink:href="smci-20260331.xsd#smci_LongTermAndShortTermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_019c392d-4aa2-7a44-a25c-03b703924f08" xlink:to="loc_smci_LongTermAndShortTermDebtTypeAxis_019c392d-4aa2-7990-b347-05ee837f5423" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_LongTermAndShortTermDebtTypeDomain_019c392d-4aa2-7990-b347-05ee837f5423_default" xlink:href="smci-20260331.xsd#smci_LongTermAndShortTermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_smci_LongTermAndShortTermDebtTypeAxis_019c392d-4aa2-7990-b347-05ee837f5423" xlink:to="loc_smci_LongTermAndShortTermDebtTypeDomain_019c392d-4aa2-7990-b347-05ee837f5423_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_LongTermAndShortTermDebtTypeDomain_019c392d-4aa2-7f32-a599-3782bba4368c" xlink:href="smci-20260331.xsd#smci_LongTermAndShortTermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_smci_LongTermAndShortTermDebtTypeAxis_019c392d-4aa2-7990-b347-05ee837f5423" xlink:to="loc_smci_LongTermAndShortTermDebtTypeDomain_019c392d-4aa2-7f32-a599-3782bba4368c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_019c392d-4aa2-7245-955b-5a095a78f3a1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_smci_LongTermAndShortTermDebtTypeDomain_019c392d-4aa2-7f32-a599-3782bba4368c" xlink:to="loc_us-gaap_LineOfCreditMember_019c392d-4aa2-7245-955b-5a095a78f3a1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_019c392d-4aa2-7dbf-b694-06da9a25fdc3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_019c392d-4aa2-7a44-a25c-03b703924f08" xlink:to="loc_us-gaap_CreditFacilityAxis_019c392d-4aa2-7dbf-b694-06da9a25fdc3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019c392d-4aa2-7dbf-b694-06da9a25fdc3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_019c392d-4aa2-7dbf-b694-06da9a25fdc3" xlink:to="loc_us-gaap_CreditFacilityDomain_019c392d-4aa2-7dbf-b694-06da9a25fdc3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019c392d-4aa2-76b6-940b-10d27e606ac2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_019c392d-4aa2-7dbf-b694-06da9a25fdc3" xlink:to="loc_us-gaap_CreditFacilityDomain_019c392d-4aa2-76b6-940b-10d27e606ac2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_019c392d-4aa2-7970-8e72-59e247f471f5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019c392d-4aa2-76b6-940b-10d27e606ac2" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_019c392d-4aa2-7970-8e72-59e247f471f5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredDebtMember_019c392d-4aa2-7520-b358-728e432ff4e9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019c392d-4aa2-76b6-940b-10d27e606ac2" xlink:to="loc_us-gaap_SecuredDebtMember_019c392d-4aa2-7520-b358-728e432ff4e9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019c392d-4aa2-777e-9d64-6172c61e29f6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_019c392d-4aa2-7a44-a25c-03b703924f08" xlink:to="loc_us-gaap_DebtInstrumentAxis_019c392d-4aa2-777e-9d64-6172c61e29f6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-777e-9d64-6172c61e29f6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019c392d-4aa2-777e-9d64-6172c61e29f6" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-777e-9d64-6172c61e29f6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-76ab-af0f-b44746231fd7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019c392d-4aa2-777e-9d64-6172c61e29f6" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-76ab-af0f-b44746231fd7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_CTBCCreditLinesMember_019c392d-4aa2-7b51-8b56-8e5af183456e" xlink:href="smci-20260331.xsd#smci_CTBCCreditLinesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-76ab-af0f-b44746231fd7" xlink:to="loc_smci_CTBCCreditLinesMember_019c392d-4aa2-7b51-8b56-8e5af183456e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_ChangHwaBankCreditLinesMember_019c392d-4aa2-7c71-8615-a304834133a9" xlink:href="smci-20260331.xsd#smci_ChangHwaBankCreditLinesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-76ab-af0f-b44746231fd7" xlink:to="loc_smci_ChangHwaBankCreditLinesMember_019c392d-4aa2-7c71-8615-a304834133a9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_E.SUNBankCreditLinesMember_019c392d-4aa2-7340-9892-e07eaafb1a7e" xlink:href="smci-20260331.xsd#smci_E.SUNBankCreditLinesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-76ab-af0f-b44746231fd7" xlink:to="loc_smci_E.SUNBankCreditLinesMember_019c392d-4aa2-7340-9892-e07eaafb1a7e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_MegaBankCreditLinesMember_019c392d-4aa2-799a-abf5-36fe0ee2cc65" xlink:href="smci-20260331.xsd#smci_MegaBankCreditLinesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-76ab-af0f-b44746231fd7" xlink:to="loc_smci_MegaBankCreditLinesMember_019c392d-4aa2-799a-abf5-36fe0ee2cc65" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_FirstBankCreditLinesMember_019c392d-4aa2-7cc5-bed9-e82301b23293" xlink:href="smci-20260331.xsd#smci_FirstBankCreditLinesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-76ab-af0f-b44746231fd7" xlink:to="loc_smci_FirstBankCreditLinesMember_019c392d-4aa2-7cc5-bed9-e82301b23293" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_JPMorganRevolvingCreditFacilityMember_019c392d-4aa2-7311-90ec-9603d13edd8d" xlink:href="smci-20260331.xsd#smci_JPMorganRevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-76ab-af0f-b44746231fd7" xlink:to="loc_smci_JPMorganRevolvingCreditFacilityMember_019c392d-4aa2-7311-90ec-9603d13edd8d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_CTBCRevolvingCreditFacilitiesMember_019d71fd-d84a-7b81-a3dd-568b8ba1b4a9" xlink:href="smci-20260331.xsd#smci_CTBCRevolvingCreditFacilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-76ab-af0f-b44746231fd7" xlink:to="loc_smci_CTBCRevolvingCreditFacilitiesMember_019d71fd-d84a-7b81-a3dd-568b8ba1b4a9" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_ChangHwaBankTermLoanDueOctober152026Member_019c392d-4aa2-74c0-96f6-55253411427c" xlink:href="smci-20260331.xsd#smci_ChangHwaBankTermLoanDueOctober152026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-76ab-af0f-b44746231fd7" xlink:to="loc_smci_ChangHwaBankTermLoanDueOctober152026Member_019c392d-4aa2-74c0-96f6-55253411427c" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_CTBCBankTermLoanDue2030Member_019c392d-4aa2-70f9-8a39-41b2fee76f94" xlink:href="smci-20260331.xsd#smci_CTBCBankTermLoanDue2030Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-76ab-af0f-b44746231fd7" xlink:to="loc_smci_CTBCBankTermLoanDue2030Member_019c392d-4aa2-70f9-8a39-41b2fee76f94" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_CTBCTermLoanFacilityDueAugust152026Member_019c392d-4aa2-79a1-8f7c-f8a7f7a40225" xlink:href="smci-20260331.xsd#smci_CTBCTermLoanFacilityDueAugust152026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-76ab-af0f-b44746231fd7" xlink:to="loc_smci_CTBCTermLoanFacilityDueAugust152026Member_019c392d-4aa2-79a1-8f7c-f8a7f7a40225" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_E.SUNBankTermLoanFacilityDueSeptember152026Member_019c392d-4aa2-7bda-9345-0c92036e7abd" xlink:href="smci-20260331.xsd#smci_E.SUNBankTermLoanFacilityDueSeptember152026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-76ab-af0f-b44746231fd7" xlink:to="loc_smci_E.SUNBankTermLoanFacilityDueSeptember152026Member_019c392d-4aa2-7bda-9345-0c92036e7abd" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_E.SUNBankTermLoanFacilityDueAugust152027Member_019c392d-4aa2-795c-aded-47ccaaa55524" xlink:href="smci-20260331.xsd#smci_E.SUNBankTermLoanFacilityDueAugust152027Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-76ab-af0f-b44746231fd7" xlink:to="loc_smci_E.SUNBankTermLoanFacilityDueAugust152027Member_019c392d-4aa2-795c-aded-47ccaaa55524" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_MegaBankTermLoanFacilityDueOctober32026Member_019c392d-4aa2-720c-a6e7-fffd60656add" xlink:href="smci-20260331.xsd#smci_MegaBankTermLoanFacilityDueOctober32026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-76ab-af0f-b44746231fd7" xlink:to="loc_smci_MegaBankTermLoanFacilityDueOctober32026Member_019c392d-4aa2-720c-a6e7-fffd60656add" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019c392d-4aa2-7ef1-85a1-3b2a821cd147" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_019c392d-4aa2-7a44-a25c-03b703924f08" xlink:to="loc_srt_RangeAxis_019c392d-4aa2-7ef1-85a1-3b2a821cd147" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019c392d-4aa2-7ef1-85a1-3b2a821cd147_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019c392d-4aa2-7ef1-85a1-3b2a821cd147" xlink:to="loc_srt_RangeMember_019c392d-4aa2-7ef1-85a1-3b2a821cd147_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019c392d-4aa2-7876-a55d-f0726a1f8bde" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019c392d-4aa2-7ef1-85a1-3b2a821cd147" xlink:to="loc_srt_RangeMember_019c392d-4aa2-7876-a55d-f0726a1f8bde" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019c392d-4aa2-7cca-b1be-67c492f06bda" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019c392d-4aa2-7876-a55d-f0726a1f8bde" xlink:to="loc_srt_MinimumMember_019c392d-4aa2-7cca-b1be-67c492f06bda" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019c392d-4aa2-7c14-9e98-4b69a64679a8" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019c392d-4aa2-7876-a55d-f0726a1f8bde" xlink:to="loc_srt_MaximumMember_019c392d-4aa2-7c14-9e98-4b69a64679a8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019c392d-4aa2-7000-8a02-0481cccdf645" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_019c392d-4aa2-7a44-a25c-03b703924f08" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019c392d-4aa2-7000-8a02-0481cccdf645" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019c392d-4aa2-7000-8a02-0481cccdf645_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019c392d-4aa2-7000-8a02-0481cccdf645" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019c392d-4aa2-7000-8a02-0481cccdf645_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019c392d-4aa2-7c8c-93b6-f374318980f5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019c392d-4aa2-7000-8a02-0481cccdf645" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019c392d-4aa2-7c8c-93b6-f374318980f5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_TermLoanMember_019c392d-4aa2-765e-9cd7-3a61ded79ca8" xlink:href="smci-20260331.xsd#smci_TermLoanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019c392d-4aa2-7c8c-93b6-f374318980f5" xlink:to="loc_smci_TermLoanMember_019c392d-4aa2-765e-9cd7-3a61ded79ca8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_019c392d-4aa2-7c32-b065-fb663cc1ca7d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019c392d-4aa2-7ef0-a7d7-02dfba74149d" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_019c392d-4aa2-7c32-b065-fb663cc1ca7d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_019c392d-4aa2-7804-8d77-a21a136f16a6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentInterestRateEffectivePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019c392d-4aa2-7ef0-a7d7-02dfba74149d" xlink:to="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_019c392d-4aa2-7804-8d77-a21a136f16a6" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.supermicro.com/role/LinesofCreditRevolvingCreditFacilitiesandTermLoansCTBCBankCreditLinesMegaBankCreditFacilitiesandFirstBankDetails" xlink:type="simple" xlink:href="smci-20260331.xsd#LinesofCreditRevolvingCreditFacilitiesandTermLoansCTBCBankCreditLinesMegaBankCreditFacilitiesandFirstBankDetails"/>
  <link:definitionLink xlink:role="http://www.supermicro.com/role/LinesofCreditRevolvingCreditFacilitiesandTermLoansCTBCBankCreditLinesMegaBankCreditFacilitiesandFirstBankDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtLineItems_019daf41-574f-7057-8621-3fcf0869a882" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermDebtLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShortTermDebtTable_019daf41-574f-7a04-8994-980b323370c0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShortTermDebtTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019daf41-574f-7057-8621-3fcf0869a882" xlink:to="loc_us-gaap_ScheduleOfShortTermDebtTable_019daf41-574f-7a04-8994-980b323370c0" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019daf41-574f-7799-9044-6b4db2510138" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_019daf41-574f-7a04-8994-980b323370c0" xlink:to="loc_us-gaap_DebtInstrumentAxis_019daf41-574f-7799-9044-6b4db2510138" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019daf41-574f-7799-9044-6b4db2510138_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019daf41-574f-7799-9044-6b4db2510138" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019daf41-574f-7799-9044-6b4db2510138_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019daf41-574f-7be8-a933-6654377959be" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019daf41-574f-7799-9044-6b4db2510138" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019daf41-574f-7be8-a933-6654377959be" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_CTBCBankCreditLinesMember_019dce98-8864-72c0-a157-b56a73c455a2" xlink:href="smci-20260331.xsd#smci_CTBCBankCreditLinesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019daf41-574f-7be8-a933-6654377959be" xlink:to="loc_smci_CTBCBankCreditLinesMember_019dce98-8864-72c0-a157-b56a73c455a2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_MegaBankCreditFacilitiesMember_019dce97-5dac-7acf-91b2-f38a7a244131" xlink:href="smci-20260331.xsd#smci_MegaBankCreditFacilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019daf41-574f-7be8-a933-6654377959be" xlink:to="loc_smci_MegaBankCreditFacilitiesMember_019dce97-5dac-7acf-91b2-f38a7a244131" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_FirstBankCreditLinesForeignCurrencyWorkingCapitalLoanMember_019dcec7-875e-7427-b1b9-bb0803a68f33" xlink:href="smci-20260331.xsd#smci_FirstBankCreditLinesForeignCurrencyWorkingCapitalLoanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019daf41-574f-7be8-a933-6654377959be" xlink:to="loc_smci_FirstBankCreditLinesForeignCurrencyWorkingCapitalLoanMember_019dcec7-875e-7427-b1b9-bb0803a68f33" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityAxis_019daf41-574f-7844-86c3-e24400e4005b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_019daf41-574f-7a04-8994-980b323370c0" xlink:to="loc_us-gaap_LineOfCreditFacilityAxis_019daf41-574f-7844-86c3-e24400e4005b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityLenderDomain_019daf41-574f-7844-86c3-e24400e4005b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityLenderDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LineOfCreditFacilityAxis_019daf41-574f-7844-86c3-e24400e4005b" xlink:to="loc_us-gaap_LineOfCreditFacilityLenderDomain_019daf41-574f-7844-86c3-e24400e4005b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityLenderDomain_019daf41-574f-75eb-afca-5c92e1168c7a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityLenderDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LineOfCreditFacilityAxis_019daf41-574f-7844-86c3-e24400e4005b" xlink:to="loc_us-gaap_LineOfCreditFacilityLenderDomain_019daf41-574f-75eb-afca-5c92e1168c7a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_CTBCBankMember_019dce98-4f56-7f53-8ccb-3b243cb59d54" xlink:href="smci-20260331.xsd#smci_CTBCBankMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLenderDomain_019daf41-574f-75eb-afca-5c92e1168c7a" xlink:to="loc_smci_CTBCBankMember_019dce98-4f56-7f53-8ccb-3b243cb59d54" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_MegaBankMember_019dce97-da90-709c-8de5-84ef9d774629" xlink:href="smci-20260331.xsd#smci_MegaBankMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLenderDomain_019daf41-574f-75eb-afca-5c92e1168c7a" xlink:to="loc_smci_MegaBankMember_019dce97-da90-709c-8de5-84ef9d774629" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_FirstBankMember_019dcec7-875e-7bf3-8249-fcc2e0d42123" xlink:href="smci-20260331.xsd#smci_FirstBankMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLenderDomain_019daf41-574f-75eb-afca-5c92e1168c7a" xlink:to="loc_smci_FirstBankMember_019dcec7-875e-7bf3-8249-fcc2e0d42123" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtTypeAxis_019daf41-574f-7ddb-81f9-9b90cea469c6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_019daf41-574f-7a04-8994-980b323370c0" xlink:to="loc_us-gaap_ShortTermDebtTypeAxis_019daf41-574f-7ddb-81f9-9b90cea469c6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtTypeDomain_019daf41-574f-7ddb-81f9-9b90cea469c6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ShortTermDebtTypeAxis_019daf41-574f-7ddb-81f9-9b90cea469c6" xlink:to="loc_us-gaap_ShortTermDebtTypeDomain_019daf41-574f-7ddb-81f9-9b90cea469c6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtTypeDomain_019daf41-574f-7ca4-9875-18bb180db9fe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ShortTermDebtTypeAxis_019daf41-574f-7ddb-81f9-9b90cea469c6" xlink:to="loc_us-gaap_ShortTermDebtTypeDomain_019daf41-574f-7ca4-9875-18bb180db9fe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_019daf41-574f-780e-8283-2aa76befbbc9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtTypeDomain_019daf41-574f-7ca4-9875-18bb180db9fe" xlink:to="loc_us-gaap_LineOfCreditMember_019daf41-574f-780e-8283-2aa76befbbc9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_019daf41-574f-70a1-bbbc-bb2a79c80774" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_019daf41-574f-7a04-8994-980b323370c0" xlink:to="loc_us-gaap_CreditFacilityAxis_019daf41-574f-70a1-bbbc-bb2a79c80774" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019daf41-574f-70a1-bbbc-bb2a79c80774_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_019daf41-574f-70a1-bbbc-bb2a79c80774" xlink:to="loc_us-gaap_CreditFacilityDomain_019daf41-574f-70a1-bbbc-bb2a79c80774_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019daf41-574f-7a51-bed2-c099d05f4700" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_019daf41-574f-70a1-bbbc-bb2a79c80774" xlink:to="loc_us-gaap_CreditFacilityDomain_019daf41-574f-7a51-bed2-c099d05f4700" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_019daf47-499d-7164-b329-98c1f3ccec47" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019daf41-574f-7a51-bed2-c099d05f4700" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_019daf47-499d-7164-b329-98c1f3ccec47" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019dd583-66a8-7bf7-a913-5766e3b8e4b8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_019daf41-574f-7a04-8994-980b323370c0" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019dd583-66a8-7bf7-a913-5766e3b8e4b8" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019dd583-66a8-7bf7-a913-5766e3b8e4b8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019dd583-66a8-7bf7-a913-5766e3b8e4b8" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019dd583-66a8-7bf7-a913-5766e3b8e4b8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019dd583-66a8-7967-85b5-c3715d1cdd37" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019dd583-66a8-7bf7-a913-5766e3b8e4b8" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019dd583-66a8-7967-85b5-c3715d1cdd37" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_019dd583-831f-7b2d-9b50-3ef36390b115" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019dd583-66a8-7967-85b5-c3715d1cdd37" xlink:to="loc_us-gaap_LineOfCreditMember_019dd583-831f-7b2d-9b50-3ef36390b115" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCredit_019daf41-574f-7ff9-8e9c-5b4ebb160080" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019daf41-574f-7057-8621-3fcf0869a882" xlink:to="loc_us-gaap_LineOfCredit_019daf41-574f-7ff9-8e9c-5b4ebb160080" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019daf41-574f-7650-93b5-0ed49ff21f37" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019daf41-574f-7057-8621-3fcf0869a882" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019daf41-574f-7650-93b5-0ed49ff21f37" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.supermicro.com/role/LinesofCreditRevolvingCreditFacilitiesandTermLoansJPMorganRevolvingCreditFacilityDetails" xlink:type="simple" xlink:href="smci-20260331.xsd#LinesofCreditRevolvingCreditFacilitiesandTermLoansJPMorganRevolvingCreditFacilityDetails"/>
  <link:definitionLink xlink:role="http://www.supermicro.com/role/LinesofCreditRevolvingCreditFacilitiesandTermLoansJPMorganRevolvingCreditFacilityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtLineItems_019daf3d-c31f-7506-91a6-f48f1924c3d3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermDebtLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShortTermDebtTable_019daf3d-c31f-7305-b3e5-aa6e7a99e32a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShortTermDebtTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019daf3d-c31f-7506-91a6-f48f1924c3d3" xlink:to="loc_us-gaap_ScheduleOfShortTermDebtTable_019daf3d-c31f-7305-b3e5-aa6e7a99e32a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_019daf3d-c31f-7db3-a706-6ef8b3e2929a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_019daf3d-c31f-7305-b3e5-aa6e7a99e32a" xlink:to="loc_us-gaap_CreditFacilityAxis_019daf3d-c31f-7db3-a706-6ef8b3e2929a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019daf3d-c31f-7db3-a706-6ef8b3e2929a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_019daf3d-c31f-7db3-a706-6ef8b3e2929a" xlink:to="loc_us-gaap_CreditFacilityDomain_019daf3d-c31f-7db3-a706-6ef8b3e2929a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019daf3d-c31f-7fba-9a14-8715fee5bf82" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_019daf3d-c31f-7db3-a706-6ef8b3e2929a" xlink:to="loc_us-gaap_CreditFacilityDomain_019daf3d-c31f-7fba-9a14-8715fee5bf82" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_019daf3d-c31f-78e3-ae1c-f8fd93d75e9a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019daf3d-c31f-7fba-9a14-8715fee5bf82" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_019daf3d-c31f-78e3-ae1c-f8fd93d75e9a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LetterOfCreditMember_019daf3d-c31f-725c-878e-7c770cb84733" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LetterOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019daf3d-c31f-7fba-9a14-8715fee5bf82" xlink:to="loc_us-gaap_LetterOfCreditMember_019daf3d-c31f-725c-878e-7c770cb84733" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_SameDayBorrowingSubLimitMember_019daf3d-c31f-7d5c-ba5e-3bb5e9820bdf" xlink:href="smci-20260331.xsd#smci_SameDayBorrowingSubLimitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019daf3d-c31f-7fba-9a14-8715fee5bf82" xlink:to="loc_smci_SameDayBorrowingSubLimitMember_019daf3d-c31f-7d5c-ba5e-3bb5e9820bdf" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019daf3d-c31f-7bfe-a1fe-815506afc10c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_019daf3d-c31f-7305-b3e5-aa6e7a99e32a" xlink:to="loc_us-gaap_DebtInstrumentAxis_019daf3d-c31f-7bfe-a1fe-815506afc10c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019daf3d-c31f-7bfe-a1fe-815506afc10c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019daf3d-c31f-7bfe-a1fe-815506afc10c" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019daf3d-c31f-7bfe-a1fe-815506afc10c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019daf3d-c31f-735c-b7e1-6c5e0c095ff4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019daf3d-c31f-7bfe-a1fe-815506afc10c" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019daf3d-c31f-735c-b7e1-6c5e0c095ff4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_JPMorganChaseBankCreditFacilityMember_019daf3d-c31f-785a-a45d-62061a9cbb4d" xlink:href="smci-20260331.xsd#smci_JPMorganChaseBankCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019daf3d-c31f-735c-b7e1-6c5e0c095ff4" xlink:to="loc_smci_JPMorganChaseBankCreditFacilityMember_019daf3d-c31f-785a-a45d-62061a9cbb4d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019daf3d-c31f-7667-8b40-cef72e873fbc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_019daf3d-c31f-7305-b3e5-aa6e7a99e32a" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019daf3d-c31f-7667-8b40-cef72e873fbc" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019daf3d-c31f-7667-8b40-cef72e873fbc_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019daf3d-c31f-7667-8b40-cef72e873fbc" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019daf3d-c31f-7667-8b40-cef72e873fbc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019daf3d-c31f-701e-a033-cab76419bcc3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019daf3d-c31f-7667-8b40-cef72e873fbc" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019daf3d-c31f-701e-a033-cab76419bcc3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_019daf3d-c31f-7c74-8c09-01dd42e3122b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019daf3d-c31f-701e-a033-cab76419bcc3" xlink:to="loc_us-gaap_LineOfCreditMember_019daf3d-c31f-7c74-8c09-01dd42e3122b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_TermLoanMember_019daf3d-c31f-7be2-8845-82e31c816df2" xlink:href="smci-20260331.xsd#smci_TermLoanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019daf3d-c31f-701e-a033-cab76419bcc3" xlink:to="loc_smci_TermLoanMember_019daf3d-c31f-7be2-8845-82e31c816df2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_ABRLoansMember_019daf3d-c31f-7f27-b732-8eb20d93fcd5" xlink:href="smci-20260331.xsd#smci_ABRLoansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019daf3d-c31f-701e-a033-cab76419bcc3" xlink:to="loc_smci_ABRLoansMember_019daf3d-c31f-7f27-b732-8eb20d93fcd5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019daf3d-c31f-7adc-9371-2c65dec1a12c" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_019daf3d-c31f-7305-b3e5-aa6e7a99e32a" xlink:to="loc_srt_RangeAxis_019daf3d-c31f-7adc-9371-2c65dec1a12c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019daf3d-c31f-7adc-9371-2c65dec1a12c_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019daf3d-c31f-7adc-9371-2c65dec1a12c" xlink:to="loc_srt_RangeMember_019daf3d-c31f-7adc-9371-2c65dec1a12c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019daf3d-c31f-73a9-9d49-49948ecee197" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019daf3d-c31f-7adc-9371-2c65dec1a12c" xlink:to="loc_srt_RangeMember_019daf3d-c31f-73a9-9d49-49948ecee197" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019daf3d-c31f-7646-a571-86fca1cf0296" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019daf3d-c31f-73a9-9d49-49948ecee197" xlink:to="loc_srt_MinimumMember_019daf3d-c31f-7646-a571-86fca1cf0296" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019daf3d-c31f-7987-8142-c188e3bf1c6f" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019daf3d-c31f-73a9-9d49-49948ecee197" xlink:to="loc_srt_MaximumMember_019daf3d-c31f-7987-8142-c188e3bf1c6f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InternalCreditAssessmentAxis_019daf3d-c31f-7d1c-8fba-39cb22fba928" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InternalCreditAssessmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_019daf3d-c31f-7305-b3e5-aa6e7a99e32a" xlink:to="loc_us-gaap_InternalCreditAssessmentAxis_019daf3d-c31f-7d1c-8fba-39cb22fba928" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InternalCreditAssessmentDomain_019daf3d-c31f-7d1c-8fba-39cb22fba928_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InternalCreditAssessmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InternalCreditAssessmentAxis_019daf3d-c31f-7d1c-8fba-39cb22fba928" xlink:to="loc_us-gaap_InternalCreditAssessmentDomain_019daf3d-c31f-7d1c-8fba-39cb22fba928_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InternalCreditAssessmentDomain_019daf3d-c31f-7462-a801-97328cf6d0af" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InternalCreditAssessmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InternalCreditAssessmentAxis_019daf3d-c31f-7d1c-8fba-39cb22fba928" xlink:to="loc_us-gaap_InternalCreditAssessmentDomain_019daf3d-c31f-7462-a801-97328cf6d0af" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InternalNoninvestmentGradeMember_019daf3d-c31f-7877-8ad1-68114eed0a93" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InternalNoninvestmentGradeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InternalCreditAssessmentDomain_019daf3d-c31f-7462-a801-97328cf6d0af" xlink:to="loc_us-gaap_InternalNoninvestmentGradeMember_019daf3d-c31f-7877-8ad1-68114eed0a93" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InternalInvestmentGradeMember_019daf3d-c31f-73ac-a643-4971a3a42d30" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InternalInvestmentGradeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InternalCreditAssessmentDomain_019daf3d-c31f-7462-a801-97328cf6d0af" xlink:to="loc_us-gaap_InternalInvestmentGradeMember_019daf3d-c31f-73ac-a643-4971a3a42d30" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019daf3d-c31f-7150-90f4-1db0dfd6ff48" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019daf3d-c31f-7506-91a6-f48f1924c3d3" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019daf3d-c31f-7150-90f4-1db0dfd6ff48" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_LineOfCreditFacilityAccordionFeatureIncreaseLimit_019daf3d-c31f-7fdb-95a2-f475edf39b45" xlink:href="smci-20260331.xsd#smci_LineOfCreditFacilityAccordionFeatureIncreaseLimit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019daf3d-c31f-7506-91a6-f48f1924c3d3" xlink:to="loc_smci_LineOfCreditFacilityAccordionFeatureIncreaseLimit_019daf3d-c31f-7fdb-95a2-f475edf39b45" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFeeAmount_019daf3d-c31f-78b1-bd5c-76421eba5872" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentFeeAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019daf3d-c31f-7506-91a6-f48f1924c3d3" xlink:to="loc_us-gaap_DebtInstrumentFeeAmount_019daf3d-c31f-78b1-bd5c-76421eba5872" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCredit_019daf3d-c31f-792d-a87e-cc7add260e11" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019daf3d-c31f-7506-91a6-f48f1924c3d3" xlink:to="loc_us-gaap_LineOfCredit_019daf3d-c31f-792d-a87e-cc7add260e11" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_019daf3d-c31f-753a-970d-3b245052e72e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019daf3d-c31f-7506-91a6-f48f1924c3d3" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_019daf3d-c31f-753a-970d-3b245052e72e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_019daf3d-c31f-78ef-96c4-3f55bef5d9a4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019daf3d-c31f-7506-91a6-f48f1924c3d3" xlink:to="loc_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_019daf3d-c31f-78ef-96c4-3f55bef5d9a4" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_DebtInstrumentCovenantLeverageRatioMaximum_019daf3d-c31f-7f2d-80d6-ad261fb3317f" xlink:href="smci-20260331.xsd#smci_DebtInstrumentCovenantLeverageRatioMaximum"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019daf3d-c31f-7506-91a6-f48f1924c3d3" xlink:to="loc_smci_DebtInstrumentCovenantLeverageRatioMaximum_019daf3d-c31f-7f2d-80d6-ad261fb3317f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_DebtInstrumentCovenantLiquidityRatioMinimum_019daf3d-c31f-7e52-9938-fb0727720c38" xlink:href="smci-20260331.xsd#smci_DebtInstrumentCovenantLiquidityRatioMinimum"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019daf3d-c31f-7506-91a6-f48f1924c3d3" xlink:to="loc_smci_DebtInstrumentCovenantLiquidityRatioMinimum_019daf3d-c31f-7e52-9938-fb0727720c38" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_DebtInstrumentCovenantLiquidityRatioThereafter_019daf3d-c31f-763c-aca4-4679b6eef5f9" xlink:href="smci-20260331.xsd#smci_DebtInstrumentCovenantLiquidityRatioThereafter"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019daf3d-c31f-7506-91a6-f48f1924c3d3" xlink:to="loc_smci_DebtInstrumentCovenantLiquidityRatioThereafter_019daf3d-c31f-763c-aca4-4679b6eef5f9" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.supermicro.com/role/LinesofCreditRevolvingCreditFacilitiesandTermLoansCTBCRevolvingCreditFacilitiesDetails" xlink:type="simple" xlink:href="smci-20260331.xsd#LinesofCreditRevolvingCreditFacilitiesandTermLoansCTBCRevolvingCreditFacilitiesDetails"/>
  <link:definitionLink xlink:role="http://www.supermicro.com/role/LinesofCreditRevolvingCreditFacilitiesandTermLoansCTBCRevolvingCreditFacilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtLineItems_019c392d-4aa2-7b9a-ac39-9b1babad89e0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermDebtLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShortTermDebtTable_019c392d-4aa2-708e-a664-948e7d02dd0a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShortTermDebtTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019c392d-4aa2-7b9a-ac39-9b1babad89e0" xlink:to="loc_us-gaap_ScheduleOfShortTermDebtTable_019c392d-4aa2-708e-a664-948e7d02dd0a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_019c392d-4aa2-704b-8482-a5134e26dece" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_019c392d-4aa2-708e-a664-948e7d02dd0a" xlink:to="loc_us-gaap_CreditFacilityAxis_019c392d-4aa2-704b-8482-a5134e26dece" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019c392d-4aa2-704b-8482-a5134e26dece_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_019c392d-4aa2-704b-8482-a5134e26dece" xlink:to="loc_us-gaap_CreditFacilityDomain_019c392d-4aa2-704b-8482-a5134e26dece_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019c392d-4aa2-7e3c-b9a4-c3341ef0d5af" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_019c392d-4aa2-704b-8482-a5134e26dece" xlink:to="loc_us-gaap_CreditFacilityDomain_019c392d-4aa2-7e3c-b9a4-c3341ef0d5af" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_019c392d-4aa2-74a6-ae0a-725f273f96d7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019c392d-4aa2-7e3c-b9a4-c3341ef0d5af" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_019c392d-4aa2-74a6-ae0a-725f273f96d7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019c392d-4aa2-7380-ba07-7ff59569215b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_019c392d-4aa2-708e-a664-948e7d02dd0a" xlink:to="loc_us-gaap_DebtInstrumentAxis_019c392d-4aa2-7380-ba07-7ff59569215b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-7380-ba07-7ff59569215b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019c392d-4aa2-7380-ba07-7ff59569215b" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-7380-ba07-7ff59569215b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-75ff-ab86-1a975009894c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019c392d-4aa2-7380-ba07-7ff59569215b" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-75ff-ab86-1a975009894c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_CTBCCreditAgreementInitialTwoFacilitiesMember_019d7225-5020-7ff5-b23b-78f9ce899e0f" xlink:href="smci-20260331.xsd#smci_CTBCCreditAgreementInitialTwoFacilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-75ff-ab86-1a975009894c" xlink:to="loc_smci_CTBCCreditAgreementInitialTwoFacilitiesMember_019d7225-5020-7ff5-b23b-78f9ce899e0f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_CTBCRevolvingCreditFacilityMember_019d722f-aea5-7bc0-aab6-03ca6463bce0" xlink:href="smci-20260331.xsd#smci_CTBCRevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-75ff-ab86-1a975009894c" xlink:to="loc_smci_CTBCRevolvingCreditFacilityMember_019d722f-aea5-7bc0-aab6-03ca6463bce0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_CTBCA1RevolvingCreditFacilityMember_019d7228-3e78-7b94-a780-c4dfd66f0e46" xlink:href="smci-20260331.xsd#smci_CTBCA1RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_smci_CTBCRevolvingCreditFacilityMember_019d722f-aea5-7bc0-aab6-03ca6463bce0" xlink:to="loc_smci_CTBCA1RevolvingCreditFacilityMember_019d7228-3e78-7b94-a780-c4dfd66f0e46" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_CTBCA2RevolvingCreditFacilityMember_019d7227-45c6-7c87-a50e-8d0b255de449" xlink:href="smci-20260331.xsd#smci_CTBCA2RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_smci_CTBCRevolvingCreditFacilityMember_019d722f-aea5-7bc0-aab6-03ca6463bce0" xlink:to="loc_smci_CTBCA2RevolvingCreditFacilityMember_019d7227-45c6-7c87-a50e-8d0b255de449" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_CTBCRevolvingCreditFacilitiesWithAccordionFeatureMember_019daee7-c4a2-79b9-981f-45f2af680868" xlink:href="smci-20260331.xsd#smci_CTBCRevolvingCreditFacilitiesWithAccordionFeatureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-75ff-ab86-1a975009894c" xlink:to="loc_smci_CTBCRevolvingCreditFacilitiesWithAccordionFeatureMember_019daee7-c4a2-79b9-981f-45f2af680868" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019c392d-4aa2-7e45-957d-ae673d3ec383" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_019c392d-4aa2-708e-a664-948e7d02dd0a" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019c392d-4aa2-7e45-957d-ae673d3ec383" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019c392d-4aa2-7e45-957d-ae673d3ec383_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019c392d-4aa2-7e45-957d-ae673d3ec383" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019c392d-4aa2-7e45-957d-ae673d3ec383_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019c392d-4aa2-71e8-9afd-5bad5a199cb0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019c392d-4aa2-7e45-957d-ae673d3ec383" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019c392d-4aa2-71e8-9afd-5bad5a199cb0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_019c392d-4aa2-7212-98d2-06efc53a7699" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019c392d-4aa2-71e8-9afd-5bad5a199cb0" xlink:to="loc_us-gaap_LineOfCreditMember_019c392d-4aa2-7212-98d2-06efc53a7699" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019c392d-4aa2-74e6-ac7c-8b3a7ad98281" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_019c392d-4aa2-708e-a664-948e7d02dd0a" xlink:to="loc_srt_RangeAxis_019c392d-4aa2-74e6-ac7c-8b3a7ad98281" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019c392d-4aa2-74e6-ac7c-8b3a7ad98281_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019c392d-4aa2-74e6-ac7c-8b3a7ad98281" xlink:to="loc_srt_RangeMember_019c392d-4aa2-74e6-ac7c-8b3a7ad98281_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019c392d-4aa2-7bd8-a4d2-f090b511643f" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019c392d-4aa2-74e6-ac7c-8b3a7ad98281" xlink:to="loc_srt_RangeMember_019c392d-4aa2-7bd8-a4d2-f090b511643f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019c392d-4aa2-711c-9e0d-5b473e22e453" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019c392d-4aa2-7bd8-a4d2-f090b511643f" xlink:to="loc_srt_MinimumMember_019c392d-4aa2-711c-9e0d-5b473e22e453" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019c392d-4aa2-79fb-9afc-2dda12af1d1c" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019c392d-4aa2-7bd8-a4d2-f090b511643f" xlink:to="loc_srt_MaximumMember_019c392d-4aa2-79fb-9afc-2dda12af1d1c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_NumberOfRevolvingCreditFacilities_019d7225-a0a3-7478-af6b-25f12104ddae" xlink:href="smci-20260331.xsd#smci_NumberOfRevolvingCreditFacilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019c392d-4aa2-7b9a-ac39-9b1babad89e0" xlink:to="loc_smci_NumberOfRevolvingCreditFacilities_019d7225-a0a3-7478-af6b-25f12104ddae" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019c392d-4aa2-731c-ba7f-7e5acc244520" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019c392d-4aa2-7b9a-ac39-9b1babad89e0" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019c392d-4aa2-731c-ba7f-7e5acc244520" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_LineOfCreditFacilityMaximumBorrowingCapacityOptionSubjectToCertainConditions_019d7225-6455-7638-b8ab-0d33c2081bc6" xlink:href="smci-20260331.xsd#smci_LineOfCreditFacilityMaximumBorrowingCapacityOptionSubjectToCertainConditions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019c392d-4aa2-7b9a-ac39-9b1babad89e0" xlink:to="loc_smci_LineOfCreditFacilityMaximumBorrowingCapacityOptionSubjectToCertainConditions_019d7225-6455-7638-b8ab-0d33c2081bc6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_LineOfCreditFacilityAccordionFeatureIncreaseLimit_019dced2-9012-7872-a159-3e06330b7f9f" xlink:href="smci-20260331.xsd#smci_LineOfCreditFacilityAccordionFeatureIncreaseLimit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019c392d-4aa2-7b9a-ac39-9b1babad89e0" xlink:to="loc_smci_LineOfCreditFacilityAccordionFeatureIncreaseLimit_019dced2-9012-7872-a159-3e06330b7f9f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019daeeb-af89-7f3a-9d46-a33e3c3fdb3a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019c392d-4aa2-7b9a-ac39-9b1babad89e0" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019daeeb-af89-7f3a-9d46-a33e3c3fdb3a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_019c392d-4aa2-7b74-8c87-67ee8a4fe48e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019c392d-4aa2-7b9a-ac39-9b1babad89e0" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_019c392d-4aa2-7b74-8c87-67ee8a4fe48e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_LineOfCreditFacilityUsagePercentage_019d7259-8079-79a7-a9fc-5bddaa554f70" xlink:href="smci-20260331.xsd#smci_LineOfCreditFacilityUsagePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019c392d-4aa2-7b9a-ac39-9b1babad89e0" xlink:to="loc_smci_LineOfCreditFacilityUsagePercentage_019d7259-8079-79a7-a9fc-5bddaa554f70" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_019c392d-4aa2-7bc5-a8f0-1ada5ab43beb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019c392d-4aa2-7b9a-ac39-9b1babad89e0" xlink:to="loc_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_019c392d-4aa2-7bc5-a8f0-1ada5ab43beb" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_LineOfCreditFacilityMaturityExtensionFeePercentage_019d724d-5ecb-79c7-82dd-5f21a4f95219" xlink:href="smci-20260331.xsd#smci_LineOfCreditFacilityMaturityExtensionFeePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019c392d-4aa2-7b9a-ac39-9b1babad89e0" xlink:to="loc_smci_LineOfCreditFacilityMaturityExtensionFeePercentage_019d724d-5ecb-79c7-82dd-5f21a4f95219" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_LineOfCreditFacilityPrepaymentAndCancellationFeePercentage_019d7242-c9cb-7d86-a572-92496d0b8993" xlink:href="smci-20260331.xsd#smci_LineOfCreditFacilityPrepaymentAndCancellationFeePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019c392d-4aa2-7b9a-ac39-9b1babad89e0" xlink:to="loc_smci_LineOfCreditFacilityPrepaymentAndCancellationFeePercentage_019d7242-c9cb-7d86-a572-92496d0b8993" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFeeAmount_019df1de-e0c9-7cb5-8c50-014ec4e2dc5a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentFeeAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019c392d-4aa2-7b9a-ac39-9b1babad89e0" xlink:to="loc_us-gaap_DebtInstrumentFeeAmount_019df1de-e0c9-7cb5-8c50-014ec4e2dc5a" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCredit_019c392d-4aa2-7111-bc75-a4b70a36344f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019c392d-4aa2-7b9a-ac39-9b1babad89e0" xlink:to="loc_us-gaap_LineOfCredit_019c392d-4aa2-7111-bc75-a4b70a36344f" xlink:type="arc" order="11"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.supermicro.com/role/ConvertibleNotesScheduleofConvertibleDebtDetails" xlink:type="simple" xlink:href="smci-20260331.xsd#ConvertibleNotesScheduleofConvertibleDebtDetails"/>
  <link:definitionLink xlink:role="http://www.supermicro.com/role/ConvertibleNotesScheduleofConvertibleDebtDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019c392d-4aa2-7815-9ba3-be89535bb877" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_019c392d-4aa2-77ac-b1e5-9e0e9a3fa9e1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c392d-4aa2-7815-9ba3-be89535bb877" xlink:to="loc_us-gaap_DebtInstrumentTable_019c392d-4aa2-77ac-b1e5-9e0e9a3fa9e1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019c392d-4aa2-75dd-98a0-a6df57565409" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019c392d-4aa2-77ac-b1e5-9e0e9a3fa9e1" xlink:to="loc_us-gaap_DebtInstrumentAxis_019c392d-4aa2-75dd-98a0-a6df57565409" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-75dd-98a0-a6df57565409_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019c392d-4aa2-75dd-98a0-a6df57565409" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-75dd-98a0-a6df57565409_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-764c-a85d-0483e35ba541" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019c392d-4aa2-75dd-98a0-a6df57565409" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-764c-a85d-0483e35ba541" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_ConvertibleSeniorNotesDue2028Member_019c392d-4aa2-75fe-96df-3cbac2b7edfe" xlink:href="smci-20260331.xsd#smci_ConvertibleSeniorNotesDue2028Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-764c-a85d-0483e35ba541" xlink:to="loc_smci_ConvertibleSeniorNotesDue2028Member_019c392d-4aa2-75fe-96df-3cbac2b7edfe" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_ConvertibleSeniorNotesDue2029Member_019c392d-4aa2-7eaa-87c0-67fa4849072e" xlink:href="smci-20260331.xsd#smci_ConvertibleSeniorNotesDue2029Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-764c-a85d-0483e35ba541" xlink:to="loc_smci_ConvertibleSeniorNotesDue2029Member_019c392d-4aa2-7eaa-87c0-67fa4849072e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_ConvertibleSeniorNotesDue2030Member_019c392d-4aa2-76a1-9a43-704978dde8ff" xlink:href="smci-20260331.xsd#smci_ConvertibleSeniorNotesDue2030Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-764c-a85d-0483e35ba541" xlink:to="loc_smci_ConvertibleSeniorNotesDue2030Member_019c392d-4aa2-76a1-9a43-704978dde8ff" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019c392d-4aa2-7ecc-873c-8da1cbf11d69" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019c392d-4aa2-77ac-b1e5-9e0e9a3fa9e1" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019c392d-4aa2-7ecc-873c-8da1cbf11d69" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019c392d-4aa2-7ecc-873c-8da1cbf11d69_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019c392d-4aa2-7ecc-873c-8da1cbf11d69" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019c392d-4aa2-7ecc-873c-8da1cbf11d69_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019c392d-4aa2-77c4-bc25-b445ea50f60c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019c392d-4aa2-7ecc-873c-8da1cbf11d69" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019c392d-4aa2-77c4-bc25-b445ea50f60c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleNotesPayableMember_019c392d-4aa2-70de-9f86-ca8a1d5d87d2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConvertibleNotesPayableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019c392d-4aa2-77c4-bc25-b445ea50f60c" xlink:to="loc_us-gaap_ConvertibleNotesPayableMember_019c392d-4aa2-70de-9f86-ca8a1d5d87d2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_019c392d-4aa2-7037-97fe-502152159d29" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c392d-4aa2-7815-9ba3-be89535bb877" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_019c392d-4aa2-7037-97fe-502152159d29" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_019c392d-4aa2-780e-91c7-dd0f0e34573f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentInterestRateEffectivePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c392d-4aa2-7815-9ba3-be89535bb877" xlink:to="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_019c392d-4aa2-780e-91c7-dd0f0e34573f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleConversionPrice1_019c392d-4aa2-7762-b5b1-ad89b9e7a71f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentConvertibleConversionPrice1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c392d-4aa2-7815-9ba3-be89535bb877" xlink:to="loc_us-gaap_DebtInstrumentConvertibleConversionPrice1_019c392d-4aa2-7762-b5b1-ad89b9e7a71f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_019c392d-4aa2-7ec7-acfa-bc8c91b03bac" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c392d-4aa2-7815-9ba3-be89535bb877" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_019c392d-4aa2-7ec7-acfa-bc8c91b03bac" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateDuringPeriod_019c392d-4aa2-7c0a-b78d-032812c28977" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentInterestRateDuringPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c392d-4aa2-7815-9ba3-be89535bb877" xlink:to="loc_us-gaap_DebtInstrumentInterestRateDuringPeriod_019c392d-4aa2-7c0a-b78d-032812c28977" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.supermicro.com/role/ConvertibleNotesNarrativeDetails" xlink:type="simple" xlink:href="smci-20260331.xsd#ConvertibleNotesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.supermicro.com/role/ConvertibleNotesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019c392d-4aa2-70a5-abe2-3d3aee5d8c7f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_019c392d-4aa2-7f35-a85d-afa3b416ee22" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c392d-4aa2-70a5-abe2-3d3aee5d8c7f" xlink:to="loc_us-gaap_DebtInstrumentTable_019c392d-4aa2-7f35-a85d-afa3b416ee22" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019c392d-4aa2-778a-9a47-f3c0617242d5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019c392d-4aa2-7f35-a85d-afa3b416ee22" xlink:to="loc_us-gaap_DebtInstrumentAxis_019c392d-4aa2-778a-9a47-f3c0617242d5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-778a-9a47-f3c0617242d5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019c392d-4aa2-778a-9a47-f3c0617242d5" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-778a-9a47-f3c0617242d5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-79bf-8f1d-1a78c0a4cc2c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019c392d-4aa2-778a-9a47-f3c0617242d5" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-79bf-8f1d-1a78c0a4cc2c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_ConvertibleSeniorNotesDue2029Member_019c392d-4aa2-7829-b001-b5e9f439fcc4" xlink:href="smci-20260331.xsd#smci_ConvertibleSeniorNotesDue2029Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-79bf-8f1d-1a78c0a4cc2c" xlink:to="loc_smci_ConvertibleSeniorNotesDue2029Member_019c392d-4aa2-7829-b001-b5e9f439fcc4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_ConvertibleSeniorNotesDue2028Member_019c392d-4aa2-7874-a8d5-c29615c01c6c" xlink:href="smci-20260331.xsd#smci_ConvertibleSeniorNotesDue2028Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-79bf-8f1d-1a78c0a4cc2c" xlink:to="loc_smci_ConvertibleSeniorNotesDue2028Member_019c392d-4aa2-7874-a8d5-c29615c01c6c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_ConvertibleSeniorNotesDue2030Member_019c392d-4aa2-7b03-bd89-e28b6eba9c77" xlink:href="smci-20260331.xsd#smci_ConvertibleSeniorNotesDue2030Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-79bf-8f1d-1a78c0a4cc2c" xlink:to="loc_smci_ConvertibleSeniorNotesDue2030Member_019c392d-4aa2-7b03-bd89-e28b6eba9c77" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_ConvertibleSeniorNotesDue2030OverallotmentOptionMember_019c392d-4aa2-7cc8-a255-a04bd842dd7a" xlink:href="smci-20260331.xsd#smci_ConvertibleSeniorNotesDue2030OverallotmentOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c392d-4aa2-79bf-8f1d-1a78c0a4cc2c" xlink:to="loc_smci_ConvertibleSeniorNotesDue2030OverallotmentOptionMember_019c392d-4aa2-7cc8-a255-a04bd842dd7a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019c392d-4aa2-70d7-a5f5-7474b34c811b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019c392d-4aa2-7f35-a85d-afa3b416ee22" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019c392d-4aa2-70d7-a5f5-7474b34c811b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019c392d-4aa2-70d7-a5f5-7474b34c811b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019c392d-4aa2-70d7-a5f5-7474b34c811b" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019c392d-4aa2-70d7-a5f5-7474b34c811b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019c392d-4aa2-74c9-9142-0543d33ed4a8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019c392d-4aa2-70d7-a5f5-7474b34c811b" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019c392d-4aa2-74c9-9142-0543d33ed4a8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleNotesPayableMember_019c392d-4aa2-750c-8a07-217268461286" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConvertibleNotesPayableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019c392d-4aa2-74c9-9142-0543d33ed4a8" xlink:to="loc_us-gaap_ConvertibleNotesPayableMember_019c392d-4aa2-750c-8a07-217268461286" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_DebtCovenantAxis_019c392d-4aa2-7989-872f-22e3e2d8222c" xlink:href="smci-20260331.xsd#smci_DebtCovenantAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019c392d-4aa2-7f35-a85d-afa3b416ee22" xlink:to="loc_smci_DebtCovenantAxis_019c392d-4aa2-7989-872f-22e3e2d8222c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_DebtCovenantDomain_019c392d-4aa2-7989-872f-22e3e2d8222c_default" xlink:href="smci-20260331.xsd#smci_DebtCovenantDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_smci_DebtCovenantAxis_019c392d-4aa2-7989-872f-22e3e2d8222c" xlink:to="loc_smci_DebtCovenantDomain_019c392d-4aa2-7989-872f-22e3e2d8222c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_DebtCovenantDomain_019c392d-4aa2-75e8-b29b-46576a98b9ad" xlink:href="smci-20260331.xsd#smci_DebtCovenantDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_smci_DebtCovenantAxis_019c392d-4aa2-7989-872f-22e3e2d8222c" xlink:to="loc_smci_DebtCovenantDomain_019c392d-4aa2-75e8-b29b-46576a98b9ad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_DebtCovenantRedemptionOptionOneMember_019c392d-4aa2-76dd-bea9-fc4dd9e5d361" xlink:href="smci-20260331.xsd#smci_DebtCovenantRedemptionOptionOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_smci_DebtCovenantDomain_019c392d-4aa2-75e8-b29b-46576a98b9ad" xlink:to="loc_smci_DebtCovenantRedemptionOptionOneMember_019c392d-4aa2-76dd-bea9-fc4dd9e5d361" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_DebtCovenantRedemptionOptionTwoMember_019c392d-4aa2-7b8a-b953-89229d7f32a1" xlink:href="smci-20260331.xsd#smci_DebtCovenantRedemptionOptionTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_smci_DebtCovenantDomain_019c392d-4aa2-75e8-b29b-46576a98b9ad" xlink:to="loc_smci_DebtCovenantRedemptionOptionTwoMember_019c392d-4aa2-7b8a-b953-89229d7f32a1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_019c392d-4aa2-7c2c-9a97-c7eb6366daa9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c392d-4aa2-70a5-abe2-3d3aee5d8c7f" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_019c392d-4aa2-7c2c-9a97-c7eb6366daa9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019c392d-4aa2-73bd-8914-3adf4afe1ef5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c392d-4aa2-70a5-abe2-3d3aee5d8c7f" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019c392d-4aa2-73bd-8914-3adf4afe1ef5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_019c392d-4aa2-74be-a12e-2cd03069d097" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentInterestRateEffectivePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c392d-4aa2-70a5-abe2-3d3aee5d8c7f" xlink:to="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_019c392d-4aa2-74be-a12e-2cd03069d097" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleConversionRatio1_019c392d-4aa2-7386-9f0d-99446d11b693" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentConvertibleConversionRatio1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c392d-4aa2-70a5-abe2-3d3aee5d8c7f" xlink:to="loc_us-gaap_DebtInstrumentConvertibleConversionRatio1_019c392d-4aa2-7386-9f0d-99446d11b693" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleConversionPrice1_019c392d-4aa2-7a5f-bc4d-9d3a6b11a918" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentConvertibleConversionPrice1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c392d-4aa2-70a5-abe2-3d3aee5d8c7f" xlink:to="loc_us-gaap_DebtInstrumentConvertibleConversionPrice1_019c392d-4aa2-7a5f-bc4d-9d3a6b11a918" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_019c392d-4aa2-75cc-a1b2-49a4feb85b92" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c392d-4aa2-70a5-abe2-3d3aee5d8c7f" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_019c392d-4aa2-75cc-a1b2-49a4feb85b92" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger_019c392d-4aa2-71e5-b34a-fe518fff1373" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c392d-4aa2-70a5-abe2-3d3aee5d8c7f" xlink:to="loc_us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger_019c392d-4aa2-71e5-b34a-fe518fff1373" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleThresholdTradingDays_019c392d-4aa2-7f71-b6d6-8bf1c2e811d5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentConvertibleThresholdTradingDays"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c392d-4aa2-70a5-abe2-3d3aee5d8c7f" xlink:to="loc_us-gaap_DebtInstrumentConvertibleThresholdTradingDays_019c392d-4aa2-7f71-b6d6-8bf1c2e811d5" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleThresholdConsecutiveTradingDays1_019c392d-4aa2-798e-a2b6-d722aa7f4d0e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentConvertibleThresholdConsecutiveTradingDays1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c392d-4aa2-70a5-abe2-3d3aee5d8c7f" xlink:to="loc_us-gaap_DebtInstrumentConvertibleThresholdConsecutiveTradingDays1_019c392d-4aa2-798e-a2b6-d722aa7f4d0e" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsNet_019c392d-4aa2-705f-b6db-a9efaaf434c1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredFinanceCostsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c392d-4aa2-70a5-abe2-3d3aee5d8c7f" xlink:to="loc_us-gaap_DeferredFinanceCostsNet_019c392d-4aa2-705f-b6db-a9efaaf434c1" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseDebt_019c392d-4aa2-7d65-921d-6bd837129a49" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c392d-4aa2-70a5-abe2-3d3aee5d8c7f" xlink:to="loc_us-gaap_InterestExpenseDebt_019c392d-4aa2-7d65-921d-6bd837129a49" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfFinancingCosts_019c392d-4aa2-740c-9969-80a0d80d1929" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AmortizationOfFinancingCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c392d-4aa2-70a5-abe2-3d3aee5d8c7f" xlink:to="loc_us-gaap_AmortizationOfFinancingCosts_019c392d-4aa2-740c-9969-80a0d80d1929" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_CappedCallInitialStrikePrice_019c392d-4aa2-7792-bc8a-dc7ac187721c" xlink:href="smci-20260331.xsd#smci_CappedCallInitialStrikePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c392d-4aa2-70a5-abe2-3d3aee5d8c7f" xlink:to="loc_smci_CappedCallInitialStrikePrice_019c392d-4aa2-7792-bc8a-dc7ac187721c" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OptionIndexedToIssuersEquityStrikePrice1_019c392d-4aa2-7554-b224-a38360add9ca" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OptionIndexedToIssuersEquityStrikePrice1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c392d-4aa2-70a5-abe2-3d3aee5d8c7f" xlink:to="loc_us-gaap_OptionIndexedToIssuersEquityStrikePrice1_019c392d-4aa2-7554-b224-a38360add9ca" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_DebtInstrumentCappedCallTransactionCapPricePerShare_019c392d-4aa2-7966-ad12-e3aec27b9b89" xlink:href="smci-20260331.xsd#smci_DebtInstrumentCappedCallTransactionCapPricePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c392d-4aa2-70a5-abe2-3d3aee5d8c7f" xlink:to="loc_smci_DebtInstrumentCappedCallTransactionCapPricePerShare_019c392d-4aa2-7966-ad12-e3aec27b9b89" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_DebtInstrumentCovenantPercentageOfPrincipalRepaidUponRequestFollowingFundamentalChange_019c392d-4aa2-7f03-94b0-ccd6d8e3228e" xlink:href="smci-20260331.xsd#smci_DebtInstrumentCovenantPercentageOfPrincipalRepaidUponRequestFollowingFundamentalChange"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c392d-4aa2-70a5-abe2-3d3aee5d8c7f" xlink:to="loc_smci_DebtInstrumentCovenantPercentageOfPrincipalRepaidUponRequestFollowingFundamentalChange_019c392d-4aa2-7f03-94b0-ccd6d8e3228e" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromConvertibleDebt_019c392d-4aa2-770b-a9ee-d0dfc0b1ac4d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromConvertibleDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c392d-4aa2-70a5-abe2-3d3aee5d8c7f" xlink:to="loc_us-gaap_ProceedsFromConvertibleDebt_019c392d-4aa2-770b-a9ee-d0dfc0b1ac4d" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_DebtInstrumentCappedCallInterestRatePercentage_019c392d-4aa2-7844-8d6e-a1688a18f1ec" xlink:href="smci-20260331.xsd#smci_DebtInstrumentCappedCallInterestRatePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c392d-4aa2-70a5-abe2-3d3aee5d8c7f" xlink:to="loc_smci_DebtInstrumentCappedCallInterestRatePercentage_019c392d-4aa2-7844-8d6e-a1688a18f1ec" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharePrice_019c392d-4aa2-7eb5-bd4e-5a6a29d96760" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c392d-4aa2-70a5-abe2-3d3aee5d8c7f" xlink:to="loc_us-gaap_SharePrice_019c392d-4aa2-7eb5-bd4e-5a6a29d96760" xlink:type="arc" order="18"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.supermicro.com/role/LeasesScheduleofLeaseCostsandCashFlowInformationDetails" xlink:type="simple" xlink:href="smci-20260331.xsd#LeasesScheduleofLeaseCostsandCashFlowInformationDetails"/>
  <link:definitionLink xlink:role="http://www.supermicro.com/role/LeasesScheduleofLeaseCostsandCashFlowInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4aa2-737f-b61b-874cff839de0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019c392d-4aa2-7c32-bc79-ca1bfd73025c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4aa2-737f-b61b-874cff839de0" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019c392d-4aa2-7c32-bc79-ca1bfd73025c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c392d-4aa2-7d15-a91d-af8843caaf74" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019c392d-4aa2-7c32-bc79-ca1bfd73025c" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c392d-4aa2-7d15-a91d-af8843caaf74" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019c392d-4aa2-7d15-a91d-af8843caaf74_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c392d-4aa2-7d15-a91d-af8843caaf74" xlink:to="loc_us-gaap_RelatedPartyDomain_019c392d-4aa2-7d15-a91d-af8843caaf74_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019c392d-4aa2-794a-b9e2-a5ab68bdebc9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c392d-4aa2-7d15-a91d-af8843caaf74" xlink:to="loc_us-gaap_RelatedPartyDomain_019c392d-4aa2-794a-b9e2-a5ab68bdebc9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_019c392d-4aa2-7e94-bf7f-186665302b05" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019c392d-4aa2-794a-b9e2-a5ab68bdebc9" xlink:to="loc_us-gaap_RelatedPartyMember_019c392d-4aa2-7e94-bf7f-186665302b05" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseCost_019c392d-4aa2-7d43-9ca2-f160ff3e79d6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4aa2-737f-b61b-874cff839de0" xlink:to="loc_us-gaap_OperatingLeaseCost_019c392d-4aa2-7d43-9ca2-f160ff3e79d6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeasePayments_019c392d-4aa2-754d-a03f-4c11e435e6a2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeasePayments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4aa2-737f-b61b-874cff839de0" xlink:to="loc_us-gaap_OperatingLeasePayments_019c392d-4aa2-754d-a03f-4c11e435e6a2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability_019c392d-4aa2-7b7a-b1a6-672be3e16ebd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4aa2-737f-b61b-874cff839de0" xlink:to="loc_us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability_019c392d-4aa2-7b7a-b1a6-672be3e16ebd" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.supermicro.com/role/LeasesNarrativeDetails" xlink:type="simple" xlink:href="smci-20260331.xsd#LeasesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.supermicro.com/role/LeasesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_019c392d-4aa2-76ba-b49f-5fc18ba05bd5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeLeaseDescriptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_019c392d-4aa2-7ca4-b066-8a80750d6b7f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeLeaseDescriptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019c392d-4aa2-76ba-b49f-5fc18ba05bd5" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_019c392d-4aa2-7ca4-b066-8a80750d6b7f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_019c392d-4aa2-7f33-a277-df0755e97c41" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_019c392d-4aa2-7ca4-b066-8a80750d6b7f" xlink:to="loc_srt_StatementGeographicalAxis_019c392d-4aa2-7f33-a277-df0755e97c41" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019c392d-4aa2-7f33-a277-df0755e97c41_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_019c392d-4aa2-7f33-a277-df0755e97c41" xlink:to="loc_srt_SegmentGeographicalDomain_019c392d-4aa2-7f33-a277-df0755e97c41_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019c392d-4aa2-7a87-8ec0-1c000abc5414" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_019c392d-4aa2-7f33-a277-df0755e97c41" xlink:to="loc_srt_SegmentGeographicalDomain_019c392d-4aa2-7a87-8ec0-1c000abc5414" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_VernonCaliforniaMember_019c392d-4aa2-736d-bc18-5b28936009b9" xlink:href="smci-20260331.xsd#smci_VernonCaliforniaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019c392d-4aa2-7a87-8ec0-1c000abc5414" xlink:to="loc_smci_VernonCaliforniaMember_019c392d-4aa2-736d-bc18-5b28936009b9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_OperatingLeaseAgreementNumberOfTranches_019c392d-4aa2-7d51-9c63-bccabd2cf6e4" xlink:href="smci-20260331.xsd#smci_OperatingLeaseAgreementNumberOfTranches"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019c392d-4aa2-76ba-b49f-5fc18ba05bd5" xlink:to="loc_smci_OperatingLeaseAgreementNumberOfTranches_019c392d-4aa2-7d51-9c63-bccabd2cf6e4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability_019c392d-4aa2-76b0-adf8-0487b44f923b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019c392d-4aa2-76ba-b49f-5fc18ba05bd5" xlink:to="loc_us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability_019c392d-4aa2-76b0-adf8-0487b44f923b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiability_019c392d-4aa2-7099-8f74-f607ab5bbc52" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019c392d-4aa2-76ba-b49f-5fc18ba05bd5" xlink:to="loc_us-gaap_OperatingLeaseLiability_019c392d-4aa2-7099-8f74-f607ab5bbc52" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.supermicro.com/role/RelatedPartyTransactionsNarrativeDetails" xlink:type="simple" xlink:href="smci-20260331.xsd#RelatedPartyTransactionsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.supermicro.com/role/RelatedPartyTransactionsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4aa2-7f82-b2cb-1f6be1b43632" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019c392d-4aa2-71e0-a54a-00741bd31047" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4aa2-7f82-b2cb-1f6be1b43632" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019c392d-4aa2-71e0-a54a-00741bd31047" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_019c392d-4aa2-73fe-94ec-8eba9cfa9de9" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019c392d-4aa2-71e0-a54a-00741bd31047" xlink:to="loc_srt_CounterpartyNameAxis_019c392d-4aa2-73fe-94ec-8eba9cfa9de9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019c392d-4aa2-73fe-94ec-8eba9cfa9de9_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_019c392d-4aa2-73fe-94ec-8eba9cfa9de9" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019c392d-4aa2-73fe-94ec-8eba9cfa9de9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019c392d-4aa2-7def-a690-25f1896fee72" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_019c392d-4aa2-73fe-94ec-8eba9cfa9de9" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019c392d-4aa2-7def-a690-25f1896fee72" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_AblecomTechnologyMember_019c392d-4aa2-7454-a8fb-54ca8ec7c594" xlink:href="smci-20260331.xsd#smci_AblecomTechnologyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019c392d-4aa2-7def-a690-25f1896fee72" xlink:to="loc_smci_AblecomTechnologyMember_019c392d-4aa2-7454-a8fb-54ca8ec7c594" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_ChienTsunChangSpouseOfSteveLiangMember_019c392d-4aa2-74d7-be8b-9861528c785d" xlink:href="smci-20260331.xsd#smci_ChienTsunChangSpouseOfSteveLiangMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019c392d-4aa2-7def-a690-25f1896fee72" xlink:to="loc_smci_ChienTsunChangSpouseOfSteveLiangMember_019c392d-4aa2-74d7-be8b-9861528c785d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c392d-4aa2-7e67-8c03-3682a94f7bde" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019c392d-4aa2-71e0-a54a-00741bd31047" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c392d-4aa2-7e67-8c03-3682a94f7bde" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019c392d-4aa2-7e67-8c03-3682a94f7bde_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c392d-4aa2-7e67-8c03-3682a94f7bde" xlink:to="loc_us-gaap_RelatedPartyDomain_019c392d-4aa2-7e67-8c03-3682a94f7bde_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019c392d-4aa2-7ad6-a5de-9031b4496658" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c392d-4aa2-7e67-8c03-3682a94f7bde" xlink:to="loc_us-gaap_RelatedPartyDomain_019c392d-4aa2-7ad6-a5de-9031b4496658" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ManagementMember_019c392d-4aa2-7e1a-9db2-1f73fa0690dd" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ManagementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019c392d-4aa2-7ad6-a5de-9031b4496658" xlink:to="loc_srt_ManagementMember_019c392d-4aa2-7e1a-9db2-1f73fa0690dd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_019c392d-4aa2-7b93-82c1-99113cf95cf2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019c392d-4aa2-7ad6-a5de-9031b4496658" xlink:to="loc_us-gaap_RelatedPartyMember_019c392d-4aa2-7b93-82c1-99113cf95cf2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019c392d-4aa2-7ea6-a05f-6b524419bb74" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019c392d-4aa2-71e0-a54a-00741bd31047" xlink:to="loc_dei_LegalEntityAxis_019c392d-4aa2-7ea6-a05f-6b524419bb74" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019c392d-4aa2-7ea6-a05f-6b524419bb74_default" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019c392d-4aa2-7ea6-a05f-6b524419bb74" xlink:to="loc_dei_EntityDomain_019c392d-4aa2-7ea6-a05f-6b524419bb74_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019c392d-4aa2-776b-b2df-15ed7f50a01c" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019c392d-4aa2-7ea6-a05f-6b524419bb74" xlink:to="loc_dei_EntityDomain_019c392d-4aa2-776b-b2df-15ed7f50a01c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_SteveLiangAndOtherFamilyMembersMember_019c392d-4aa2-7ce8-b5de-931d425bc525" xlink:href="smci-20260331.xsd#smci_SteveLiangAndOtherFamilyMembersMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019c392d-4aa2-776b-b2df-15ed7f50a01c" xlink:to="loc_smci_SteveLiangAndOtherFamilyMembersMember_019c392d-4aa2-7ce8-b5de-931d425bc525" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_CharlesLiangAndWifeMember_019c392d-4aa2-794f-a021-b51431a3ea1d" xlink:href="smci-20260331.xsd#smci_CharlesLiangAndWifeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019c392d-4aa2-776b-b2df-15ed7f50a01c" xlink:to="loc_smci_CharlesLiangAndWifeMember_019c392d-4aa2-794f-a021-b51431a3ea1d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_CharlesLiangMember_019c392d-4aa2-7b11-9d86-00e5ff67aaa7" xlink:href="smci-20260331.xsd#smci_CharlesLiangMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019c392d-4aa2-776b-b2df-15ed7f50a01c" xlink:to="loc_smci_CharlesLiangMember_019c392d-4aa2-7b11-9d86-00e5ff67aaa7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_RelatedPartyOwnershipPercentage_019c392d-4aa2-7aec-a48a-269153cc3df1" xlink:href="smci-20260331.xsd#smci_RelatedPartyOwnershipPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4aa2-7f82-b2cb-1f6be1b43632" xlink:to="loc_smci_RelatedPartyOwnershipPercentage_019c392d-4aa2-7aec-a48a-269153cc3df1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_019c392d-4aa2-70e3-8e25-074744d4f732" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4aa2-7f82-b2cb-1f6be1b43632" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_019c392d-4aa2-70e3-8e25-074744d4f732" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019c392d-4aa2-7cba-afa3-dc0f41c672b3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4aa2-7f82-b2cb-1f6be1b43632" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019c392d-4aa2-7cba-afa3-dc0f41c672b3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_NumberOfFinancialInstitutionsMarginLoans_019c392d-4aa2-7a18-ba21-434161c82f8c" xlink:href="smci-20260331.xsd#smci_NumberOfFinancialInstitutionsMarginLoans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4aa2-7f82-b2cb-1f6be1b43632" xlink:to="loc_smci_NumberOfFinancialInstitutionsMarginLoans_019c392d-4aa2-7a18-ba21-434161c82f8c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnsecuredDebt_019c392d-4aa2-7936-8c40-33fcde2580e0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnsecuredDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4aa2-7f82-b2cb-1f6be1b43632" xlink:to="loc_us-gaap_UnsecuredDebt_019c392d-4aa2-7936-8c40-33fcde2580e0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfUnsecuredDebt_019c392d-4aa2-7ee3-acfa-3d986bf0ee80" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RepaymentsOfUnsecuredDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4aa2-7f82-b2cb-1f6be1b43632" xlink:to="loc_us-gaap_RepaymentsOfUnsecuredDebt_019c392d-4aa2-7ee3-acfa-3d986bf0ee80" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.supermicro.com/role/RelatedPartyTransactionsDealingswithAblecomNarrativeDetails" xlink:type="simple" xlink:href="smci-20260331.xsd#RelatedPartyTransactionsDealingswithAblecomNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.supermicro.com/role/RelatedPartyTransactionsDealingswithAblecomNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4aa2-7cd3-96a2-dfd105cc3e03" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019c392d-4aa2-7f05-8db4-090ef0aab24f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4aa2-7cd3-96a2-dfd105cc3e03" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019c392d-4aa2-7f05-8db4-090ef0aab24f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_019c392d-4aa2-72c3-adef-17f2bbc7882b" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019c392d-4aa2-7f05-8db4-090ef0aab24f" xlink:to="loc_srt_CounterpartyNameAxis_019c392d-4aa2-72c3-adef-17f2bbc7882b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019c392d-4aa2-72c3-adef-17f2bbc7882b_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_019c392d-4aa2-72c3-adef-17f2bbc7882b" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019c392d-4aa2-72c3-adef-17f2bbc7882b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019c392d-4aa2-7b35-8b47-3c6440fc01ff" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_019c392d-4aa2-72c3-adef-17f2bbc7882b" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019c392d-4aa2-7b35-8b47-3c6440fc01ff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_AblecomTechnologyMember_019c392d-4aa2-78ad-a4ec-207776d11d06" xlink:href="smci-20260331.xsd#smci_AblecomTechnologyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019c392d-4aa2-7b35-8b47-3c6440fc01ff" xlink:to="loc_smci_AblecomTechnologyMember_019c392d-4aa2-78ad-a4ec-207776d11d06" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c392d-4aa2-7eed-8df2-6f6557001e6a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019c392d-4aa2-7f05-8db4-090ef0aab24f" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c392d-4aa2-7eed-8df2-6f6557001e6a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019c392d-4aa2-7eed-8df2-6f6557001e6a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c392d-4aa2-7eed-8df2-6f6557001e6a" xlink:to="loc_us-gaap_RelatedPartyDomain_019c392d-4aa2-7eed-8df2-6f6557001e6a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019c392d-4aa2-7dab-ac62-60890e083dd4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c392d-4aa2-7eed-8df2-6f6557001e6a" xlink:to="loc_us-gaap_RelatedPartyDomain_019c392d-4aa2-7dab-ac62-60890e083dd4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_019c392d-4aa2-7e85-888d-c29455f124aa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019c392d-4aa2-7dab-ac62-60890e083dd4" xlink:to="loc_us-gaap_RelatedPartyMember_019c392d-4aa2-7e85-888d-c29455f124aa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_PurchaseObligationTypeAxis_019c392d-4aa2-7a7b-95e6-f181a9bfe1d5" xlink:href="smci-20260331.xsd#smci_PurchaseObligationTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019c392d-4aa2-7f05-8db4-090ef0aab24f" xlink:to="loc_smci_PurchaseObligationTypeAxis_019c392d-4aa2-7a7b-95e6-f181a9bfe1d5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_PurchaseObligationTypeDomain_019c392d-4aa2-7a7b-95e6-f181a9bfe1d5_default" xlink:href="smci-20260331.xsd#smci_PurchaseObligationTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_smci_PurchaseObligationTypeAxis_019c392d-4aa2-7a7b-95e6-f181a9bfe1d5" xlink:to="loc_smci_PurchaseObligationTypeDomain_019c392d-4aa2-7a7b-95e6-f181a9bfe1d5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_PurchaseObligationTypeDomain_019c392d-4aa2-78f9-8e0f-2493dd85585b" xlink:href="smci-20260331.xsd#smci_PurchaseObligationTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_smci_PurchaseObligationTypeAxis_019c392d-4aa2-7a7b-95e6-f181a9bfe1d5" xlink:to="loc_smci_PurchaseObligationTypeDomain_019c392d-4aa2-78f9-8e0f-2493dd85585b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_NonCancellablePurchaseObligationMember_019c392d-4aa2-7bbf-acb6-30cf11b268a3" xlink:href="smci-20260331.xsd#smci_NonCancellablePurchaseObligationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_smci_PurchaseObligationTypeDomain_019c392d-4aa2-78f9-8e0f-2493dd85585b" xlink:to="loc_smci_NonCancellablePurchaseObligationMember_019c392d-4aa2-7bbf-acb6-30cf11b268a3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_RelatedPartyTransactionProductPurchasePercent_019c392d-4aa2-7901-8732-523fd81a5c4f" xlink:href="smci-20260331.xsd#smci_RelatedPartyTransactionProductPurchasePercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4aa2-7cd3-96a2-dfd105cc3e03" xlink:to="loc_smci_RelatedPartyTransactionProductPurchasePercent_019c392d-4aa2-7901-8732-523fd81a5c4f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PurchaseObligation_019c392d-4aa2-71ab-b5bf-2e8f561bfcc9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PurchaseObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4aa2-7cd3-96a2-dfd105cc3e03" xlink:to="loc_us-gaap_PurchaseObligation_019c392d-4aa2-71ab-b5bf-2e8f561bfcc9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019c392d-4aa2-77c3-92d2-cbd4fb71472b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4aa2-7cd3-96a2-dfd105cc3e03" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019c392d-4aa2-77c3-92d2-cbd4fb71472b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_LineOfCreditFacilityPaymentTerm_019c392d-4aa2-7b5f-baa1-d14fca4e55f1" xlink:href="smci-20260331.xsd#smci_LineOfCreditFacilityPaymentTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4aa2-7cd3-96a2-dfd105cc3e03" xlink:to="loc_smci_LineOfCreditFacilityPaymentTerm_019c392d-4aa2-7b5f-baa1-d14fca4e55f1" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.supermicro.com/role/RelatedPartyTransactionsDealingswithCompuwareNarrativeDetails" xlink:type="simple" xlink:href="smci-20260331.xsd#RelatedPartyTransactionsDealingswithCompuwareNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.supermicro.com/role/RelatedPartyTransactionsDealingswithCompuwareNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4aa2-7977-b803-e648a737ebcc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019c392d-4aa2-72a9-a6c3-46271dce1801" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4aa2-7977-b803-e648a737ebcc" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019c392d-4aa2-72a9-a6c3-46271dce1801" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_019c392d-4aa2-7c48-8c64-2be74fa49e6e" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019c392d-4aa2-72a9-a6c3-46271dce1801" xlink:to="loc_srt_CounterpartyNameAxis_019c392d-4aa2-7c48-8c64-2be74fa49e6e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019c392d-4aa2-7c48-8c64-2be74fa49e6e_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_019c392d-4aa2-7c48-8c64-2be74fa49e6e" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019c392d-4aa2-7c48-8c64-2be74fa49e6e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019c392d-4aa2-7cc8-8b29-674444aa28a7" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_019c392d-4aa2-7c48-8c64-2be74fa49e6e" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019c392d-4aa2-7cc8-8b29-674444aa28a7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_CompuwareMember_019c392d-4aa2-7c9c-ac11-c109493debd7" xlink:href="smci-20260331.xsd#smci_CompuwareMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019c392d-4aa2-7cc8-8b29-674444aa28a7" xlink:to="loc_smci_CompuwareMember_019c392d-4aa2-7c9c-ac11-c109493debd7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c392d-4aa2-7209-9e7c-ea3ccddf3a98" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019c392d-4aa2-72a9-a6c3-46271dce1801" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c392d-4aa2-7209-9e7c-ea3ccddf3a98" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019c392d-4aa2-7209-9e7c-ea3ccddf3a98_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c392d-4aa2-7209-9e7c-ea3ccddf3a98" xlink:to="loc_us-gaap_RelatedPartyDomain_019c392d-4aa2-7209-9e7c-ea3ccddf3a98_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019c392d-4aa2-76f6-9405-d7ca88bb4af7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c392d-4aa2-7209-9e7c-ea3ccddf3a98" xlink:to="loc_us-gaap_RelatedPartyDomain_019c392d-4aa2-76f6-9405-d7ca88bb4af7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_019c392d-4aa2-737c-8a55-5995461f31c7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019c392d-4aa2-76f6-9405-d7ca88bb4af7" xlink:to="loc_us-gaap_RelatedPartyMember_019c392d-4aa2-737c-8a55-5995461f31c7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MajorCustomersAxis_019e0848-ed13-7131-be44-f7ee099e1ce4" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MajorCustomersAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019c392d-4aa2-72a9-a6c3-46271dce1801" xlink:to="loc_srt_MajorCustomersAxis_019e0848-ed13-7131-be44-f7ee099e1ce4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_019e0848-ed13-7131-be44-f7ee099e1ce4_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_MajorCustomersAxis_019e0848-ed13-7131-be44-f7ee099e1ce4" xlink:to="loc_srt_NameOfMajorCustomerDomain_019e0848-ed13-7131-be44-f7ee099e1ce4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_019e0848-ed13-7d76-a3cc-2b60ab3b694e" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_MajorCustomersAxis_019e0848-ed13-7131-be44-f7ee099e1ce4" xlink:to="loc_srt_NameOfMajorCustomerDomain_019e0848-ed13-7d76-a3cc-2b60ab3b694e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_CompuwareMember_019e0849-0b32-7c82-a7ff-eb6d6b793bad" xlink:href="smci-20260331.xsd#smci_CompuwareMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_019e0848-ed13-7d76-a3cc-2b60ab3b694e" xlink:to="loc_smci_CompuwareMember_019e0849-0b32-7c82-a7ff-eb6d6b793bad" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019e0847-9d28-7883-b5ed-c2ace997d194" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019c392d-4aa2-72a9-a6c3-46271dce1801" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019e0847-9d28-7883-b5ed-c2ace997d194" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019e0847-9d28-7883-b5ed-c2ace997d194_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019e0847-9d28-7883-b5ed-c2ace997d194" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019e0847-9d28-7883-b5ed-c2ace997d194_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019e0847-9d28-7a3c-b638-1434062ef046" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019e0847-9d28-7883-b5ed-c2ace997d194" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019e0847-9d28-7a3c-b638-1434062ef046" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_PowerSuppliesPurchasedBenchmarkMember_019e0848-a755-7462-a127-ec85a71efd19" xlink:href="smci-20260331.xsd#smci_PowerSuppliesPurchasedBenchmarkMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019e0847-9d28-7a3c-b638-1434062ef046" xlink:to="loc_smci_PowerSuppliesPurchasedBenchmarkMember_019e0848-a755-7462-a127-ec85a71efd19" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_019e0847-b523-7fff-b082-6ac9e1c6791a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019c392d-4aa2-72a9-a6c3-46271dce1801" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_019e0847-b523-7fff-b082-6ac9e1c6791a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_019e0847-b523-7fff-b082-6ac9e1c6791a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_019e0847-b523-7fff-b082-6ac9e1c6791a" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_019e0847-b523-7fff-b082-6ac9e1c6791a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_019e0847-b523-7b6e-8d32-463b68c9f5c0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_019e0847-b523-7fff-b082-6ac9e1c6791a" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_019e0847-b523-7b6e-8d32-463b68c9f5c0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerConcentrationRiskMember_019e0848-02a7-7f67-832b-f6160ca87761" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CustomerConcentrationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_019e0847-b523-7b6e-8d32-463b68c9f5c0" xlink:to="loc_us-gaap_CustomerConcentrationRiskMember_019e0848-02a7-7f67-832b-f6160ca87761" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_PurchaseObligationTypeAxis_019c392d-4aa2-72d7-9776-aa7dae2b25a6" xlink:href="smci-20260331.xsd#smci_PurchaseObligationTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019c392d-4aa2-72a9-a6c3-46271dce1801" xlink:to="loc_smci_PurchaseObligationTypeAxis_019c392d-4aa2-72d7-9776-aa7dae2b25a6" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_PurchaseObligationTypeDomain_019c392d-4aa2-72d7-9776-aa7dae2b25a6_default" xlink:href="smci-20260331.xsd#smci_PurchaseObligationTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_smci_PurchaseObligationTypeAxis_019c392d-4aa2-72d7-9776-aa7dae2b25a6" xlink:to="loc_smci_PurchaseObligationTypeDomain_019c392d-4aa2-72d7-9776-aa7dae2b25a6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_PurchaseObligationTypeDomain_019c392d-4aa2-7ff9-b960-22fa6e083a64" xlink:href="smci-20260331.xsd#smci_PurchaseObligationTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_smci_PurchaseObligationTypeAxis_019c392d-4aa2-72d7-9776-aa7dae2b25a6" xlink:to="loc_smci_PurchaseObligationTypeDomain_019c392d-4aa2-7ff9-b960-22fa6e083a64" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_NonCancellablePurchaseObligationMember_019c392d-4aa2-720e-ac96-0eef3f4896d2" xlink:href="smci-20260331.xsd#smci_NonCancellablePurchaseObligationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_smci_PurchaseObligationTypeDomain_019c392d-4aa2-7ff9-b960-22fa6e083a64" xlink:to="loc_smci_NonCancellablePurchaseObligationMember_019c392d-4aa2-720e-ac96-0eef3f4896d2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019c392d-4aa2-7c60-9727-47e956bee652" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4aa2-7977-b803-e648a737ebcc" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019c392d-4aa2-7c60-9727-47e956bee652" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_LineOfCreditFacilityPaymentTerm_019c392d-4aa2-76f0-b436-b67fd3eabe28" xlink:href="smci-20260331.xsd#smci_LineOfCreditFacilityPaymentTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4aa2-7977-b803-e648a737ebcc" xlink:to="loc_smci_LineOfCreditFacilityPaymentTerm_019c392d-4aa2-76f0-b436-b67fd3eabe28" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_019e0847-4cd4-71c1-a848-1e9b7d78bcbe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskPercentage1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4aa2-7977-b803-e648a737ebcc" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_019e0847-4cd4-71c1-a848-1e9b7d78bcbe" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PurchaseObligation_019c392d-4aa2-79a6-947f-a8943f7b3781" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PurchaseObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4aa2-7977-b803-e648a737ebcc" xlink:to="loc_us-gaap_PurchaseObligation_019c392d-4aa2-79a6-947f-a8943f7b3781" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.supermicro.com/role/RelatedPartyTransactionsDealingswithLeadtekResearchIncNarrativeDetails" xlink:type="simple" xlink:href="smci-20260331.xsd#RelatedPartyTransactionsDealingswithLeadtekResearchIncNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.supermicro.com/role/RelatedPartyTransactionsDealingswithLeadtekResearchIncNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4aa2-7b32-9a34-b5c5f28c926d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019c392d-4aa2-7def-bd39-8bf0fde3c3db" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4aa2-7b32-9a34-b5c5f28c926d" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019c392d-4aa2-7def-bd39-8bf0fde3c3db" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_019c392d-4aa2-73e2-b3e8-2358cc16fbb2" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019c392d-4aa2-7def-bd39-8bf0fde3c3db" xlink:to="loc_srt_CounterpartyNameAxis_019c392d-4aa2-73e2-b3e8-2358cc16fbb2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019c392d-4aa2-73e2-b3e8-2358cc16fbb2_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_019c392d-4aa2-73e2-b3e8-2358cc16fbb2" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019c392d-4aa2-73e2-b3e8-2358cc16fbb2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019c392d-4aa2-7bf8-9f39-7f27b9aff28c" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_019c392d-4aa2-73e2-b3e8-2358cc16fbb2" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019c392d-4aa2-7bf8-9f39-7f27b9aff28c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_LeadtekMember_019c392d-4aa2-7a40-8d2a-d7026bcde4af" xlink:href="smci-20260331.xsd#smci_LeadtekMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019c392d-4aa2-7bf8-9f39-7f27b9aff28c" xlink:to="loc_smci_LeadtekMember_019c392d-4aa2-7a40-8d2a-d7026bcde4af" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019c392d-4aa2-7e21-8cfb-5d5dc98f4d29" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019c392d-4aa2-7def-bd39-8bf0fde3c3db" xlink:to="loc_dei_LegalEntityAxis_019c392d-4aa2-7e21-8cfb-5d5dc98f4d29" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019c392d-4aa2-7e21-8cfb-5d5dc98f4d29_default" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019c392d-4aa2-7e21-8cfb-5d5dc98f4d29" xlink:to="loc_dei_EntityDomain_019c392d-4aa2-7e21-8cfb-5d5dc98f4d29_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019c392d-4aa2-7ac4-a9ed-6e538bcbfb45" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019c392d-4aa2-7e21-8cfb-5d5dc98f4d29" xlink:to="loc_dei_EntityDomain_019c392d-4aa2-7ac4-a9ed-6e538bcbfb45" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_AblecomAndCompuwareMember_019c392d-4aa2-716c-b97c-7a1e4086784f" xlink:href="smci-20260331.xsd#smci_AblecomAndCompuwareMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019c392d-4aa2-7ac4-a9ed-6e538bcbfb45" xlink:to="loc_smci_AblecomAndCompuwareMember_019c392d-4aa2-716c-b97c-7a1e4086784f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByAssetClassAxis_019c392d-4aa2-7947-8cb0-80f0287f79fd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByAssetClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019c392d-4aa2-7def-bd39-8bf0fde3c3db" xlink:to="loc_us-gaap_FairValueByAssetClassAxis_019c392d-4aa2-7947-8cb0-80f0287f79fd" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_019c392d-4aa2-7947-8cb0-80f0287f79fd_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_019c392d-4aa2-7947-8cb0-80f0287f79fd" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_019c392d-4aa2-7947-8cb0-80f0287f79fd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_019c392d-4aa2-75fd-9f6d-c76931809c55" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_019c392d-4aa2-7947-8cb0-80f0287f79fd" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_019c392d-4aa2-75fd-9f6d-c76931809c55" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_ServersMember_019c392d-4aa2-7c18-a724-c5454b963cb1" xlink:href="smci-20260331.xsd#smci_ServersMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_019c392d-4aa2-75fd-9f6d-c76931809c55" xlink:to="loc_smci_ServersMember_019c392d-4aa2-7c18-a724-c5454b963cb1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_GraphicCardsMember_019c392d-4aa2-76a4-83b7-e05fa683fc70" xlink:href="smci-20260331.xsd#smci_GraphicCardsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_019c392d-4aa2-75fd-9f6d-c76931809c55" xlink:to="loc_smci_GraphicCardsMember_019c392d-4aa2-76a4-83b7-e05fa683fc70" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c392d-4aa2-7c80-a6bb-fbbaa45d8d72" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019c392d-4aa2-7def-bd39-8bf0fde3c3db" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c392d-4aa2-7c80-a6bb-fbbaa45d8d72" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019c392d-4aa2-7c80-a6bb-fbbaa45d8d72_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c392d-4aa2-7c80-a6bb-fbbaa45d8d72" xlink:to="loc_us-gaap_RelatedPartyDomain_019c392d-4aa2-7c80-a6bb-fbbaa45d8d72_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019c392d-4aa2-7d58-a97f-08a3b8ff22e9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c392d-4aa2-7c80-a6bb-fbbaa45d8d72" xlink:to="loc_us-gaap_RelatedPartyDomain_019c392d-4aa2-7d58-a97f-08a3b8ff22e9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_019c392d-4aa2-7c0d-bba2-8bb5fd1b1f35" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019c392d-4aa2-7d58-a97f-08a3b8ff22e9" xlink:to="loc_us-gaap_RelatedPartyMember_019c392d-4aa2-7c0d-bba2-8bb5fd1b1f35" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_RelatedPartyOwnershipPercentage_019c392d-4aa2-7ce7-869e-387c72afface" xlink:href="smci-20260331.xsd#smci_RelatedPartyOwnershipPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4aa2-7b32-9a34-b5c5f28c926d" xlink:to="loc_smci_RelatedPartyOwnershipPercentage_019c392d-4aa2-7ce7-869e-387c72afface" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_NumberOfBoardOfDirectorsServed_019c392d-4aa2-7ec0-8273-1a23a94fe7a4" xlink:href="smci-20260331.xsd#smci_NumberOfBoardOfDirectorsServed"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4aa2-7b32-9a34-b5c5f28c926d" xlink:to="loc_smci_NumberOfBoardOfDirectorsServed_019c392d-4aa2-7ec0-8273-1a23a94fe7a4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_NumberOfBoardOfDirectors_019c392d-4aa2-7e55-aefa-3b345370833d" xlink:href="smci-20260331.xsd#smci_NumberOfBoardOfDirectors"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4aa2-7b32-9a34-b5c5f28c926d" xlink:to="loc_smci_NumberOfBoardOfDirectors_019c392d-4aa2-7e55-aefa-3b345370833d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_019c392d-4aa2-77c4-b86f-b4f2346eba24" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4aa2-7b32-9a34-b5c5f28c926d" xlink:to="loc_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_019c392d-4aa2-77c4-b86f-b4f2346eba24" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_019c392d-4aa2-7607-a05d-4967977fe7ad" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4aa2-7b32-9a34-b5c5f28c926d" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_019c392d-4aa2-7607-a05d-4967977fe7ad" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.supermicro.com/role/RelatedPartyTransactionsDealingswithInvestmentinaCorporateVentureNarrativeDetails" xlink:type="simple" xlink:href="smci-20260331.xsd#RelatedPartyTransactionsDealingswithInvestmentinaCorporateVentureNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.supermicro.com/role/RelatedPartyTransactionsDealingswithInvestmentinaCorporateVentureNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4b59-73de-b013-e835d1da1863" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019c392d-4aa2-7be6-846c-a3f7e99c09aa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4b59-73de-b013-e835d1da1863" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019c392d-4aa2-7be6-846c-a3f7e99c09aa" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019c392d-4aa2-7644-b23b-33ed1ab5d298" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019c392d-4aa2-7be6-846c-a3f7e99c09aa" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019c392d-4aa2-7644-b23b-33ed1ab5d298" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019c392d-4aa2-7644-b23b-33ed1ab5d298_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019c392d-4aa2-7644-b23b-33ed1ab5d298" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019c392d-4aa2-7644-b23b-33ed1ab5d298_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019c392d-4aa2-7f4e-9968-908d48c69b4d" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019c392d-4aa2-7644-b23b-33ed1ab5d298" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019c392d-4aa2-7f4e-9968-908d48c69b4d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_CorporateVentureMember_019c392d-4aa2-72d4-b3e8-c2c8af4eeeb7" xlink:href="smci-20260331.xsd#smci_CorporateVentureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019c392d-4aa2-7f4e-9968-908d48c69b4d" xlink:to="loc_smci_CorporateVentureMember_019c392d-4aa2-72d4-b3e8-c2c8af4eeeb7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019c392d-4aa2-71b9-8fe7-143326ecdf1b" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019c392d-4aa2-7be6-846c-a3f7e99c09aa" xlink:to="loc_dei_LegalEntityAxis_019c392d-4aa2-71b9-8fe7-143326ecdf1b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019c392d-4aa2-71b9-8fe7-143326ecdf1b_default" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019c392d-4aa2-71b9-8fe7-143326ecdf1b" xlink:to="loc_dei_EntityDomain_019c392d-4aa2-71b9-8fe7-143326ecdf1b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019c392d-4aa2-7cb7-81ba-11219b8b7d3b" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019c392d-4aa2-71b9-8fe7-143326ecdf1b" xlink:to="loc_dei_EntityDomain_019c392d-4aa2-7cb7-81ba-11219b8b7d3b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_InvestorInChinaMember_019c392d-4aa2-7c91-9bab-fe0072569f64" xlink:href="smci-20260331.xsd#smci_InvestorInChinaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019c392d-4aa2-7cb7-81ba-11219b8b7d3b" xlink:to="loc_smci_InvestorInChinaMember_019c392d-4aa2-7c91-9bab-fe0072569f64" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c392d-4aa2-70f4-bd83-2cd694c8515c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019c392d-4aa2-7be6-846c-a3f7e99c09aa" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c392d-4aa2-70f4-bd83-2cd694c8515c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019c392d-4aa2-70f4-bd83-2cd694c8515c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c392d-4aa2-70f4-bd83-2cd694c8515c" xlink:to="loc_us-gaap_RelatedPartyDomain_019c392d-4aa2-70f4-bd83-2cd694c8515c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019c392d-4aa2-7e4a-8e29-e1cc154546ec" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c392d-4aa2-70f4-bd83-2cd694c8515c" xlink:to="loc_us-gaap_RelatedPartyDomain_019c392d-4aa2-7e4a-8e29-e1cc154546ec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_019c392d-4b59-72f6-a0a8-7706e0ad12c4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019c392d-4aa2-7e4a-8e29-e1cc154546ec" xlink:to="loc_us-gaap_RelatedPartyMember_019c392d-4b59-72f6-a0a8-7706e0ad12c4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeAxis_019c392d-4b59-7185-b424-785edc1a57c6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019c392d-4aa2-7be6-846c-a3f7e99c09aa" xlink:to="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeAxis_019c392d-4b59-7185-b424-785edc1a57c6" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain_019c392d-4b59-7185-b424-785edc1a57c6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeAxis_019c392d-4b59-7185-b424-785edc1a57c6" xlink:to="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain_019c392d-4b59-7185-b424-785edc1a57c6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain_019c392d-4b59-7df7-a21a-8cbba6fb2eec" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeAxis_019c392d-4b59-7185-b424-785edc1a57c6" xlink:to="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain_019c392d-4b59-7df7-a21a-8cbba6fb2eec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_CorporateVentureMember_019c392d-4b59-7d33-b825-09a3bda38605" xlink:href="smci-20260331.xsd#smci_CorporateVentureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain_019c392d-4b59-7df7-a21a-8cbba6fb2eec" xlink:to="loc_smci_CorporateVentureMember_019c392d-4b59-7d33-b825-09a3bda38605" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_019c392d-4b59-756a-a769-40db08f2d857" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityMethodInvestmentOwnershipPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4b59-73de-b013-e835d1da1863" xlink:to="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_019c392d-4b59-756a-a769-40db08f2d857" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment_019c392d-4b59-7c5a-983e-50a2cdf5179f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4b59-73de-b013-e835d1da1863" xlink:to="loc_us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment_019c392d-4b59-7c5a-983e-50a2cdf5179f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_EquityMethodInvestmentOwnershipPercentageDivested_019c392d-4b59-7196-bc7e-ea6aca5e47c0" xlink:href="smci-20260331.xsd#smci_EquityMethodInvestmentOwnershipPercentageDivested"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4b59-73de-b013-e835d1da1863" xlink:to="loc_smci_EquityMethodInvestmentOwnershipPercentageDivested_019c392d-4b59-7196-bc7e-ea6aca5e47c0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfRevenue_019c392d-4b59-72ca-ab17-4a59975ed915" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostOfRevenue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4b59-73de-b013-e835d1da1863" xlink:to="loc_us-gaap_CostOfRevenue_019c392d-4b59-72ca-ab17-4a59975ed915" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNet_019c392d-4b59-7e50-8dcf-6ad73f43baaf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsReceivableNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4b59-73de-b013-e835d1da1863" xlink:to="loc_us-gaap_AccountsReceivableNet_019c392d-4b59-7e50-8dcf-6ad73f43baaf" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.supermicro.com/role/RelatedPartyTransactionsOtherTransactionsNarrativeDetails" xlink:type="simple" xlink:href="smci-20260331.xsd#RelatedPartyTransactionsOtherTransactionsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.supermicro.com/role/RelatedPartyTransactionsOtherTransactionsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4b59-733a-a13a-ff2370a69177" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019c392d-4b59-7cf4-9d99-4d71e50fb95c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4b59-733a-a13a-ff2370a69177" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019c392d-4b59-7cf4-9d99-4d71e50fb95c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_019c392d-4b59-77fa-a294-a4a97d33903e" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019c392d-4b59-7cf4-9d99-4d71e50fb95c" xlink:to="loc_srt_CounterpartyNameAxis_019c392d-4b59-77fa-a294-a4a97d33903e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019c392d-4b59-77fa-a294-a4a97d33903e_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_019c392d-4b59-77fa-a294-a4a97d33903e" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019c392d-4b59-77fa-a294-a4a97d33903e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019c392d-4b59-7904-8a77-c37a4a452d65" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_019c392d-4b59-77fa-a294-a4a97d33903e" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019c392d-4b59-7904-8a77-c37a4a452d65" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_GreenEarthMember_019c392d-4b59-72d7-88f8-ea6640f46183" xlink:href="smci-20260331.xsd#smci_GreenEarthMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019c392d-4b59-7904-8a77-c37a4a452d65" xlink:to="loc_smci_GreenEarthMember_019c392d-4b59-72d7-88f8-ea6640f46183" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c392d-4b59-7b18-9d72-09bbbbee726e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019c392d-4b59-7cf4-9d99-4d71e50fb95c" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c392d-4b59-7b18-9d72-09bbbbee726e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019c392d-4b59-7b18-9d72-09bbbbee726e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c392d-4b59-7b18-9d72-09bbbbee726e" xlink:to="loc_us-gaap_RelatedPartyDomain_019c392d-4b59-7b18-9d72-09bbbbee726e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019c392d-4b59-7b16-ad3b-3d29bbf789a7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c392d-4b59-7b18-9d72-09bbbbee726e" xlink:to="loc_us-gaap_RelatedPartyDomain_019c392d-4b59-7b16-ad3b-3d29bbf789a7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_019c392d-4b59-75b4-85b8-ab7677fb9eef" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019c392d-4b59-7b16-ad3b-3d29bbf789a7" xlink:to="loc_us-gaap_RelatedPartyMember_019c392d-4b59-75b4-85b8-ab7677fb9eef" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019c392d-4b59-7d89-88e4-1d74185642d0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4b59-733a-a13a-ff2370a69177" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019c392d-4b59-7d89-88e4-1d74185642d0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfRevenue_019c392d-4b59-7456-aba0-2f9b62cd18e8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostOfRevenue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4b59-733a-a13a-ff2370a69177" xlink:to="loc_us-gaap_CostOfRevenue_019c392d-4b59-7456-aba0-2f9b62cd18e8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_RelatedPartyTransactionChargebacks_019c392d-4b59-748f-b092-ff1a3e3da4da" xlink:href="smci-20260331.xsd#smci_RelatedPartyTransactionChargebacks"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4b59-733a-a13a-ff2370a69177" xlink:to="loc_smci_RelatedPartyTransactionChargebacks_019c392d-4b59-748f-b092-ff1a3e3da4da" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrent_019c392d-4b59-7aa3-be4d-7554e80d3adf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsPayableCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4b59-733a-a13a-ff2370a69177" xlink:to="loc_us-gaap_AccountsPayableCurrent_019c392d-4b59-7aa3-be4d-7554e80d3adf" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_019c392d-4b59-727c-8ac2-3508c3757d1e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsReceivableNetCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4b59-733a-a13a-ff2370a69177" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_019c392d-4b59-727c-8ac2-3508c3757d1e" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.supermicro.com/role/RelatedPartyTransactionsScheduleofRelatedPartyTransactionsDetails" xlink:type="simple" xlink:href="smci-20260331.xsd#RelatedPartyTransactionsScheduleofRelatedPartyTransactionsDetails"/>
  <link:definitionLink xlink:role="http://www.supermicro.com/role/RelatedPartyTransactionsScheduleofRelatedPartyTransactionsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4b59-732e-a38a-6d1e76795dac" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019c392d-4b59-7165-81bd-f1b01e705a06" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4b59-732e-a38a-6d1e76795dac" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019c392d-4b59-7165-81bd-f1b01e705a06" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_019c392d-4b59-7142-88a3-568d5121d04c" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019c392d-4b59-7165-81bd-f1b01e705a06" xlink:to="loc_srt_CounterpartyNameAxis_019c392d-4b59-7142-88a3-568d5121d04c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019c392d-4b59-7142-88a3-568d5121d04c_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_019c392d-4b59-7142-88a3-568d5121d04c" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019c392d-4b59-7142-88a3-568d5121d04c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019c392d-4b59-76cb-9dc1-22c8a11690bc" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_019c392d-4b59-7142-88a3-568d5121d04c" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019c392d-4b59-76cb-9dc1-22c8a11690bc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_AblecomTechnologyMember_019c392d-4b59-7fb4-9b31-13853b818ae3" xlink:href="smci-20260331.xsd#smci_AblecomTechnologyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019c392d-4b59-76cb-9dc1-22c8a11690bc" xlink:to="loc_smci_AblecomTechnologyMember_019c392d-4b59-7fb4-9b31-13853b818ae3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_CompuwareMember_019c392d-4b59-705c-a5cb-4fc68b852673" xlink:href="smci-20260331.xsd#smci_CompuwareMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019c392d-4b59-76cb-9dc1-22c8a11690bc" xlink:to="loc_smci_CompuwareMember_019c392d-4b59-705c-a5cb-4fc68b852673" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_CorporateVentureInChinaMember_019c392d-4b59-7218-8479-ba391b432d3d" xlink:href="smci-20260331.xsd#smci_CorporateVentureInChinaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019c392d-4b59-76cb-9dc1-22c8a11690bc" xlink:to="loc_smci_CorporateVentureInChinaMember_019c392d-4b59-7218-8479-ba391b432d3d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_LeadtekMember_019c392d-4b59-7357-9018-4d4723d43dea" xlink:href="smci-20260331.xsd#smci_LeadtekMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019c392d-4b59-76cb-9dc1-22c8a11690bc" xlink:to="loc_smci_LeadtekMember_019c392d-4b59-7357-9018-4d4723d43dea" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_GreenEarthMember_019c392d-4b59-740f-809c-5cdda543b068" xlink:href="smci-20260331.xsd#smci_GreenEarthMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019c392d-4b59-76cb-9dc1-22c8a11690bc" xlink:to="loc_smci_GreenEarthMember_019c392d-4b59-740f-809c-5cdda543b068" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c392d-4b59-73bb-90e5-8b7bf7f8d79b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019c392d-4b59-7165-81bd-f1b01e705a06" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c392d-4b59-73bb-90e5-8b7bf7f8d79b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019c392d-4b59-73bb-90e5-8b7bf7f8d79b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c392d-4b59-73bb-90e5-8b7bf7f8d79b" xlink:to="loc_us-gaap_RelatedPartyDomain_019c392d-4b59-73bb-90e5-8b7bf7f8d79b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019c392d-4b59-77d5-bb0f-823fc4c12ce6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c392d-4b59-73bb-90e5-8b7bf7f8d79b" xlink:to="loc_us-gaap_RelatedPartyDomain_019c392d-4b59-77d5-bb0f-823fc4c12ce6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_019c392d-4b59-7f56-b4ae-f5402b4fc0d0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019c392d-4b59-77d5-bb0f-823fc4c12ce6" xlink:to="loc_us-gaap_RelatedPartyMember_019c392d-4b59-7f56-b4ae-f5402b4fc0d0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_019c392d-4b59-7621-826d-98238e42663b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsReceivableNetCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4b59-732e-a38a-6d1e76795dac" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_019c392d-4b59-7621-826d-98238e42663b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_019c392d-4b59-7f77-a402-9e9effeb4a7a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4b59-732e-a38a-6d1e76795dac" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_019c392d-4b59-7f77-a402-9e9effeb4a7a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_019c392d-4b59-7b76-9a63-7973ac466593" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAssetsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4b59-732e-a38a-6d1e76795dac" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_019c392d-4b59-7b76-9a63-7973ac466593" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrent_019c392d-4b59-7b57-b4d4-0fbfb41bc768" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsPayableCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4b59-732e-a38a-6d1e76795dac" xlink:to="loc_us-gaap_AccountsPayableCurrent_019c392d-4b59-7b57-b4d4-0fbfb41bc768" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_019c392d-4b59-7006-bbb9-4a95610ff662" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccruedLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4b59-732e-a38a-6d1e76795dac" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrent_019c392d-4b59-7006-bbb9-4a95610ff662" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_019c392d-4b59-7c0c-bf13-710618591bd1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherLiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4b59-732e-a38a-6d1e76795dac" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_019c392d-4b59-7c0c-bf13-710618591bd1" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019c392d-4b59-774a-92a3-82a71686807e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4b59-732e-a38a-6d1e76795dac" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019c392d-4b59-774a-92a3-82a71686807e" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfRevenue_019c392d-4b59-7be1-94dd-2871d934960b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostOfRevenue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4b59-732e-a38a-6d1e76795dac" xlink:to="loc_us-gaap_CostOfRevenue_019c392d-4b59-7be1-94dd-2871d934960b" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireProductiveAssets_019c392d-4b59-79ad-9910-85926d3d1d42" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsToAcquireProductiveAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4b59-732e-a38a-6d1e76795dac" xlink:to="loc_us-gaap_PaymentsToAcquireProductiveAssets_019c392d-4b59-79ad-9910-85926d3d1d42" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpense_019c392d-4b59-7d36-8982-d21728235f9e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ResearchAndDevelopmentExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4b59-732e-a38a-6d1e76795dac" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpense_019c392d-4b59-7d36-8982-d21728235f9e" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_SellingAndMarketingExpenseNet_019c392d-4b59-74c2-aa6c-cba7c8596804" xlink:href="smci-20260331.xsd#smci_SellingAndMarketingExpenseNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4b59-732e-a38a-6d1e76795dac" xlink:to="loc_smci_SellingAndMarketingExpenseNet_019c392d-4b59-74c2-aa6c-cba7c8596804" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_019c392d-4b59-7700-8c4d-aac8326cc5d2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4b59-732e-a38a-6d1e76795dac" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_019c392d-4b59-7700-8c4d-aac8326cc5d2" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_019c392d-4b59-754d-b30b-e8518de4d35e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4b59-732e-a38a-6d1e76795dac" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_019c392d-4b59-754d-b30b-e8518de4d35e" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayable_019c392d-4b59-7ba6-a2dd-f53fe8205bae" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccountsPayable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4b59-732e-a38a-6d1e76795dac" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayable_019c392d-4b59-7ba6-a2dd-f53fe8205bae" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedLiabilities_019c392d-4b59-7d4b-8122-32fd1f70345b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccruedLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4b59-732e-a38a-6d1e76795dac" xlink:to="loc_us-gaap_IncreaseDecreaseInAccruedLiabilities_019c392d-4b59-7d4b-8122-32fd1f70345b" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities_019c392d-4b59-7721-ba50-24a0f2167344" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4b59-732e-a38a-6d1e76795dac" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities_019c392d-4b59-7721-ba50-24a0f2167344" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_019c392d-4b59-72b5-b6ac-5ce173c0c7ab" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4b59-732e-a38a-6d1e76795dac" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_019c392d-4b59-72b5-b6ac-5ce173c0c7ab" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalExpendituresIncurredButNotYetPaid_019c392d-4b59-7ffb-970d-19735dc571af" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CapitalExpendituresIncurredButNotYetPaid"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c392d-4b59-732e-a38a-6d1e76795dac" xlink:to="loc_us-gaap_CapitalExpendituresIncurredButNotYetPaid_019c392d-4b59-7ffb-970d-19735dc571af" xlink:type="arc" order="17"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.supermicro.com/role/StockbasedCompensationandStockholdersEquityEquityIncentivePlanandOfferingsofCommonStockNarrativeDetails" xlink:type="simple" xlink:href="smci-20260331.xsd#StockbasedCompensationandStockholdersEquityEquityIncentivePlanandOfferingsofCommonStockNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.supermicro.com/role/StockbasedCompensationandStockholdersEquityEquityIncentivePlanandOfferingsofCommonStockNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-7d3e-b0a4-e354946aed58" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019c392d-4b59-77d5-83ce-51e30b2c7aa3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-7d3e-b0a4-e354946aed58" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019c392d-4b59-77d5-83ce-51e30b2c7aa3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019c392d-4b59-798d-b1e9-e94cd37799b2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019c392d-4b59-77d5-83ce-51e30b2c7aa3" xlink:to="loc_us-gaap_AwardTypeAxis_019c392d-4b59-798d-b1e9-e94cd37799b2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c392d-4b59-798d-b1e9-e94cd37799b2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019c392d-4b59-798d-b1e9-e94cd37799b2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c392d-4b59-798d-b1e9-e94cd37799b2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c392d-4b59-71cc-9471-c2ce16e51810" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019c392d-4b59-798d-b1e9-e94cd37799b2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c392d-4b59-71cc-9471-c2ce16e51810" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_019c392d-4b59-7668-8cbe-b42ca4f7f515" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c392d-4b59-71cc-9471-c2ce16e51810" xlink:to="loc_us-gaap_EmployeeStockOptionMember_019c392d-4b59-7668-8cbe-b42ca4f7f515" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_EmployeeStockOptionsandRestrictedStockUnitsMember_019c392d-4b59-7f6a-8d78-1f96ec62b33a" xlink:href="smci-20260331.xsd#smci_EmployeeStockOptionsandRestrictedStockUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c392d-4b59-71cc-9471-c2ce16e51810" xlink:to="loc_smci_EmployeeStockOptionsandRestrictedStockUnitsMember_019c392d-4b59-7f6a-8d78-1f96ec62b33a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingAxis_019c392d-4b59-720f-a9fe-be4ee9eb922d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VestingAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019c392d-4b59-77d5-83ce-51e30b2c7aa3" xlink:to="loc_us-gaap_VestingAxis_019c392d-4b59-720f-a9fe-be4ee9eb922d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingDomain_019c392d-4b59-720f-a9fe-be4ee9eb922d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VestingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VestingAxis_019c392d-4b59-720f-a9fe-be4ee9eb922d" xlink:to="loc_us-gaap_VestingDomain_019c392d-4b59-720f-a9fe-be4ee9eb922d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingDomain_019c392d-4b59-7302-b8e0-68251026455a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VestingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VestingAxis_019c392d-4b59-720f-a9fe-be4ee9eb922d" xlink:to="loc_us-gaap_VestingDomain_019c392d-4b59-7302-b8e0-68251026455a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationAwardTrancheOneMember_019c392d-4b59-785c-a0f7-22978cc50d20" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationAwardTrancheOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_019c392d-4b59-7302-b8e0-68251026455a" xlink:to="loc_us-gaap_ShareBasedCompensationAwardTrancheOneMember_019c392d-4b59-785c-a0f7-22978cc50d20" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_ShareBasedCompensationTrancheTwoAndThereafterMember_019c392d-4b59-7011-b8c6-f4cbe5c75b77" xlink:href="smci-20260331.xsd#smci_ShareBasedCompensationTrancheTwoAndThereafterMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_019c392d-4b59-7302-b8e0-68251026455a" xlink:to="loc_smci_ShareBasedCompensationTrancheTwoAndThereafterMember_019c392d-4b59-7011-b8c6-f4cbe5c75b77" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_019c392d-4b59-7aac-a993-8ddb4aed389f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019c392d-4b59-77d5-83ce-51e30b2c7aa3" xlink:to="loc_us-gaap_PlanNameAxis_019c392d-4b59-7aac-a993-8ddb4aed389f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019c392d-4b59-7aac-a993-8ddb4aed389f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_019c392d-4b59-7aac-a993-8ddb4aed389f" xlink:to="loc_us-gaap_PlanNameDomain_019c392d-4b59-7aac-a993-8ddb4aed389f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019c392d-4b59-7358-aa07-d29de2b65c49" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_019c392d-4b59-7aac-a993-8ddb4aed389f" xlink:to="loc_us-gaap_PlanNameDomain_019c392d-4b59-7358-aa07-d29de2b65c49" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_EquityIncentivePlanTwoThousandTwentyMember_019c392d-4b59-7b53-8c9e-ec6ceb03d3fc" xlink:href="smci-20260331.xsd#smci_EquityIncentivePlanTwoThousandTwentyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019c392d-4b59-7358-aa07-d29de2b65c49" xlink:to="loc_smci_EquityIncentivePlanTwoThousandTwentyMember_019c392d-4b59-7b53-8c9e-ec6ceb03d3fc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_EquityIncentivePlan2016Member_019c392d-4b59-7120-b443-70a5b1680bb3" xlink:href="smci-20260331.xsd#smci_EquityIncentivePlan2016Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019c392d-4b59-7358-aa07-d29de2b65c49" xlink:to="loc_smci_EquityIncentivePlan2016Member_019c392d-4b59-7120-b443-70a5b1680bb3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_019c392d-4b59-7289-8e33-2d3bd880a577" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-7d3e-b0a4-e354946aed58" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_019c392d-4b59-7289-8e33-2d3bd880a577" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_019c392d-4b59-7b63-bfc8-902b900d0a40" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockCapitalSharesReservedForFutureIssuance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-7d3e-b0a4-e354946aed58" xlink:to="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_019c392d-4b59-7b63-bfc8-902b900d0a40" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_019c392d-4b59-7f6a-9251-d9a8bf2f0f6e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-7d3e-b0a4-e354946aed58" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_019c392d-4b59-7f6a-9251-d9a8bf2f0f6e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized_019c392d-4b59-74ad-8b64-c1b5e58fd6d6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-7d3e-b0a4-e354946aed58" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized_019c392d-4b59-74ad-8b64-c1b5e58fd6d6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent_019c392d-4b59-7843-8980-2c3ee6669055" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-7d3e-b0a4-e354946aed58" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent_019c392d-4b59-7843-8980-2c3ee6669055" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_ShareBasedCompensationArrangementByShareBasedPaymentAwardOwnershipThresholdForEmployeesToQualifyForExercisePricePerShareForIncentiveStockOptionsPercentage_019c392d-4b59-7be0-a802-caf1e4fb091d" xlink:href="smci-20260331.xsd#smci_ShareBasedCompensationArrangementByShareBasedPaymentAwardOwnershipThresholdForEmployeesToQualifyForExercisePricePerShareForIncentiveStockOptionsPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-7d3e-b0a4-e354946aed58" xlink:to="loc_smci_ShareBasedCompensationArrangementByShareBasedPaymentAwardOwnershipThresholdForEmployeesToQualifyForExercisePricePerShareForIncentiveStockOptionsPercentage_019c392d-4b59-7be0-a802-caf1e4fb091d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_019c392d-4b59-7d72-81a7-bfe5aa6061fa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-7d3e-b0a4-e354946aed58" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_019c392d-4b59-7d72-81a7-bfe5aa6061fa" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_019c392d-4b59-7604-8f6d-3f2723d1ef62" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-7d3e-b0a4-e354946aed58" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_019c392d-4b59-7604-8f6d-3f2723d1ef62" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_019c392d-4b59-7566-a6d7-784f2cc61c40" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-7d3e-b0a4-e354946aed58" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_019c392d-4b59-7566-a6d7-784f2cc61c40" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriodAfterOneYear_019c392d-4b59-7b93-a7d9-564fc0d646c2" xlink:href="smci-20260331.xsd#smci_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriodAfterOneYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-7d3e-b0a4-e354946aed58" xlink:to="loc_smci_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriodAfterOneYear_019c392d-4b59-7b93-a7d9-564fc0d646c2" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_019c392d-4b59-7cf2-90d3-c80bcce6a080" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-7d3e-b0a4-e354946aed58" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_019c392d-4b59-7cf2-90d3-c80bcce6a080" xlink:type="arc" order="10"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.supermicro.com/role/StockbasedCompensationandStockholdersEquityDeterminingFairValueNarrativeDetails" xlink:type="simple" xlink:href="smci-20260331.xsd#StockbasedCompensationandStockholdersEquityDeterminingFairValueNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.supermicro.com/role/StockbasedCompensationandStockholdersEquityDeterminingFairValueNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-7bfe-ba34-0cbce32fd184" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019c392d-4b59-7ba8-81b6-377ab0c3b9b6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-7bfe-ba34-0cbce32fd184" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019c392d-4b59-7ba8-81b6-377ab0c3b9b6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019c392d-4b59-74e5-8f6c-296f46fccae5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019c392d-4b59-7ba8-81b6-377ab0c3b9b6" xlink:to="loc_us-gaap_AwardTypeAxis_019c392d-4b59-74e5-8f6c-296f46fccae5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c392d-4b59-74e5-8f6c-296f46fccae5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019c392d-4b59-74e5-8f6c-296f46fccae5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c392d-4b59-74e5-8f6c-296f46fccae5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c392d-4b59-7224-aa33-6bab6432762a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019c392d-4b59-74e5-8f6c-296f46fccae5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c392d-4b59-7224-aa33-6bab6432762a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_019c392d-4b59-7f51-8f9f-659bf76aaf9d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c392d-4b59-7224-aa33-6bab6432762a" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_019c392d-4b59-7f51-8f9f-659bf76aaf9d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_019c392d-4b59-72c8-ac48-9897e940a886" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-7bfe-ba34-0cbce32fd184" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_019c392d-4b59-72c8-ac48-9897e940a886" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_019c392d-4b59-750f-a615-d5bf550988b7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-7bfe-ba34-0cbce32fd184" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_019c392d-4b59-750f-a615-d5bf550988b7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount_019c392d-4b59-7837-a1b0-4e24520dc785" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-7bfe-ba34-0cbce32fd184" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount_019c392d-4b59-7837-a1b0-4e24520dc785" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.supermicro.com/role/StockbasedCompensationandStockholdersEquityScheduleofStockOptionValuationAssumptionsDetails" xlink:type="simple" xlink:href="smci-20260331.xsd#StockbasedCompensationandStockholdersEquityScheduleofStockOptionValuationAssumptionsDetails"/>
  <link:definitionLink xlink:role="http://www.supermicro.com/role/StockbasedCompensationandStockholdersEquityScheduleofStockOptionValuationAssumptionsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-70ba-ab89-430c08a4c18b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019c392d-4b59-7708-a4ae-d65c81c16e49" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-70ba-ab89-430c08a4c18b" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019c392d-4b59-7708-a4ae-d65c81c16e49" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019c392d-4b59-741d-9569-138f3b294360" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019c392d-4b59-7708-a4ae-d65c81c16e49" xlink:to="loc_us-gaap_AwardTypeAxis_019c392d-4b59-741d-9569-138f3b294360" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c392d-4b59-741d-9569-138f3b294360_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019c392d-4b59-741d-9569-138f3b294360" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c392d-4b59-741d-9569-138f3b294360_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c392d-4b59-7341-a287-87bbbf5478fa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019c392d-4b59-741d-9569-138f3b294360" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c392d-4b59-7341-a287-87bbbf5478fa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_019c392d-4b59-7f1a-8fc8-18610cb07c2b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c392d-4b59-7341-a287-87bbbf5478fa" xlink:to="loc_us-gaap_EmployeeStockOptionMember_019c392d-4b59-7f1a-8fc8-18610cb07c2b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019c392d-4b59-7d39-8d24-7197d39bd6ab" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019c392d-4b59-7708-a4ae-d65c81c16e49" xlink:to="loc_srt_RangeAxis_019c392d-4b59-7d39-8d24-7197d39bd6ab" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019c392d-4b59-7d39-8d24-7197d39bd6ab_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019c392d-4b59-7d39-8d24-7197d39bd6ab" xlink:to="loc_srt_RangeMember_019c392d-4b59-7d39-8d24-7197d39bd6ab_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019c392d-4b59-759e-a137-d6c6934e6f10" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019c392d-4b59-7d39-8d24-7197d39bd6ab" xlink:to="loc_srt_RangeMember_019c392d-4b59-759e-a137-d6c6934e6f10" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019c392d-4b59-7fd8-96a0-cfeffdbf60bf" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019c392d-4b59-759e-a137-d6c6934e6f10" xlink:to="loc_srt_MinimumMember_019c392d-4b59-7fd8-96a0-cfeffdbf60bf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019c392d-4b59-768e-91f2-ca550ecbcf38" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019c392d-4b59-759e-a137-d6c6934e6f10" xlink:to="loc_srt_MaximumMember_019c392d-4b59-768e-91f2-ca550ecbcf38" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_019dcee0-1530-7cc9-9131-079a88d0ee65" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-70ba-ab89-430c08a4c18b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_019dcee0-1530-7cc9-9131-079a88d0ee65" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum_019c392d-4b59-702e-9611-1cf140a0054c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-70ba-ab89-430c08a4c18b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum_019c392d-4b59-702e-9611-1cf140a0054c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum_019c392d-4b59-7e35-a22b-beb0aabf0e37" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-70ba-ab89-430c08a4c18b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum_019c392d-4b59-7e35-a22b-beb0aabf0e37" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_019c392d-4b59-78da-b770-14a0f5aa8f3c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-70ba-ab89-430c08a4c18b" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_019c392d-4b59-78da-b770-14a0f5aa8f3c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_019c392d-4b59-742d-b0e0-af39504c60f5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-70ba-ab89-430c08a4c18b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_019c392d-4b59-742d-b0e0-af39504c60f5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_019dcee0-e1b8-7e18-94f4-322f21fafcb6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-70ba-ab89-430c08a4c18b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_019dcee0-e1b8-7e18-94f4-322f21fafcb6" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum_019c392d-4b59-7e17-8de0-7a54b446807b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-70ba-ab89-430c08a4c18b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum_019c392d-4b59-7e17-8de0-7a54b446807b" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum_019c392d-4b59-750b-b3c2-ac2a01298ca3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-70ba-ab89-430c08a4c18b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum_019c392d-4b59-750b-b3c2-ac2a01298ca3" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.supermicro.com/role/StockbasedCompensationandStockholdersEquityScheduleofStockbasedCompensationExpenseDetails" xlink:type="simple" xlink:href="smci-20260331.xsd#StockbasedCompensationandStockholdersEquityScheduleofStockbasedCompensationExpenseDetails"/>
  <link:definitionLink xlink:role="http://www.supermicro.com/role/StockbasedCompensationandStockholdersEquityScheduleofStockbasedCompensationExpenseDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-7808-a9ae-72193dc3f783" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019c392d-4b59-7b28-b979-9584ff607285" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-7808-a9ae-72193dc3f783" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019c392d-4b59-7b28-b979-9584ff607285" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_019c392d-4b59-7511-b54e-7f989be29ce6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019c392d-4b59-7b28-b979-9584ff607285" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_019c392d-4b59-7511-b54e-7f989be29ce6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_019c392d-4b59-7511-b54e-7f989be29ce6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_019c392d-4b59-7511-b54e-7f989be29ce6" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_019c392d-4b59-7511-b54e-7f989be29ce6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_019c392d-4b59-73a3-9aaf-18de5e1baf04" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_019c392d-4b59-7511-b54e-7f989be29ce6" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_019c392d-4b59-73a3-9aaf-18de5e1baf04" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfSalesMember_019c392d-4b59-7828-a81b-d19e6c2c9520" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostOfSalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_019c392d-4b59-73a3-9aaf-18de5e1baf04" xlink:to="loc_us-gaap_CostOfSalesMember_019c392d-4b59-7828-a81b-d19e6c2c9520" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpenseMember_019c392d-4b59-7f08-b45b-d33c8ff5fdab" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ResearchAndDevelopmentExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_019c392d-4b59-73a3-9aaf-18de5e1baf04" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpenseMember_019c392d-4b59-7f08-b45b-d33c8ff5fdab" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingAndMarketingExpenseMember_019c392d-4b59-7f82-b15f-f058d792e507" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SellingAndMarketingExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_019c392d-4b59-73a3-9aaf-18de5e1baf04" xlink:to="loc_us-gaap_SellingAndMarketingExpenseMember_019c392d-4b59-7f82-b15f-f058d792e507" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpenseMember_019c392d-4b59-7e7f-baf8-29101666ba85" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GeneralAndAdministrativeExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_019c392d-4b59-73a3-9aaf-18de5e1baf04" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpenseMember_019c392d-4b59-7e7f-baf8-29101666ba85" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_019c392d-4b59-756c-ade5-72f90d0941ae" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-7808-a9ae-72193dc3f783" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_019c392d-4b59-756c-ade5-72f90d0941ae" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense_019c392d-4b59-717e-bf7f-0fb76d16dd8c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-7808-a9ae-72193dc3f783" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense_019c392d-4b59-717e-bf7f-0fb76d16dd8c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax_019c392d-4b59-7292-a659-54e30ee6ebb8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-7808-a9ae-72193dc3f783" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax_019c392d-4b59-7292-a659-54e30ee6ebb8" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.supermicro.com/role/StockbasedCompensationandStockholdersEquityStockOptionandRSUNarrativeDetails" xlink:type="simple" xlink:href="smci-20260331.xsd#StockbasedCompensationandStockholdersEquityStockOptionandRSUNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.supermicro.com/role/StockbasedCompensationandStockholdersEquityStockOptionandRSUNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-7b91-b74a-f0ff6659385c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019c392d-4b59-728c-8f5d-40cf860fc051" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-7b91-b74a-f0ff6659385c" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019c392d-4b59-728c-8f5d-40cf860fc051" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019c392d-4b59-7447-b23e-9c71bed93fd0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019c392d-4b59-728c-8f5d-40cf860fc051" xlink:to="loc_us-gaap_AwardTypeAxis_019c392d-4b59-7447-b23e-9c71bed93fd0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c392d-4b59-7447-b23e-9c71bed93fd0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019c392d-4b59-7447-b23e-9c71bed93fd0" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c392d-4b59-7447-b23e-9c71bed93fd0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c392d-4b59-764f-aab6-6be18d680d3b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019c392d-4b59-7447-b23e-9c71bed93fd0" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c392d-4b59-764f-aab6-6be18d680d3b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_TwoThousandTwentyThreeCEOPerformanceAwardMember_019c392d-4b59-73b0-88e9-be76c21262e5" xlink:href="smci-20260331.xsd#smci_TwoThousandTwentyThreeCEOPerformanceAwardMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c392d-4b59-764f-aab6-6be18d680d3b" xlink:to="loc_smci_TwoThousandTwentyThreeCEOPerformanceAwardMember_019c392d-4b59-73b0-88e9-be76c21262e5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_019c392d-4b59-7c14-8e48-87cf27c446b8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c392d-4b59-764f-aab6-6be18d680d3b" xlink:to="loc_us-gaap_EmployeeStockOptionMember_019c392d-4b59-7c14-8e48-87cf27c446b8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_019c392d-4b59-7bfc-bbbd-34f94c4235ab" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c392d-4b59-764f-aab6-6be18d680d3b" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_019c392d-4b59-7bfc-bbbd-34f94c4235ab" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_MilestoneAxis_019c392d-4b59-7310-806c-29ac0f51f7c1" xlink:href="smci-20260331.xsd#smci_MilestoneAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019c392d-4b59-728c-8f5d-40cf860fc051" xlink:to="loc_smci_MilestoneAxis_019c392d-4b59-7310-806c-29ac0f51f7c1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_MilestoneDomain_019c392d-4b59-7310-806c-29ac0f51f7c1_default" xlink:href="smci-20260331.xsd#smci_MilestoneDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_smci_MilestoneAxis_019c392d-4b59-7310-806c-29ac0f51f7c1" xlink:to="loc_smci_MilestoneDomain_019c392d-4b59-7310-806c-29ac0f51f7c1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_MilestoneDomain_019c392d-4b59-7fe7-bd61-92d166cf3e35" xlink:href="smci-20260331.xsd#smci_MilestoneDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_smci_MilestoneAxis_019c392d-4b59-7310-806c-29ac0f51f7c1" xlink:to="loc_smci_MilestoneDomain_019c392d-4b59-7fe7-bd61-92d166cf3e35" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_MilestoneOneMember_019c392d-4b59-77b1-bb94-e2dc98a81638" xlink:href="smci-20260331.xsd#smci_MilestoneOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_smci_MilestoneDomain_019c392d-4b59-7fe7-bd61-92d166cf3e35" xlink:to="loc_smci_MilestoneOneMember_019c392d-4b59-77b1-bb94-e2dc98a81638" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_MilestoneFiveMember_019c392d-4b59-7ebf-a42d-5668edb443b6" xlink:href="smci-20260331.xsd#smci_MilestoneFiveMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_smci_MilestoneDomain_019c392d-4b59-7fe7-bd61-92d166cf3e35" xlink:to="loc_smci_MilestoneFiveMember_019c392d-4b59-7ebf-a42d-5668edb443b6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_019c392d-4b59-751f-987d-19a1f9fa7e48" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-7b91-b74a-f0ff6659385c" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_019c392d-4b59-751f-987d-19a1f9fa7e48" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharePrice_019c392d-4b59-72f8-a3eb-d5a441e5ebfe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-7b91-b74a-f0ff6659385c" xlink:to="loc_us-gaap_SharePrice_019c392d-4b59-72f8-a3eb-d5a441e5ebfe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNumberOfVestingTranches_019c392d-4b59-7ceb-a385-b9090672570e" xlink:href="smci-20260331.xsd#smci_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNumberOfVestingTranches"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-7b91-b74a-f0ff6659385c" xlink:to="loc_smci_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNumberOfVestingTranches_019c392d-4b59-7ceb-a385-b9090672570e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_019c392d-4b59-7e74-9e87-8d1343b0da38" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-7b91-b74a-f0ff6659385c" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_019c392d-4b59-7e74-9e87-8d1343b0da38" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_019c392d-4b59-7009-b59d-2c668f483281" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-7b91-b74a-f0ff6659385c" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_019c392d-4b59-7009-b59d-2c668f483281" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_019c392d-4b59-738e-b405-f29e6b6d62fe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-7b91-b74a-f0ff6659385c" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_019c392d-4b59-738e-b405-f29e6b6d62fe" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_019c392d-4b59-7f02-a3dd-72aec429030f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-7b91-b74a-f0ff6659385c" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_019c392d-4b59-7f02-a3dd-72aec429030f" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.supermicro.com/role/StockbasedCompensationandStockholdersEquityScheduleofOperationalandStockPriceMilestonesDetails" xlink:type="simple" xlink:href="smci-20260331.xsd#StockbasedCompensationandStockholdersEquityScheduleofOperationalandStockPriceMilestonesDetails"/>
  <link:definitionLink xlink:role="http://www.supermicro.com/role/StockbasedCompensationandStockholdersEquityScheduleofOperationalandStockPriceMilestonesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-70fc-a81c-95326e712490" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019c392d-4b59-7dbd-a62b-31a046ffe6d3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-70fc-a81c-95326e712490" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019c392d-4b59-7dbd-a62b-31a046ffe6d3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_MilestoneAxis_019c392d-4b59-73cb-a22e-7491199cdb0b" xlink:href="smci-20260331.xsd#smci_MilestoneAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019c392d-4b59-7dbd-a62b-31a046ffe6d3" xlink:to="loc_smci_MilestoneAxis_019c392d-4b59-73cb-a22e-7491199cdb0b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_MilestoneDomain_019c392d-4b59-73cb-a22e-7491199cdb0b_default" xlink:href="smci-20260331.xsd#smci_MilestoneDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_smci_MilestoneAxis_019c392d-4b59-73cb-a22e-7491199cdb0b" xlink:to="loc_smci_MilestoneDomain_019c392d-4b59-73cb-a22e-7491199cdb0b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_MilestoneDomain_019c392d-4b59-7d1b-847b-fb918e04f6c6" xlink:href="smci-20260331.xsd#smci_MilestoneDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_smci_MilestoneAxis_019c392d-4b59-73cb-a22e-7491199cdb0b" xlink:to="loc_smci_MilestoneDomain_019c392d-4b59-7d1b-847b-fb918e04f6c6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_MilestoneOneMember_019c392d-4b59-7670-89aa-b5c732305360" xlink:href="smci-20260331.xsd#smci_MilestoneOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_smci_MilestoneDomain_019c392d-4b59-7d1b-847b-fb918e04f6c6" xlink:to="loc_smci_MilestoneOneMember_019c392d-4b59-7670-89aa-b5c732305360" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_MilestoneTwoMember_019c392d-4b59-7b06-86d0-777044ee3c31" xlink:href="smci-20260331.xsd#smci_MilestoneTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_smci_MilestoneDomain_019c392d-4b59-7d1b-847b-fb918e04f6c6" xlink:to="loc_smci_MilestoneTwoMember_019c392d-4b59-7b06-86d0-777044ee3c31" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_MilestoneThreeMember_019c392d-4b59-70a7-9b85-02a8fc9688d4" xlink:href="smci-20260331.xsd#smci_MilestoneThreeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_smci_MilestoneDomain_019c392d-4b59-7d1b-847b-fb918e04f6c6" xlink:to="loc_smci_MilestoneThreeMember_019c392d-4b59-70a7-9b85-02a8fc9688d4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_MilestoneFourMember_019c392d-4b59-7b2a-8fcc-10587d75c965" xlink:href="smci-20260331.xsd#smci_MilestoneFourMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_smci_MilestoneDomain_019c392d-4b59-7d1b-847b-fb918e04f6c6" xlink:to="loc_smci_MilestoneFourMember_019c392d-4b59-7b2a-8fcc-10587d75c965" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_MilestoneFiveMember_019c392d-4b59-749c-bf62-88f0152225ae" xlink:href="smci-20260331.xsd#smci_MilestoneFiveMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_smci_MilestoneDomain_019c392d-4b59-7d1b-847b-fb918e04f6c6" xlink:to="loc_smci_MilestoneFiveMember_019c392d-4b59-749c-bf62-88f0152225ae" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019c392d-4b59-7784-8264-f8a1bbc0b8b2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019c392d-4b59-7dbd-a62b-31a046ffe6d3" xlink:to="loc_us-gaap_AwardTypeAxis_019c392d-4b59-7784-8264-f8a1bbc0b8b2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c392d-4b59-7784-8264-f8a1bbc0b8b2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019c392d-4b59-7784-8264-f8a1bbc0b8b2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c392d-4b59-7784-8264-f8a1bbc0b8b2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c392d-4b59-778f-bd1b-704d9badba0b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019c392d-4b59-7784-8264-f8a1bbc0b8b2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c392d-4b59-778f-bd1b-704d9badba0b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_TwoThousandTwentyThreeCEOPerformanceAwardMember_019c392d-4b59-7904-8147-2a0737a9dfb2" xlink:href="smci-20260331.xsd#smci_TwoThousandTwentyThreeCEOPerformanceAwardMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c392d-4b59-778f-bd1b-704d9badba0b" xlink:to="loc_smci_TwoThousandTwentyThreeCEOPerformanceAwardMember_019c392d-4b59-7904-8147-2a0737a9dfb2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019c392d-4b59-776b-b3f1-c61018a46dcf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-70fc-a81c-95326e712490" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019c392d-4b59-776b-b3f1-c61018a46dcf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharePrice_019c392d-4b59-7d5a-949f-e4994e821268" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-70fc-a81c-95326e712490" xlink:to="loc_us-gaap_SharePrice_019c392d-4b59-7d5a-949f-e4994e821268" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsMarketPriceMilestoneNumberOfTradingDays_019c392d-4b59-7386-9c23-1a654b22311f" xlink:href="smci-20260331.xsd#smci_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsMarketPriceMilestoneNumberOfTradingDays"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-70fc-a81c-95326e712490" xlink:to="loc_smci_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsMarketPriceMilestoneNumberOfTradingDays_019c392d-4b59-7386-9c23-1a654b22311f" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.supermicro.com/role/StockbasedCompensationandStockholdersEquityScheduleofStockOptionActivityDetails" xlink:type="simple" xlink:href="smci-20260331.xsd#StockbasedCompensationandStockholdersEquityScheduleofStockOptionActivityDetails"/>
  <link:definitionLink xlink:role="http://www.supermicro.com/role/StockbasedCompensationandStockholdersEquityScheduleofStockOptionActivityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-75ce-aab1-cea6f42e1d48" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019c392d-4b59-762d-b3ca-d733b6f59bb9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-75ce-aab1-cea6f42e1d48" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019c392d-4b59-762d-b3ca-d733b6f59bb9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019c392d-4b59-7799-98d3-4188619a4efd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019c392d-4b59-762d-b3ca-d733b6f59bb9" xlink:to="loc_us-gaap_AwardTypeAxis_019c392d-4b59-7799-98d3-4188619a4efd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c392d-4b59-7799-98d3-4188619a4efd_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019c392d-4b59-7799-98d3-4188619a4efd" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c392d-4b59-7799-98d3-4188619a4efd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c392d-4b59-7969-9cb6-42399f78728f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019c392d-4b59-7799-98d3-4188619a4efd" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c392d-4b59-7969-9cb6-42399f78728f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_019c392d-4b59-7dfe-814f-04b38015af4d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c392d-4b59-7969-9cb6-42399f78728f" xlink:to="loc_us-gaap_EmployeeStockOptionMember_019c392d-4b59-7dfe-814f-04b38015af4d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_019c392d-4b59-79b2-b195-12bdd5747abd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-75ce-aab1-cea6f42e1d48" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_019c392d-4b59-79b2-b195-12bdd5747abd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_019c392d-4b59-7c6b-a2ac-83af13a21d8c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_019c392d-4b59-79b2-b195-12bdd5747abd" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_019c392d-4b59-7c6b-a2ac-83af13a21d8c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_019c392d-4b59-7b6f-a176-3fdc3ed7a4d4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_019c392d-4b59-79b2-b195-12bdd5747abd" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_019c392d-4b59-7b6f-a176-3fdc3ed7a4d4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_019c392d-4b59-7133-a608-6628d4e1bb57" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_019c392d-4b59-79b2-b195-12bdd5747abd" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_019c392d-4b59-7133-a608-6628d4e1bb57" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod_019c392d-4b59-7ec6-9f2c-4eaf05bf8a2b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_019c392d-4b59-79b2-b195-12bdd5747abd" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod_019c392d-4b59-7ec6-9f2c-4eaf05bf8a2b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_019c392d-4b59-77b9-873f-f7e7bb1ab989" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_019c392d-4b59-7499-a4d4-63a7e97a6167" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-75ce-aab1-cea6f42e1d48" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_019c392d-4b59-7499-a4d4-63a7e97a6167" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_019c392d-4b59-7e18-ae2e-c7892d527fce" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-75ce-aab1-cea6f42e1d48" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_019c392d-4b59-7e18-ae2e-c7892d527fce" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_019c392d-4b59-7cbb-ae2b-ff423ff12cc0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_019c392d-4b59-7e18-ae2e-c7892d527fce" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_019c392d-4b59-7cbb-ae2b-ff423ff12cc0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_019c392d-4b59-79b8-b142-ea2849afaedf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_019c392d-4b59-7e18-ae2e-c7892d527fce" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_019c392d-4b59-79b8-b142-ea2849afaedf" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_019c392d-4b59-7182-bac4-fd508e298763" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_019c392d-4b59-7e18-ae2e-c7892d527fce" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_019c392d-4b59-7182-bac4-fd508e298763" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice_019c392d-4b59-769a-9bb1-4b887537d6ff" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_019c392d-4b59-7e18-ae2e-c7892d527fce" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice_019c392d-4b59-769a-9bb1-4b887537d6ff" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_019c392d-4b59-7d1e-b67a-8c3b4ce8689e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_019c392d-4b59-74ad-b3df-c7e6537ea6b0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-75ce-aab1-cea6f42e1d48" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_019c392d-4b59-74ad-b3df-c7e6537ea6b0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019c392d-4b59-7853-b71c-affcc380c6e9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-75ce-aab1-cea6f42e1d48" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019c392d-4b59-7853-b71c-affcc380c6e9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_019c392d-4b59-7cee-b6d5-13a8c8f5f52b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019c392d-4b59-7853-b71c-affcc380c6e9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_019c392d-4b59-7cee-b6d5-13a8c8f5f52b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_019c392d-4b59-7a67-8018-b91ae9ae8a74" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-75ce-aab1-cea6f42e1d48" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_019c392d-4b59-7a67-8018-b91ae9ae8a74" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_019c392d-4b59-7c63-a689-0cd2be637828" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_019c392d-4b59-7a67-8018-b91ae9ae8a74" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_019c392d-4b59-7c63-a689-0cd2be637828" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_019c392d-4b59-772f-9212-69af32bd8252" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_019c392d-4b59-7a67-8018-b91ae9ae8a74" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_019c392d-4b59-772f-9212-69af32bd8252" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueAbstract_019c392d-4b59-7287-b02b-81bedad99ed5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-75ce-aab1-cea6f42e1d48" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueAbstract_019c392d-4b59-7287-b02b-81bedad99ed5" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_019c392d-4b59-7928-93c2-7bbb31903618" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueAbstract_019c392d-4b59-7287-b02b-81bedad99ed5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_019c392d-4b59-7928-93c2-7bbb31903618" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_019c392d-4b59-7970-b513-f5f7d1cafb12" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueAbstract_019c392d-4b59-7287-b02b-81bedad99ed5" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_019c392d-4b59-7970-b513-f5f7d1cafb12" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.supermicro.com/role/StockbasedCompensationandStockholdersEquityScheduleofRSUActivityDetails" xlink:type="simple" xlink:href="smci-20260331.xsd#StockbasedCompensationandStockholdersEquityScheduleofRSUActivityDetails"/>
  <link:definitionLink xlink:role="http://www.supermicro.com/role/StockbasedCompensationandStockholdersEquityScheduleofRSUActivityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-7856-83e5-19807328b092" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019c392d-4b59-75b4-a87b-9cd53c167b44" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-7856-83e5-19807328b092" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019c392d-4b59-75b4-a87b-9cd53c167b44" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019c392d-4b59-7d4d-b3cf-9fdc5415d44a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019c392d-4b59-75b4-a87b-9cd53c167b44" xlink:to="loc_us-gaap_AwardTypeAxis_019c392d-4b59-7d4d-b3cf-9fdc5415d44a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c392d-4b59-7d4d-b3cf-9fdc5415d44a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019c392d-4b59-7d4d-b3cf-9fdc5415d44a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c392d-4b59-7d4d-b3cf-9fdc5415d44a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c392d-4b59-72d9-b7a2-9b434e2dcd63" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019c392d-4b59-7d4d-b3cf-9fdc5415d44a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c392d-4b59-72d9-b7a2-9b434e2dcd63" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_019c392d-4b59-7cb3-8c8c-9e0a547c4ec4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c392d-4b59-72d9-b7a2-9b434e2dcd63" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_019c392d-4b59-7cb3-8c8c-9e0a547c4ec4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019c392d-4b59-712a-92d4-ebe1ff923958" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-7856-83e5-19807328b092" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019c392d-4b59-712a-92d4-ebe1ff923958" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_019c392d-4b59-7a18-ba33-07d08b05c8fe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019c392d-4b59-712a-92d4-ebe1ff923958" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_019c392d-4b59-7a18-ba33-07d08b05c8fe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019c392d-4b59-7602-af44-2ca6453ae74d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019c392d-4b59-712a-92d4-ebe1ff923958" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019c392d-4b59-7602-af44-2ca6453ae74d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReleasedInPeriod_019c392d-4b59-721f-b268-d46a544ee6c3" xlink:href="smci-20260331.xsd#smci_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReleasedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019c392d-4b59-712a-92d4-ebe1ff923958" xlink:to="loc_smci_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReleasedInPeriod_019c392d-4b59-721f-b268-d46a544ee6c3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_019c392d-4b59-757d-b0d2-ddef5a0a3e49" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019c392d-4b59-712a-92d4-ebe1ff923958" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_019c392d-4b59-757d-b0d2-ddef5a0a3e49" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_019c392d-4b59-744f-9550-6f816b432b56" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019c392d-4b59-720a-9e5d-53b4e8f54cfc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c392d-4b59-7856-83e5-19807328b092" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019c392d-4b59-720a-9e5d-53b4e8f54cfc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_019c392d-4b59-72ee-8a2a-5d4a1bc96e17" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019c392d-4b59-720a-9e5d-53b4e8f54cfc" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_019c392d-4b59-72ee-8a2a-5d4a1bc96e17" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_019c392d-4b59-7d63-9668-b5c03db3046d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019c392d-4b59-720a-9e5d-53b4e8f54cfc" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_019c392d-4b59-7d63-9668-b5c03db3046d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_ShareBasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsReleasedInPeriodWeightedAverageGrantDateFairValue_019c392d-4b59-7f69-ac70-4c2df235dfb1" xlink:href="smci-20260331.xsd#smci_ShareBasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsReleasedInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019c392d-4b59-720a-9e5d-53b4e8f54cfc" xlink:to="loc_smci_ShareBasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsReleasedInPeriodWeightedAverageGrantDateFairValue_019c392d-4b59-7f69-ac70-4c2df235dfb1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_019c392d-4b59-762a-bb2d-54c6f4c3e71e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019c392d-4b59-720a-9e5d-53b4e8f54cfc" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_019c392d-4b59-762a-bb2d-54c6f4c3e71e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_019c392d-4b59-7855-be31-2b84ade57cf6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.supermicro.com/role/CommitmentsandContingenciesDetails" xlink:type="simple" xlink:href="smci-20260331.xsd#CommitmentsandContingenciesDetails"/>
  <link:definitionLink xlink:role="http://www.supermicro.com/role/CommitmentsandContingenciesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PurchaseCommitmentExcludingLongtermCommitmentLineItems_019c392d-4b59-702b-95d2-2ff43db96275" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PurchaseCommitmentExcludingLongtermCommitmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PurchaseCommitmentExcludingLongtermCommitmentTable_019c392d-4b59-7ed6-a6c0-7b1ca14a6251" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PurchaseCommitmentExcludingLongtermCommitmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PurchaseCommitmentExcludingLongtermCommitmentLineItems_019c392d-4b59-702b-95d2-2ff43db96275" xlink:to="loc_us-gaap_PurchaseCommitmentExcludingLongtermCommitmentTable_019c392d-4b59-7ed6-a6c0-7b1ca14a6251" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_019e084b-340d-73b8-ab48-df324f200613" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_PurchaseCommitmentExcludingLongtermCommitmentTable_019c392d-4b59-7ed6-a6c0-7b1ca14a6251" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_019e084b-340d-73b8-ab48-df324f200613" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_019e084b-340d-73b8-ab48-df324f200613_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_019e084b-340d-73b8-ab48-df324f200613" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_019e084b-340d-73b8-ab48-df324f200613_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_019e084b-340d-72f0-8ff5-c994faad5d2c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_019e084b-340d-73b8-ab48-df324f200613" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_019e084b-340d-72f0-8ff5-c994faad5d2c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_019e084b-439b-7f30-b5ae-d6cd5b044475" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_019e084b-340d-72f0-8ff5-c994faad5d2c" xlink:to="loc_us-gaap_SubsequentEventMember_019e084b-439b-7f30-b5ae-d6cd5b044475" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c392d-4b59-732c-9d17-582e7128bab7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_PurchaseCommitmentExcludingLongtermCommitmentTable_019c392d-4b59-7ed6-a6c0-7b1ca14a6251" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c392d-4b59-732c-9d17-582e7128bab7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019c392d-4b59-732c-9d17-582e7128bab7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c392d-4b59-732c-9d17-582e7128bab7" xlink:to="loc_us-gaap_RelatedPartyDomain_019c392d-4b59-732c-9d17-582e7128bab7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019c392d-4b59-7732-889a-1937280dafe5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c392d-4b59-732c-9d17-582e7128bab7" xlink:to="loc_us-gaap_RelatedPartyDomain_019c392d-4b59-7732-889a-1937280dafe5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_019c392d-4b59-7e83-a20e-4d44b438a821" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019c392d-4b59-7732-889a-1937280dafe5" xlink:to="loc_us-gaap_RelatedPartyMember_019c392d-4b59-7e83-a20e-4d44b438a821" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_LitigationNumberOfEmployedOrAssociatedEmployeesInternallyInvestigated_019e084a-ec57-7052-91b2-af31d64aa568" xlink:href="smci-20260331.xsd#smci_LitigationNumberOfEmployedOrAssociatedEmployeesInternallyInvestigated"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PurchaseCommitmentExcludingLongtermCommitmentLineItems_019c392d-4b59-702b-95d2-2ff43db96275" xlink:to="loc_smci_LitigationNumberOfEmployedOrAssociatedEmployeesInternallyInvestigated_019e084a-ec57-7052-91b2-af31d64aa568" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PurchaseObligation_019c392d-4b59-7798-84c9-94c95e78b07d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PurchaseObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PurchaseCommitmentExcludingLongtermCommitmentLineItems_019c392d-4b59-702b-95d2-2ff43db96275" xlink:to="loc_us-gaap_PurchaseObligation_019c392d-4b59-7798-84c9-94c95e78b07d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_smci_PurchaseObligationLossAccrued_019c392d-4b59-7116-80a7-65de6433a4f9" xlink:href="smci-20260331.xsd#smci_PurchaseObligationLossAccrued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PurchaseCommitmentExcludingLongtermCommitmentLineItems_019c392d-4b59-702b-95d2-2ff43db96275" xlink:to="loc_smci_PurchaseObligationLossAccrued_019c392d-4b59-7116-80a7-65de6433a4f9" xlink:type="arc" order="2"/>
  </link:definitionLink>
</link:linkbase>
