<?xml version="1.0" encoding="US-ASCII"?>
<!-- Generated by Broadridge Transform (tm) - http://www.broadridge.com -->
<!-- Created: Thu Oct 08 15:54:02 UTC 2026 -->
<linkbase xmlns="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns:xbrldt="http://xbrl.org/2005/xbrldt">
  <roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/spac/2026/spac-2026.xsd#SponsorsAffiliatesOrPromotersOnly" roleURI="http://xbrl.sec.gov/spac/role/SponsorsAffiliateOrPromotersOnly"/>
  <roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/spac/2026/spac-2026.xsd#SecurityClassesOnly" roleURI="http://xbrl.sec.gov/spac/role/SecurityClassesOnly"/>
  <roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/spac/2026/spac-2026.xsd#DilutionSourcesOnly" roleURI="http://xbrl.sec.gov/spac/role/DilutionSourcesOnly"/>
  <roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/spac/2026/spac-2026.xsd#DirectAndIndirectMaterialInterestHoldersOnly" roleURI="http://xbrl.sec.gov/spac/role/DirectAndIndirectMaterialInterestHoldersOnly"/>
  <roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/spac/2026/spac-2026.xsd#CompensationNaturesOnly" roleURI="http://xbrl.sec.gov/spac/role/CompensationNaturesOnly"/>
  <arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default" arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default"/>
  <arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain" arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain"/>
  <arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension" arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension"/>
  <arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member" arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member"/>
  <arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all" arcroleURI="http://xbrl.org/int/dim/arcrole/all"/>
  <definitionLink xlink:role="http://xbrl.sec.gov/spac/role/SponsorsAffiliateOrPromotersOnly" xlink:type="extended">
    <loc xlink:type="locator" xlink:label="spac_AllSpacSponsorsAffiliatesOrPromotersMember" xlink:href="https://xbrl.sec.gov/spac/2026/spac-2026.xsd#spac_AllSpacSponsorsAffiliatesOrPromotersMember"/>
    <loc xlink:type="locator" xlink:label="emac_EssentialMineralsSponsorLLCMember" xlink:href="emac-20261008.xsd#emac_EssentialMineralsSponsorLLCMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="spac_AllSpacSponsorsAffiliatesOrPromotersMember" xlink:to="emac_EssentialMineralsSponsorLLCMember" order="13" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="emac_WorkingCapitalMember" xlink:href="emac-20261008.xsd#emac_WorkingCapitalMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="spac_AllSpacSponsorsAffiliatesOrPromotersMember" xlink:to="emac_WorkingCapitalMember" order="14" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="us-gaap_OverAllotmentOptionMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OverAllotmentOptionMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="spac_AllSpacSponsorsAffiliatesOrPromotersMember" xlink:to="us-gaap_OverAllotmentOptionMember" order="15" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="spac_OverAllotmentOptionExercisedMember" xlink:href="https://xbrl.sec.gov/spac/2026/spac-2026.xsd#spac_OverAllotmentOptionExercisedMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="spac_AllSpacSponsorsAffiliatesOrPromotersMember" xlink:to="spac_OverAllotmentOptionExercisedMember" order="16" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="emac_SponsorMember" xlink:href="emac-20261008.xsd#emac_SponsorMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="spac_AllSpacSponsorsAffiliatesOrPromotersMember" xlink:to="emac_SponsorMember" order="17" xbrldt:closed="true"/>
  </definitionLink>
  <definitionLink xlink:role="http://xbrl.sec.gov/spac/role/SecurityClassesOnly" xlink:type="extended">
    <loc xlink:type="locator" xlink:label="spac_AllSecurityClassesMember" xlink:href="https://xbrl.sec.gov/spac/2026/spac-2026.xsd#spac_AllSecurityClassesMember"/>
    <loc xlink:type="locator" xlink:label="emac_OfferingPriceOf1000PerUnitMember" xlink:href="emac-20261008.xsd#emac_OfferingPriceOf1000PerUnitMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="spac_AllSecurityClassesMember" xlink:to="emac_OfferingPriceOf1000PerUnitMember" order="17" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="emac_NetProceedsFromThisOfferingAndTheSaleOfPrivatePlacementUnitsMember" xlink:href="emac-20261008.xsd#emac_NetProceedsFromThisOfferingAndTheSaleOfPrivatePlacementUnitsMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="spac_AllSecurityClassesMember" xlink:to="emac_NetProceedsFromThisOfferingAndTheSaleOfPrivatePlacementUnitsMember" order="18" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="emac_PlusOfferingCostsAccruedForOrPaidInAdvanceExcludedFromTangibleBookValueMember" xlink:href="emac-20261008.xsd#emac_PlusOfferingCostsAccruedForOrPaidInAdvanceExcludedFromTangibleBookValueMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="spac_AllSecurityClassesMember" xlink:to="emac_PlusOfferingCostsAccruedForOrPaidInAdvanceExcludedFromTangibleBookValueMember" order="19" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="emac_LessOverallotmentLiabilityMember" xlink:href="emac-20261008.xsd#emac_LessOverallotmentLiabilityMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="spac_AllSecurityClassesMember" xlink:to="emac_LessOverallotmentLiabilityMember" order="20" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="emac_LessDeferredUnderwritingCommissionMember" xlink:href="emac-20261008.xsd#emac_LessDeferredUnderwritingCommissionMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="spac_AllSecurityClassesMember" xlink:to="emac_LessDeferredUnderwritingCommissionMember" order="21" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="emac_LessRedemptionsMember" xlink:href="emac-20261008.xsd#emac_LessRedemptionsMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="spac_AllSecurityClassesMember" xlink:to="emac_LessRedemptionsMember" order="22" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="emac_OrdinarySharesForfeitedIfOverallotmentIsNotExercisedMember" xlink:href="emac-20261008.xsd#emac_OrdinarySharesForfeitedIfOverallotmentIsNotExercisedMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="spac_AllSecurityClassesMember" xlink:to="emac_OrdinarySharesForfeitedIfOverallotmentIsNotExercisedMember" order="23" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="emac_OrdinarySharesOfferedMember" xlink:href="emac-20261008.xsd#emac_OrdinarySharesOfferedMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="spac_AllSecurityClassesMember" xlink:to="emac_OrdinarySharesOfferedMember" order="24" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="emac_PrivatePlacementSharesMember" xlink:href="emac-20261008.xsd#emac_PrivatePlacementSharesMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="spac_AllSecurityClassesMember" xlink:to="emac_PrivatePlacementSharesMember" order="25" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="emac_LessOrdinarySharesRedeemedMember" xlink:href="emac-20261008.xsd#emac_LessOrdinarySharesRedeemedMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="spac_AllSecurityClassesMember" xlink:to="emac_LessOrdinarySharesRedeemedMember" order="26" xbrldt:closed="true"/>
  </definitionLink>
  <definitionLink xlink:role="http://xbrl.sec.gov/spac/role/DilutionSourcesOnly" xlink:type="extended">
    <loc xlink:type="locator" xlink:label="spac_AllDilutionSourcesMember" xlink:href="https://xbrl.sec.gov/spac/2026/spac-2026.xsd#spac_AllDilutionSourcesMember"/>
    <loc xlink:type="locator" xlink:label="emac_NoOverAllotmentMember" xlink:href="emac-20261008.xsd#emac_NoOverAllotmentMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="spac_AllDilutionSourcesMember" xlink:to="emac_NoOverAllotmentMember" order="23" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="emac_FullOverAllotmentMember" xlink:href="emac-20261008.xsd#emac_FullOverAllotmentMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="spac_AllDilutionSourcesMember" xlink:to="emac_FullOverAllotmentMember" order="24" xbrldt:closed="true"/>
  </definitionLink>
  <definitionLink xlink:role="http://xbrl.sec.gov/spac/role/DirectAndIndirectMaterialInterestHoldersOnly" xlink:type="extended">
    <loc xlink:type="locator" xlink:label="spac_AllSpacSponsorDirectAndIndirectMaterialInterestHoldersMember" xlink:href="https://xbrl.sec.gov/spac/2026/spac-2026.xsd#spac_AllSpacSponsorDirectAndIndirectMaterialInterestHoldersMember"/>
    <loc xlink:type="locator" xlink:label="emac_MrHayesMember" xlink:href="emac-20261008.xsd#emac_MrHayesMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="spac_AllSpacSponsorDirectAndIndirectMaterialInterestHoldersMember" xlink:to="emac_MrHayesMember" order="13" xbrldt:closed="true"/>
  </definitionLink>
  <definitionLink xlink:role="http://xbrl.sec.gov/spac/role/CompensationNaturesOnly" xlink:type="extended">
    <loc xlink:type="locator" xlink:label="spac_AllCompensationNaturesMember" xlink:href="https://xbrl.sec.gov/spac/2026/spac-2026.xsd#spac_AllCompensationNaturesMember"/>
    <loc xlink:type="locator" xlink:label="emac_PrivatePlacementUnitsMember" xlink:href="emac-20261008.xsd#emac_PrivatePlacementUnitsMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="spac_AllCompensationNaturesMember" xlink:to="emac_PrivatePlacementUnitsMember" order="17" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="emac_UnderwritersOverallotmentOptionExercisedMember" xlink:href="emac-20261008.xsd#emac_UnderwritersOverallotmentOptionExercisedMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="spac_AllCompensationNaturesMember" xlink:to="emac_UnderwritersOverallotmentOptionExercisedMember" order="18" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="emac_UnderwritersOverAllotmentOptionMember" xlink:href="emac-20261008.xsd#emac_UnderwritersOverAllotmentOptionMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="spac_AllCompensationNaturesMember" xlink:to="emac_UnderwritersOverAllotmentOptionMember" order="19" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="emac_ClassBOrdinarySharesMember" xlink:href="emac-20261008.xsd#emac_ClassBOrdinarySharesMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="spac_AllCompensationNaturesMember" xlink:to="emac_ClassBOrdinarySharesMember" order="20" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="emac_ClassBOrdinarySharesSurrenderMember" xlink:href="emac-20261008.xsd#emac_ClassBOrdinarySharesSurrenderMember"/>
<!-- [WMV7][0GKk/hP6ltT7PxV5hiij4TuwTnaUjL7OkpSy2ypBKFyoIQPsevXC4pLYjcqX3jT+qPBafSs5mgMi5ArsgbESnbBcaPDGV73C7GM5GgeOf3zXBowOtPoxthrznDeZRM/PblJ4Pvac0HrK8fIhW+XpLeMzZN5Ub5T08vQkHuBoJQeDqP9R0FVIRJDxNE9kl6gspZRGfWYh/7jskLxF8m37Dl9W5q+MxHsqPFoFIf2dCaoeWy4hDpu/I4TwlU/BaQpj+SkBa9JUyKbvJy3rq1ZrlEDPBXr42KBeJiizLu8qaJutubuVRzh9VD2Ej4Ti+HAHw+wUifVZGUbxq1DWaiP7zHyjiG97IdjUCHiEcBvxokhttjGlTImZ] CSR-->
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="spac_AllCompensationNaturesMember" xlink:to="emac_ClassBOrdinarySharesSurrenderMember" order="21" xbrldt:closed="true"/>
  </definitionLink>
</linkbase>
