- The definition of an apostasy is the act of leaving behind, or straying from, your religious or political beliefs or your principles.
An example of apostasy is when someone decides to become atheist.
Origin of apostasyMiddle English apostasie ; from Ecclesiastical Late Latin apostasia ; from Classical Greek apo-, away + stasis, a standing: see stasis
Origin of apostasyMiddle English apostasie, from Old French, from Late Latin apostasia, defection, from Late Greek apostasiā, from Greek apostasis, revolt, from aphistanai, aposta-, to revolt : apo-, apo- + histanai, to stand, place; see stā- in Indo-European roots.
From Latin apostasia, from Ancient Greek ἀποστασία (apostasia, “defection, revolt”), from ἀφίστημι (aphistēmi, “I withdraw, revolt”), from ἀπό (apo, “from”) + ἵστημι (histēmi, “I stand”)