noun, plural apostasies.
1. a total desertion of or departure from one's religion, principles, party, cause, etc.
Origin: 1350-1400; Middle English apostasye (< Anglo-French) < Late Latin apostasia < Greek: a standing away, withdrawing, equivalent to apóstas (is) ( apo- apo- + sta- stand + -sis -sis ) + -ia -ia
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