Apostasy in Judaism refers to the rejection of Judaism by a Jew and defection to another religion The term apostasy is derived from Greek ἀποστάτης, meaning "political rebel", as applied to rebellion against God and Judaism (Hebrew מרד). Expressions for apostate that are used by rabbinical scholars include mumar (מומר, literally "the one that changes"), poshea Yisrael (פושע ישראל, literally, "transgressor of Israel"), and kofer (כופר, literally "denier"). Similar terms are meshumad (משומד), one who has abandoned his faith, and min (מין) or apikorus (אפיקורוס), which denote the negation of God and Judaism, implying atheism.