vi to apostatize.
2. apostate ·noun one who, after having received sacred orders, renounces his clerical profession.
3. apostate ·adj pertaining to, or characterized by, apostasy; faithless to moral allegiance; renegade.
4. apostate ·noun one who has forsaken the faith, principles, or party, to which he before adhered; ·esp., one who has forsaken his religion for another; a pervert; a renegade.