Apostate

A·pos·tate

Apostate

n.
  1. 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.
  2. One who, after having received sacred orders, renounces his clerical profession. (R. C. Ch.)

Apostate

a.
  1. Pertaining to, or characterized by, apostasy; faithless to moral allegiance; renegade.
    So spake the apostate angel.
    A wretched and apostate state.

Apostate

v. i.
  1. To apostatize. [Obs.]
    We are not of them which apostate from Christ.