One who rejects religion; a professed unbeliever in whatever religion is locally regarded as true, as, from the Turkish viewpoint, a non-Mohammedan; in Christian communities, a non-Christian.
不信教的人;不信正教者;异教徒。如土耳其人眼中不信回教者,基督教地方的非基督徒。
A renegade.
叛教者。
In general, one who does not believe in something specified.