How do you spell Infidel

Available Definitions:
1) a. - Not holding the faith; -- applied esp. to one who does not believe in the inspiration of the Scriptures, and the supernatural origin of Christianity.
2) n. - One who does not believe in the prevailing religious faith; especially, one who does not believe in the divine origin and authority of Christianity; a Mohammedan; a heathen; a freethinker.