Meaning

noun a person who does not acknowledge your god

noun a person who is not a member of one's own religion; used in this sense by Mormons and Hindus

noun a Christian as contrasted with a Jew

originBorrowed from French gentil (“gentile”), from Latin gentīlis (“of or belonging to the same people or nation”), morphologically from gēns (“clan; tribe; people, family”) + adjective suffix -īlis (“-ile”). Doublet of gentle, genteel, jaunty, and Gentoo. See also gens, gender, genus, and generation.

Etymology from Wiktionary, CC BY-SA 3.0