Gail \gail\ as a girl's name (also used as boy's name Gail), is pronounced gayl. It is of Hebrew origin, and the meaning of Gail is "father of exaltation". Short form of Abigail. Gael is a term for descendants of the ancient Celts, especially in Scotland, Ireland, and the Isle of Man. Authors Gael Greene, Gail Sheehy, Gail Godwin; track celebrity Gail Devers.