- boy [boi]n.[ME boie, servant, commoner, knave, boy < ? OFr embuié, one fettered < embuier, to chain < em-, EN-1 + L boiae, fetters, orig., leather collar for the neck < bos, ox, COW1]1. a male child from birth to the age of physical maturity; lad; youth2. a man regarded as immature or callow3. any man; fellow: familiar term4. a male domestic worker or servant: a patronizing term applied esp. by Caucasians to nonwhites5. a bellboy, messenger boy, etc.6. Informal a son [Mrs. Dill's oldest boy]interj.☆ Slang used to express pleasure, surprise, etc.: often oh, boy!
English World dictionary. V. Neufeldt. 2014.