▪ Brother (used before a first name when referring in writing to a member of a religious order of men): "Bro. Felix"
2. a male friend (often used as a form of address): North American"they'd never choose a girl over their bros"
▪ a young man, especially one who socializes primarily with his male peers and enjoys lively, unintellectual pursuits:"shirtless bros with plaid shorts throwing frisbees"
Word Originearly 16th century (as a written abbreviation): written or colloquial abbreviation of brother. Compare with Bros. bro (sense 2) dates from the mid 19th century.
