b home Adam Jason Cohen brother broth⋅er [bruhth-er] –noun 1. a male offspring having both parents in common with another offspring; a male sibling. 2. Also called half brother. a male offspring having only one parent in common with another offspring. 3. a stepbrother. 4. a male numbered among the same kinship group, nationality, race, profession, etc., as another; an associate; a fellow member, fellow countryman, fellow man, etc.: a fraternity brother. a b c d e f g h i j k l m n o p q r s t u v w x y z breeze breath brick bride buffalo bridge broken browse bubble brush brother bruise bul-bz