brain - the brain of certain animals used as meat
brain, head, mind, nous, psyche - that which is responsible for one's thoughts and feelings; the seat of the faculty of reason
Example:- his mind wandered
brain, encephalon - that part of the central nervous system that includes all the higher nervous centers; enclosed within the skull; continuous with the spinal cord
brain, brainiac, Einstein, genius, mastermind - someone who has exceptional intellectual ability and originality
Example:- Mozart was a child genius
brain, brainpower, learning ability, mental capacity, mentality, wit - mental ability
Example:- he's got plenty of brains but no common sense