Noun

• S: (n) 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)
• S: (n) brain, brainpower, learning ability, mental capacity, mentality, wit (mental ability) "he's got plenty of brains but no common sense"
• S: (n) mind, head, brain, psyche, nous (that which is responsible for one's thoughts, feelings, and conscious brain functions; the seat of the faculty of reason) "his mind wandered"; "I couldn't get his words out of my head"
• S: (n) genius, mastermind, brain, brainiac, Einstein (someone who has exceptional intellectual ability and originality) "Mozart was a child genius"; "he's smart but he's no Einstein"
• S: (n) brain (the brain of certain animals used as meat)

Verb

• S: (v) brain (hit on the head)
• S: (v) brain (kill by smashing someone's skull)