1.Definition: mental ability

"He's got plenty of brains but no common sense"

Related Noun(s):brainpower, mentality, wit

Category: General

2.Definition: someone who has exceptional intellectual ability and originality

Related Noun(s):brainiac, einstein, genius, mastermind

Category: People

3.Definition: that part of the central nervous system that includes all the higher nervous centers; enclosed within the skull; continuous with the spinal cord

Related Noun(s):encephalon

Category: General

4.Definition: that which is responsible for one's thoughts, feelings, and conscious brain functions; the seat of the faculty of reason

Related Noun(s):head, mind, nous, psyche

Category: General