What is the meaning of brain?

noun

• That part of the central nervous system that includes all the higher nervous centers; enclosed within the skull; continuous with the spinal cord.
  • synonyms: encephalon
• Mental ability.
  • usage: "he's got plenty of brains but no common sense"
  • synonyms: brainpower, learning ability, mental capacity, mentality, wit
• That which is responsible for one's thoughts and feelings; the seat of the faculty of reason.
  • usage: "his mind wandered"; "I couldn't get his words out of my head"
  • synonyms: mind, head, psyche, nous
• Someone who has exceptional intellectual ability and originality.
  • usage: "Mozart was a child genius"; "he's smart but he's no Einstein"
  • synonyms: genius, mastermind, brainiac, Einstein
• The brain of certain animals used as meat.

verb

• Hit on the head.
• Kill by smashing someone's skull. .