BRAIN
—none. 1 organ of soft nervous tissue in the skull of vertebrates, the centre of sensation and of intellectual and nervous activity. 2 a colloq. Intelligent person. B (often in plural.) Intelligence. 3 (usually. In pl.; prec. By the) colloq. Cleverest person in a group; mastermind. 4 electronic device functioning like a brain. —verb. 1 dash out the brains of. 2 colloq. Strike hard on the head. ? on the brain colloq. Obsessively in one`s thoughts. [old english]