brain

noun

• 1an organ of soft nervous tissue contained in the skull of vertebrates, functioning as the coordinating center of sensation and intellectual and nervous activity.
• (brains) the substance of an animal’s brain used as food.
• informal an electronic device with functions comparable to those of the human brain.

The human brain consists of three main parts. (i) The forebrain, greatly developed into the cerebrum, consists of two hemispheres joined by a bridge of nerve fibers, and is responsible for thought and control of speech. (ii) The midbrain, the upper part of the tapering brainstem, contains cells involved in eye movements. (iii) The hindbrain, the lower part of the brainstem, contains cells responsible for breathing and for regulating heart action, the flow of digestive juices, and other unconscious actions and processes. The cerebellum, which lies behind the brain stem, plays an important role in the execution of highly skilled movements

• 2intellectual capacity:I didn’t have enough brains for the sciences success requires brain as well as brawn
• (the brains) informal a clever person who supplies the ideas and plans for a group of people:Tom was the brains of the outfit
• a person’s mind:a tiny alarm bell began to ring in her brain
• an exceptionally intelligent person:he was known more as a snappy dresser than a brain

verb

• hit (someone) hard on the head with an object:she brained me with a rolling pin