Central part of the nervous system, as in the organ in the head that coordinates thoughts and activities which includes the forebrain, hindbrain, and midbrain;
e.g. The brain is the most important part of the body, being its neurological control center.
(noun)
of or being intellectual, or having an intellectual endowment;
e.g. She was known as the brain in the family.
(verb)
hit on the head or to kill by smashing the skull;
e.g. He got brained by a blunt object, resulting in a swift death.