brain · noun C /breɪn/
brain (BODY PART)
A2 the body part inside your head that controls thought, memory, feelings and activity
Dictionary examples:
He studies the brain and nervous system.
The brain needs oxygen, which it gets from the blood circulating through it.
brain injury/damage
brain cells
Learner example:
The class starts at 3:00 and ends at 4:00. You don't need to bring any thing but yourself; your clothes and your brain. (Key English Test; A2; Thai)
brain (INTELLIGENCE)
C1 used to refer to intelligence
Dictionary examples:
She's the brains behind our software development.
Anybody with any brains would know better then to do that!
He has brains, looks, and good manners.
Learner example:
I would have to do my best to teach my children how to use their brains more instead of using technology system like computer. (Certificate in Advanced English; C1; French)