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| Language: | Old English |
| Origin: | brægen |
Related topics:
1 the organ inside your head that controls how you think, feel, and move : 
Messages from the brain are carried by the central nervous system.the chemistry of the brain the human brain
organ
[countable]HBHHBMessages from the brain are carried by the central nervous system.the chemistry of the brainthe human brain the right/left hemisphere of the brain (=the right or left side of the brain) Emotional responses are a function of the right hemisphere of the brain.
Emotional responses are a function of the right hemisphere of the brain.2 the ability to think clearly and learn quickly : If you had any brains, you'd know what I meant. The job requires brains.
intelligence
[countable usually plural, uncountable]If you had any brains, you'd know what I meant.The job requires brains.3 someone who is intelligent, with good ideas and useful skills : Some of our best brains are leaving the country to work in the US. ➔ brain drain
person
[countable usually plural] informalSome of our best brains are leaving the country to work in the US.4 the brain of an animal, used as food
food
[uncountable] also brains [plural]5 to be always thinking about something : I've got that song on the brain today.
have something on the brain
informalI've got that song on the brain today.6 to be the person who thought of and developed a particular plan, system, or organization, especially a successful one : Danny's definitely the brains of the project.
be the brains behind/of something
Danny's definitely the brains of the project.7
brain dead
a) MI in a state where your brain has stopped working properly even though your heart may still be beating
b) informal in a state in which you seem stupid or uninteresting, especially because you live a boring life or are very tired
➔ bird-brain, hare-brained
