brain Meaning in the Cambridge English Dictionary
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Meaning of “brain” in the English Dictionary

"brain" in British English

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brainnoun

uk   us   /breɪn/
A2 [C] the ​organ inside the ​head that ​controlsthought, ​memory, ​feelings, and ​activity: Doctors ​trieddesperately to ​reduce the ​swelling in her brain. The ​accidentleft him with ​permanent brain damage. His ​wifedied from a brain tumour.C1 [C] used to refer to ​intelligence: Marie has an ​amazing brain (= is very ​intelligent). That can't ​possibly be the ​right way to do it - useyour brain! The ​poorchildinherited his mother's brains and his father's ​looks. He's got brains but he's too ​lazy to use them (= he is ​intelligent but ​lazy). [C usually plural] informal a very ​intelligentperson, ​especially one who has ​spent a lot of ​timestudying: We have the ​best brains in the ​landworking on this ​problem.the brains [S] the most ​intelligentperson in a ​group, ​especially the ​person who ​plans what the ​group will do: My little brother's the brains of the ​family.
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brainverb [T]

uk   us   /breɪn/ informal
to ​hit someone on the ​head: I'll brain you if you don't ​keepquiet.
(Definition of brain from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"brain" in American English

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brainnoun [C]

 us   /breɪn/
the ​organ inside the ​head that ​controlsthought, ​memory, ​feelings, and ​physicalactivity: a brain ​tumor brain ​surgery They ​foundfracturedribs, other ​boneinjuries, and brain ​damage. infml A brain is also a very ​intelligentperson: We’ve got the ​best brains in the ​countryworking on this ​problem.
(Definition of brain from the Cambridge Academic Content Dictionary © Cambridge University Press)

"brain" in Business English

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brainnoun

uk   us   /breɪn/ informal
[C, usually plural] a very ​intelligentperson: We've got the best brains in the ​industryworking on the ​cars.
the brains [S] the ​personresponsible for the ​planning and ​management of an ​activity or ​organization: the brains behind sth He is the brains behind the corporation's ​success.
(Definition of brain from the Cambridge Business English Dictionary © Cambridge University Press)
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