brain Meaning in the Cambridge English Dictionary
Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

Meaning of “brain” in the English Dictionary

"brain" in British English

See all translations

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.
More examples

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

See all translations

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

See all translations

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)
What is the pronunciation of brain?
Add Cambridge dictionaries to your browser to your website
Word of the Day

harvest

to pick and collect crops, or to collect plants, animals, or fish to eat

Word of the Day

Meerkat meme
Meerkat meme
by Colin McIntosh,
September 03, 2015
Meerkats are not new to popular culture (they appear in the folk tales of the San people of the Kalahari), but their arrival in the public’s consciousness, at least in the UK and the US, is a relatively recent phenomenon. Meerkats are small, sociable Southern African mammals that live in large family

Read More 

parklet noun
parklet noun
August 31, 2015
a public outdoor space that may be associated with a local business but where anyone can sit Pop-up cafes in NY are what’s actually called parklets in many other places around the country.

Read More