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English definition of “brains”

brains

noun  /breɪnz/ us  
[U] the most intelligent person in a group or the one who plans what a group will do: He was the brains behind the biggest art theft in recent times. [pl] Brains also means intelligence: An individual who has brains and foresight can make a lot of money in this business.
(Definition of brains from the Cambridge Academic Content Dictionary © Cambridge University Press)
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