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nut

 
 
/nʌt/ noun [C]

Definition

FOOD the dry fruit of some trees which grows in a hard shell, and can often be eaten: a brazil/cashew nut
METAL a piece of metal with a hole in it through which you put a bolt (= metal pin) to hold pieces of wood or metal together
KEEN informal a person who is keen on a particular subject or hobby: She's a real sports nut.
(Definition of nut noun from the Cambridge Learner's Dictionary © Cambridge University Press)

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