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Definition of nut noun from the Oxford Advanced Learner's Dictionary

nut

noun
 
/nʌt/
 
/nʌt/
Idioms
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  1. (often in compounds) a small hard fruit with a very hard shell that grows on some trees
    • to crack a nut (= open it)
    • a cashew nut
    • a hazelnut
    • nuts and raisins
    • chopped nuts
    • She is allergic to nuts.
    • She has a severe nut allergy.
    • a nut roast/cutlet
    see also betel nut, cola nut, monkey nut, pine nutTopics Fooda2
    Oxford Collocations Dictionaryadjective
    • cashew
    • macadamia
    • pistachio
    verb + nut
    • crack
    • shell
    nut + noun
    • allergy
    • oil
    • tree
    See full entry
  2. a small piece of metal with a hole through the centre that is screwed onto a bolt to hold pieces of wood, parts of machines, etc. together
    • to tighten a nut
    • a wheel nut
    • a jar full of nuts and bolts
    see also lug nut, wing nutTopics Engineeringc2
    Oxford Collocations Dictionaryverb + nut
    • put on
    • screw on
    • tighten
    phrases
    • nuts and bolts
    See full entry
  3. (British English, slang) a person’s head or brain
  4. (British English also nutter)
    (informal, offensive) an offensive word for a person who you think is strange or crazy see also nuts, nutty
  5. (informal) (in compounds) a person who is extremely interested in a particular subject, activity, etc.
    • a fitness/tennis/computer nut
  6. nuts
    [plural] (slang) a man’s testicles
  7. Word OriginOld English hnutu, of Germanic origin; related to Dutch noot and German Nuss.
see also ginger nut
Idioms
do your nut
  1. (British English, informal) to become very angry
    • She’ll do her nut when she finds out!
a hard/tough nut
  1. (informal) a person who is difficult to deal with or to influence
a hard/tough nut (to crack)
  1. a difficult problem or situation to deal with
the nuts and bolts (of something)
  1. (informal) the basic practical details of a subject or an activity
    • The documentary focuses on the real nuts and bolts of the film-making process.
off your nut
  1. (British English, informal) crazy
use a sledgehammer to crack a nut
  1. to use more force than is necessary
See nut in the Oxford Advanced American DictionarySee nut in the Oxford Learner's Dictionary of Academic English
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