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

      

    hook

     noun
    noun
    BrE BrE//hʊk//
     
    ; NAmE NAmE//hʊk//
     
    Cricket, Golf, Showing interest
     
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  1. 1  a curved piece of metal, plastic or wire for hanging things on, catching fish with, etc. a picture/curtain/coat hook a fish hook Hang your towel on the hook. The key was hanging from a hook. Your coat’s hanging on a hook behind the door. Wordfinderbait, bite, dragnet, fishing, fly, hook, line, net, rod, trawl see also boathook
  2. 2(in boxing) a short hard blow that is made with the elbow bent a left hook to the jaw
  3. 3(in cricket and golf) a way of hitting the ball so that it curves sideways instead of going straight ahead See related entries: Cricket, Golf
  4. 4a thing that is used to make people interested in something The images are used as a hook to get children interested in science. Well-chosen quotations can serve as a hook to catch the reader’s interest. See related entries: Showing interest
  5. Word Origin Old English hōc, of Germanic origin; related to Dutch hoek ‘corner, angle, projecting piece of land’, also to German Haken ‘hook’.Idioms using any method you can, even a dishonest one
    get (somebody) off the hook, let somebody off the hook
     
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    to free yourself or somebody else from a difficult situation or a punishment
    completely What I said was not true, but he fell for it (= believed it) hook, line and sinker. if you leave or take the telephone off the hook, you take the receiver (= the part that you pick up) off the place where it usually rests, so that nobody can call you See related entries: Making calls (usually used in the progressive tenses) (of a telephone) to ring many times The phone has been ringing off the hook with offers of help. (British English, informal) (used especially in orders) to go away
See the Oxford Advanced American Dictionary entry: hook