Definition of belt noun from the Oxford Advanced American Dictionary

      

    belt

     noun
    noun
    NAmE//bɛlt//
     
     
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  1. 1a long narrow piece of leather, cloth, etc. that you wear around the waist to buckle/fasten/tighten a belt a belt buckle see also black belt, seat belt
  2. 2a continuous band of material that moves around and is used to carry things along, or to drive machinery see also conveyor belt, fan belt
  3. 3 an area with particular characteristics or where a particular group of people live the country's corn/sun belt a belt of rain moving across the country see also Bible Belt, green belt
  4. 4 (informal) an act of hitting something or someone hard She gave the ball a huge belt.
  5. Idioms
    below the belt
     
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    (of a remark) unfair or cruel That really hit him below the belt!
    have something under your belt(informal)
     
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    to have already achieved or obtained something She already has a couple of good wins under her belt.
    tighten your belt
     
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    to spend less money because there is less available My parents really had to tighten their belts after my mother retired. see also belt-tightening
See the Oxford Advanced Learner's Dictionary entry: belt