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Definition of windmill noun from the Oxford Advanced American Dictionary

     

    windmill

     noun
    noun
    NAmE//ˈwɪndmɪl//
     
     
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  1. 1a building with machinery for grinding grain into flour that is driven by the power of the wind turning long arms (calledsail)
  2. 2a tall thin structure with parts that turn around, used to change the power of the wind into electricity
    3. Idioms
    tilt at windmills
     
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    to waste your energy attacking imaginary enemies From Cervantes' novel Don Quixote, in which the hero thought that the windmills he saw were giants and tried to fight them.
See windmill in the Oxford Advanced Learner's Dictionary
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