Definition of watermill noun from the Oxford Advanced American Dictionary

 

watermill

 noun
noun
NAmE//ˈwɔt̮ərˌmɪl//
 
, NAmE//ˈwɑt̮ərˌmɪl//
 
 
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a mill next to a river in which the machinery for grinding grain into flour is driven by the power of the water turning a wheel
See the Oxford Advanced Learner's Dictionary entry: watermill