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English definition of “windmill”

windmill

noun [C] uk   /ˈwɪnd.mɪl/ us  
a building or structure with large blades on the outside that, when turned by the force of the wind, provide the power for getting water out of the ground or crushing grainGenerating and pumping devices a wind turbineGenerating and pumping devices (US also pinwheel) a child's toy that consists of a stick with brightly coloured pieces of plastic at one end which turn around when you blow them or hold the toy in the windToys and dolls
(Definition of windmill from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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