Английский разговорный словарь (основной) - windmill

ˈwɪnmɪl n. 1 a mill worked by the action of the wind on its sails. 2 esp. Brit. a toy consisting of a stick with curved vanes attached that revolve in a wind. øthrow one's cap (or bonnet) over the windmill act recklessly or unconventionally. tilt at (or fight) windmills attack an imaginary enemy or grievance.