windmill

[ wind-mil ]
/ ˈwɪndˌmɪl /

noun

any of various machines for grinding, pumping, etc., driven by the force of the wind acting upon a number of vanes or sails.
(loosely) a wind generator; wind plant.
Aeronautics. a small air turbine with blades, like those of an airplane propeller, exposed on a moving aircraft and driven by the air, used to operate gasoline pumps, radio apparatus, etc.
an imaginary opponent, wrong, etc. (in allusion to Cervantes' Don Quixote): to tilt at windmills.

verb (used with or without object)

Aeronautics. (of a propeller engine or turbojet engine) to rotate or cause to rotate solely under the force of a passing airstream.

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Origin of windmill

Middle English word dating back to 1250–1300; see origin at wind1, mill1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for windmill

British Dictionary definitions for windmill

windmill
/ (ˈwɪndˌmɪl, ˈwɪnˌmɪl) /

noun

verb

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Idioms and Phrases with windmill

windmill

see tilt at windmills.

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.