tilt at windmills
Variant of windmill
- a mill operated by the wind's rotation of large, oblique sails or vanes radiating from a shaft: used as a source of power for grinding grain, pumping water, generating electricity, etc.
- anything like a windmill, as a propellerlike toy (pinwheel) revolved by wind
to rotate like a windmill
fight windmillsor tilt at windmills
to fight imaginary evils or opponents: from Don Quixote's charging at windmills under the delusion that they were giants