windmill Meaning, Definition & Usage

  1. noun a mill that is powered by the wind
  2. noun generator that extracts usable energy from winds
    aerogenerator; wind generator.

WordNet


Wind"mill` noun
Definitions
  1. A mill operated by the power of the wind, usually by the action of the wind upon oblique vanes or sails which radiate from a horizontal shaft. Chaucer.

Webster 1913