D defs.my
Entry 1 sense Webster, 1913

Windmill

/wĭn'-dmĭlˌ/ · Wind·mill · IPA /ˈwɪn(d).mɪl/
01 n. 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.
  1. 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.