Definitions for: Windmill

[n] generator that extracts usable energy from winds
[n] a mill that is powered by the wind

Webster (1913) Definition: Wind"mill`, 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. --Chaucer.

Synonyms: aerogenerator, wind generator

See Also: blade, generator, grinder, mill, vane