A machine which translates linear motion of wind to rotational motion by means of adjustable vanes called sails. • The building or structure containing such machinery. • A wind turbine, a device for converting wind power into electricity. • A child's toy consisting of vanes mounted on a stick that rotate when blown by a person or by the wind. • A dunk where the dunker swings his arm in a circular motion before throwing the ball through the hoop. • A pitch where the pitcher swings his arm in a circular motion before throwing the ball. • A guitar move where the strumming hand mimics a turning windmill. • A breakdancing move in which the dancer rolls their torso continuously in a circular path on the floor, across the upper chest, shoulders and back, while twirling the legs in a V shape in the air. • Any of various muscle exercises in which a large deal of the body makes a great circle, typically one where a kettlebell is raised overhead and the torso is rotated to the other side with the hand reaching its foot (hitting the core, glutes, hamstrings, trapezius, rhomboids, deltoids and rotator cuffs) but sometimes even a windshield wiper. • Any of various large papilionid butterflies of the genus Byasa, the wings of which resemble the vanes of a windmill. • The false shower. • An imaginary enemy, but presented as real. • The act of windmilling. • A tactic in which a piece repeatedly gains material, while simultaneously creating an inescapable series of alternating direct and discovered checks.