1. A machine that runs on the energy generated by a wheel of adjustable blades or slats rotated by the wind.
2. something, such as a toy pinwheel, that is similar to a windmill in appearance or operation.
3. to move or cause to move like the wheel of a windmill; rotate sweepingly.
4. tilt at windmills to confront and engage in conflict with an imagined opponent or threat.

1. A machine which translates linear motion of wind to rotational motion by means of adjustable vanes called sails.
2. the structure containing such machinery.
3. A child's toy consisting of vanes mounted on a stick that rotate when blown by a person or by the wind.
4. A dunk where the dunker swings his arm in a circular motion before throwing the ball through the hoop.
5. A guitar move where the strumming hand mimics a turning windmill.
6. the false shower.
7. to rotate (itself) with a sweeping motion.
8. of a rotating part of a machine, to (become disengaged and) rotate freely.

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.

1. A mill or machine for grinding, pumping, or other purposes, moved by the wind; a wind-motor; any form of motor for utilizing the pressure of the wind as a motive power.
2. A visionary scheme; a vain project; a fancy; a chimera.

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