1. plural of windmill: structures with rotating blades that harness wind power to generate electricity or grind grain

1. third person singular present of windmill: to rotate the arms in large circular motions like windmill blades
Usage: sports; informal

Examples

• The old windmills on the hill have been grinding grain for centuries.
• Modern windmills generate clean electricity for thousands of homes.
• Dutch windmills are famous tourist attractions.
• The wind farm contains dozens of tall white windmills.
• She windmills her arms when she gets excited.
• The pitcher windmills his arm before throwing the ball.
• Ancient windmills helped farmers process their wheat harvest.