Respuesta :

1) A building with sails or vanes that turn in the wind and generate power to grind grain into flour. (noun)

2) (with reference to a person's arms) move or be moved around in a circle in a manner suggestive of the rotating sails or vanes of a windmill. (verb)
A windmill is a mill that converts the energy of wind into rotational energy by means of vanes called sails or blades.

Hope this helps!