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. [ 1913 Webster ]
[ひとりずもう, hitorizumou](exp) (1) fighting (tilting at) windmills; working oneself up even though there really isn't anything to fight at; (2) single-person mimicking a wrestling match[Add to Longdo]