A four-wheeled vehicle for the transportation of goods, produce, etc.; a wagon. The wardens see nothing but a wain of hay. Jeffrey. Driving in ponderous wains their household goods to the seashore. Longfellow. A chariot. [Obs.] The Wain. (Astron.) See Charles's Wain, in the Vocabulary. -- Wain rope, a cart rope. Shak.