n. In the middle ages, a close-fitting body-garment.n. A similar garment stuffed and quilted to form a garment of fence; a piece of armor, similar to the gambeson, worn by crossbowmen and foot-soldiers about 1475.n. A shaped, close-fitting body or waist, usually made of quilted satin jean, stiffened by strips of steel or whalebone, and so designed as to admit of tightening by lacing, worn chiefly by women to give shape and support to the figure; stays. Often in plural, corsets.To inclose in a corset.