Definition of polyurethane
noun
[mass noun] a synthetic resin in which the polymer units are linked by urethane groups, used chiefly as constituents of paints, varnishes, adhesives, and foams: five coats of polyurethane [count noun]:polyurethanes serve a variety of uses
verb
[with object] (usually as adjective polyurethaned) coat with polyurethane paint or varnish: the sanded and polyurethaned floorboards
