medallion /məˈdæljən/noun 5verb 1forms 3 noun5 •A large medal, usually decorative. •A cut of meat resembling a large medal. •A usually round or oval frame (often made of stucco) containing a decoration. •A circular certificate used in some places to register a vehicle, especially a taxicab. •A yellowish brown. verb1 •(literary) To mark with, or as with, a medallion or medallions. formsmedallioned · medallioning · medallions