Metal  —n. 1 a any of a class of workable elements such as gold, silver, iron, or tin, usu. Good conductors of heat and electricity and forming basic oxides. B alloy of any of these. 2 molten material for making glass. 3 (in pl.) Rails of a railway line. 4 = *road-metal. —adj. Made of metal. —v. (-ll-; us -l-) 1 make or mend (a road) with road-metal. 2 cover or fit with metal. [greek metallon mine]