<p><strong>Noun</strong></p><ul><li>any of various alloys or metallic substances with a dark gray or blackish color or finish, used for chains, belt buckles, etc.</li><li>Also called gunmetal gray.</li><li>a dark gray with bluish or purplish tinge.</li><li>a bronze formerly much used for cannon.</li><li>an alloy of 88 percent copper, 10 percent tin, and 2 percent zinc, cast or machined for use in valves, gears, and other parts.</li></ul>