gunmetal: Meaning and Definition of

gun•met•al

1. any of various alloys or metallic substances with a dark gray or blackish color or finish, used for chains, belt buckles, etc.
2. a dark gray with bluish or purplish tinge.
3. a bronze formerly much used for cannon.
4. an alloy of 88 percent copper, 10 percent tin, and 2 percent zinc, cast or machined for use in valves, gears, and other parts.