From gun + metal
gunmetal (countable and uncountable, plural gunmetals)
- an alloy of 88% copper, 10% tin and 2% zinc, originally used for making guns
- 1956, James Baldwin, Giovanni’s Room, Penguin, 2001, Part Two, Chapter 3,
- It is three tiers high inside the prison and everything is the color of gunmetal. Everything is dark and cold, except for those patches of light, where authority stands.
- a dark grey colour
an alloy of 88% copper, 10% tin and 2% zinc