Definition of "gun-metal" [gun-metal]

• A bronze formerly much employed for cannon, especially for light field-artillery. It is now nearly supplanted by steel. See bronze. (noun)

The Century Dictionary (Public Domain)

• "She couldn't see the barge of gun-metal clouds, the lifeless fire ants under her feet, or that it was time to go home."
• "What made this pas de deux so vivid, besides the extraordinary, ice-green lighting of Jennifer Tipton, especially on the female dancer's gun-metal gray tunic by Santo Loquasto, was the grand yet throwaway dancing of Gillian Murphy: Imagine a Valkyrie on a romp."
• "His original title was "Pale Blue and Green," a rather gentle description for the bleak industrial wasteland that serves not so much as the story's backdrop as its foreground: a depopulated landscape of rusted red, sulfurous yellow, gun-metal gray and sterile white."