An electrically or pneumatically powered gun used to drive nails into a surface.

(informal) A tattoo machine.

(historical) A firearm that has a needle-like firing pin.

(chiefly historical) A very large shotgun used in the 19th and early 20th centuries for shooting large numbers of waterfowl for commercial harvesting operations and private sport.

(military) At military posts, a gun fired at the first note of reveille; the firing of this gun.

(military) The firing of a gun after the last note of the retreat, signalling the lowering of the flag at sunset; the gun thus fired.

plural of gun-brig

(nautical) A small two-masted vessel during the Age of Sail, typically carrying 12 guns, comprising two long guns in the chase position and ten carronades on the broadsides.

plural of gun lobby

(Australia, informal) A small-bore shotgun, or rifle firing rat shot, used to defend against snakes.