A gun that propels a projectile by compressed air.

(fishing) A form of mechanical gun that fires a spear as a projectile; generally used under water when spearfishing.

plural of spear gun

A type of gun, similar to a modern machine gun, with several barrels on a rotating frame.

A type of fully automatic firearm that fires bullets in rapid succession by a single action of the trigger and is capable of sustained fire.

(sports) To begin a race too soon, before the starting gun goes off. / (idiomatic) To act or begin too soon or without due caution.

(informal) A new or rising talent or star; rising star.

A type of short range machine gun that is carried as a personal weapon and uses pistol ammunition.

(military) A large artillery gun or one of the largest-caliber naval guns (as on a battleship).

A small cannon attached to a swivel or pivot. It was usually located on a ship's rail so it could have a large range of fire, and could fire anything ranging from small round balls of lead to cannon balls.