gun

(noun) a weapon that discharges a missile at high velocity (especially from a metal tube or barrel).

(noun) large but transportable armament. Synonyms: artillery, heavy weapon, ordnance.

(noun) a person who shoots a gun (as regards their ability). Synonyms: gunman.

(noun) a professional killer who uses a gun. Synonyms: gunman, gunslinger, hired gun, gun for hire, triggerman, hit man, hitman, torpedo, shooter.

(noun) a hand-operated pump that resembles a revolver; forces grease into parts of a machine. Synonyms: grease-gun.

(noun) a pedal that controls the throttle valve. Synonyms: accelerator, accelerator pedal, gas pedal, gas, throttle. Examples: "He stepped on the gas."

(noun) the discharge of a firearm as signal or as a salute in military ceremonies. Examples: "Two runners started before the gun." "A twenty gun salute."

(verb) shoot with a gun.