n a weapon that discharges a missile at high velocity (especially from a metal tube or barrel)
n large but transportable armament
n a person who shoots a gun (as regards their ability)
n a professional killer who uses a gun
n a hand-operated pump that resembles a revolver; forces grease into parts of a machine
n a pedal that controls the throttle valve
n the discharge of a firearm as signal or as a salute in military ceremonies
v shoot with a gun