gun

a hand-operated pump that resembles a pistol; forces grease into parts of a machine

large but transportable armament

a person who shoots a gun (as regards their ability)

a pedal that controls the throttle valve

a professional killer who uses a gun

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

shoot with a gun

the discharge of a firearm as signal or as a salute in military ceremonies

“two runners started before the gun”