(n): any instrument or instrumentality used in fighting or hunting
(n): large but transportable armament
(n): weaponry used by military or naval force
(n): a person who shoots a gun (as regards their ability)
(n): a person who shoots (usually with respect to their ability to shoot)
(n): a professional killer who uses a gun
(n): a criminal who commits homicide (who performs the unlawful premeditated killing of another human being)
(n): a hand-operated pump that resembles a revolver; forces grease into parts of a machine
(n): a mechanical device that moves fluid or gas by pressure or suction
(n): a pedal that controls the throttle valve
(n): a lever that is operated with the foot
(n): the discharge of a firearm as signal or as a salute in military ceremonies
(n): the act of discharging a gun
(v): shoot with a gun
(v): fire a shot