gun in WordNet English dictionary

1. a pedal that controls the throttle valve
   "he stepped on the gas"
   accelerator  accelerator pedal  gas pedal  gas  throttle  gun 
   
2. large but transportable armament
   artillery  heavy weapon  gun  ordnance 
   
3. a hand-operated pump that resembles a revolver; forces grease into parts of a machine
   grease-gun  gun 
   
4. the discharge of a firearm as signal or as a salute in military ceremonies
   "two runners started before the gun"; "a twenty gun salute"
   gun 
   
5. a weapon that discharges a missile at high velocity (especially from a metal tube or barrel)
   gun 
   
6. a professional killer who uses a gun
   gunman  gunslinger  hired gun  gun  gun for hire  triggerman  hit man  hitman  torpedo  shooter 
   
7. a person who shoots a gun (as regards their ability)
   gunman  gun 
   

1. shoot with a gun
   gun