Webster's English Dictionary

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gun

1. gun \'g*n\ \'g*nd\ n [ME gonne, gunne] 1a: a piece of ordnance usu. with 
   high muzzle velocity and comparatively fl at trajectory 1b: a portable 
   firearm (as a rifle, pistol)  1c: a device that throws a projection  2a: a 
   discharge of a gun  2b: a signal marking a beginning or ending  3: one who 
   is skilled with a gun  4: something suggesting a gun in shape or function  
   5: THROTTLE  - gunned aj
2. gun vb or gunned;  or gun.ning : to hunt with a gun  1a: to fire on  1b: 
   SHOOT  2: to open up the throttle of so as to increase speed {~ the engin 
   e}