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English definition of “gun”

gun

noun [C] uk   /ɡʌn/ us  
B1 a weapon that bullets or shells (= explosive containers) are fired from: The British police do not carry guns. You could hear the noise of guns firing in the distance.Handguns and riflesAiming and aimHand weapons in sport, a device that makes a very loud sudden noise as a signal to start a race: At the gun, the runners sprinted away down the track.Athletics a device that you hold in your hand and use for sending out a liquid or object: a spray gun
See also
ToolsGardening tools
hired gun mainly US informal a person who is paid to shoot and kill someoneMurderers and attackers

gun

verb [T] uk   /ɡʌn/ (-nn-) mainly US old-fashioned informal us  
to make an engine operate at a higher speed: You must have been really gunning the engine to get here on time.Driving and operating road vehiclesIncreasing and decreasing speed of motionMoving quickly
Phrasal verbs
(Definition of gun from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of gun?
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