gun

noun [C]

/ɡʌn/

Definition

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 staple gunToolsGardening tools hired gun mainly US informal › a person who is paid to shoot and kill someoneMurderers and attackers

(Definition of gun noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)