gun
n. countable A2 Elementary Oxford US //ˈɡən// UK //ɡˈʌn// gun
n. a weapon that shoots bullets or other small objects through a metal tube. You use it for hunting, sport, or protection.
n. a weapon consisting of a metal tube from which projectiles are fired by explosive force or compressed air.
The police officer carries a gun for safety.
The hunter cleaned his gun carefully before heading out into the woods for the start of the season.
Historians often debate how the widespread availability of the gun transformed social structures by shifting the balance of power away from traditional armored cavalry.
Usage
In nautical contexts, refers specifically to heavy cannons rather than small arms.