Gun (noun)

1. A weapon consisting of a metal tube, with mechanical attachments, from which projectiles are shot by the force of an explosive.
2. A device for spraying paint, insecticide, or other liquified material.

Origin:

Early 14c., gonne, apparently a variant of middle english gonny, plural of gonne, an early form of "gun" (see gamut), perhaps influenced by old norse gunnr, cognate of old english gunn 'war, battle'; from a scandinavian source, such as old norse gunnr 'war' or norwegian gunnhildr 'war-battle' (a female name). the change in form in english was influenced by the change in form of "won" (see won (adj.)).

Examples:

1. The hunter carried a rifle and a shotgun, but he preferred to use his trusty old gun.
2. She heard a loud bang and realized someone had fired a gun.
3. The detective examined the crime scene for any clues related to the gun used in the robbery.
4. The artist used a spray gun to create the mural on the wall.
5. The farmer used a pesticide gun to spray his crops with insecticide.