Yup. Notice that NOT ONE of those definitions is "to kill".
The history of the gun explains precisely what a gun is designed for.
Ignore history at your peril, all you get I appellation of being ignorant.
However lets look as some dictionary definitions shall we:-
1 - A weapon consisting of a metal tube from which a projectile is fired at high velocity into a relatively flat trajectory.
1- a weapon incorporating a metal tube from which bullets, shells, or other missiles are propelled by explosive force, typically making a characteristic loud, sharp noise.
a : a piece of ordnance usually with high muzzle velocity and comparatively flat trajectory
1. a weapon consisting of a metal tube, with mechanical attachments, from which projectiles are shot by the force of an explosive; a piece of ordnance.
1 a weapon that shoots bullets, for example a pistol or a rifle. You load a gun with ammunition and pull the trigger to use it
1 a. a weapon with a metallic tube or barrel from which a missile is discharged, usually by force of an explosion. It may be portable or mounted. In a military context the term applies specifically to a flat-trajectory artillery piece
You've been wrong all along.
Thank you :)