Weapon possession, as a crime, consists of that circumstance in which a person who is not legally authorised to carry a concealed weapon is found in possession of such a weapon.

Alternately, it can also consist of a circumstance where the holder of that privilege is found with a weapon in a place where that privilege does not apply, such as a school, church, or another jurisdiction not honoring the permit.

Additionally it can mean possession of a firearm illegal for civilians, such as a machine gun or sawed-off shotgun, or of illegal knives such as stilettos or switchblades.