Weapon

A weapon, arm, or armament is a tool or instrument used in order to inflict damage or harm to enemies or other living beings, structures, or systems. Weapons are used to increase the efficacy and efficiency of activities such as hunting, crime, law enforcement, and warfare. In a broader context, weapons may be construed to include anything used to gain a strategic, material or mental advantage over an adversary.

While ordinary objects such as sticks, stones or cars can be used as weapons, many are expressly designed for the purpose - ranging from simple implements such as clubs to swords and guns and on to complicated modern intercontinental ballistic missiles, biological and cyberweapons.