A deadly weapon is any object or instrument designed to inflict serious injury, harm or death upon a person or animal. This can include firearms such as guns and rifles, knives, blunt objects like clubs or bats, explosive devices, and even vehicles used in violent crimes. The term "deadly weapon" is often used interchangeably with the phrase "weapon of mass destruction," which refers to any device that can cause widespread damage, injury or death to a large number of people. In legal contexts, possession or use of deadly weapons may be prohibited or regulated by law.