What is sheath meaning?

A sheath is a protective covering or casing that wraps around a sharp or dangerous object to prevent accidental injury or damage. It can be made from a variety of materials such as leather, plastic, or metal and is often used to store knives, swords, or other tools. Sheath can also refer to a protective covering that surrounds certain parts of the body, such as the nerve sheath that covers and protects nerves in the body or the sheath of an animal's tail which protects it from harm.