The word spirit has many differing meanings and connotations, all of them relating to a non-corporeal substance contrasted with the material body. The spirit of a human being is considered the animating, sensitive or vital principle in that individual, similar to the soul taken to be the seat of the mental, intellectual and emotional powers. It can also describe the disposition or nature of a person, or his or her temper, energy, couragesness or mood. It can also mean soul.

The term may also refer to any being imagined as incorporeal or immaterial, such as ghosts.