AI overview
Spirit refers to an immaterial being—something that exists without physical form or substance. It matters because many religious, philosophical, and cultural traditions regard spirit as a fundamental aspect of existence that shapes beliefs about consciousness, the soul, and what transcends the physical world.
AI-generated from the Wikipedia summary — may contain errors.
Article
In folklore and ethnography, a spirit is an "immaterial being", "supernatural agent", the "soul of a person", an "invisible entity", or the "soul of a seriously suffering person". Often spirits have an intermediate status between gods and humans, sharing some properties with gods (Incorporeality, greater powers) and some with humans (finite, not omniscience).
Thus, a spirit would have a form of existing and thinking; it would exist without being generally visible; often popular traditions endow it with miraculous powers and more or less occult influences on the physical world.