The Definition of "Undead"

First and foremost, the term "undead" is a collective name for fictional, mythological, or legendary beings that are deceased yet behave as if they are alive. Undead may be either corporeal (physically able to touch see, and communicate with them) or non-corporeal (spiritual and ghostly; unable to touch them, difficult to see them. The phenomenon of spirits contacting us from "beyond the grave" has existed since the beginning of time. One of the first of the cave men, whose name was simply as "Glog" in records, attempted to tell his tribe that he saw the wind whip around in a small pocket inside his cave. The day before, a tribe member and Glog's friend had been killed by a wild animal. Glog protested daily that the "wind" was getting colder and more unbearable, and still they ignored him. Then, one night, Glog was visited by the "wind" which took on the form of a man. Frightened, Glog fled from his tribe and mate in the cave and never returned.