Undead

Undead are beings in mythology, legend, or fiction that are deceased but behave as if they were alive. A common example of an undead being is a corpse reanimated by supernatural forces, by the application of either the deceased's own life force or that of another being (such as a demon).

The undead may be incorporeal (ghosts) or corporeal (mummies, vampires and zombies). The undead are featured in the belief systems of most cultures.