A zombie is a fictional undead corporeal revenant created through the reanimation of a corpse. Zombies are most commonly found in horror and fantasy genre works. The term comes from Haitian folklore, in which a zombie is a dead body reanimated through various methods, most commonly magic. Modern depictions of the reanimation of the dead do not necessarily involve magic but often invoke science fictional methods such as carriers, radiation, mental diseases, vectors, pathogens, parasites, scientific accidents, etc.
Zombies are featured widely in Haitian rural folklore as dead persons physically revived by the act of necromancy of a bokor, a sorcerer or witch. The bokor is opposed by the houngan (priest) and the mambo (priestess) of the formal voodoo religion. A zombie remains under the control of the bokor as a personal slave, having no will of its own.
The Haitian tradition also includes an incorporeal type of zombie, the "zombie astral", which is a part of the human soul. A bokor can capture a zombie astral to enhance his spiritual power. A zombie astral can also be sealed inside a specially decorated bottle by a bokor and sold to a client to bring luck, healing, or business success. It is believed that God eventually will reclaim the zombie's soul, so the zombie is a temporary spiritual entity.
The two types of zombie reflect soul dualism, a belief of Haitian voodoo. Each type of legendary zombie is therefore missing one half of its soul (the flesh or the spirit).