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1. (Alternative Belief Systems) a person thought to be possessed by an evil spirit
2. a fanatic or zealot
[C18: via Late Latin from Greek energoumenos having been worked on, from energein to be in action, from energos effective; see energy]
a demoniac; a person possessed by an evil spirit. See also fadsSee also: Demons
a wild enthusiast; a faddist. See also demons.See also: Fads