from The American Heritage® Dictionary of the English Language, 4th Edition
- n. An evil supernatural being; a devil.
- n. A persistently tormenting person, force, or passion: the demon of drug addiction.
- n. One who is extremely zealous, skillful, or diligent: worked away like a demon; a real demon at math.
- n. Variant of daimon.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An evil spirit.
- n. A fallen angel or Satanic divinity; a false god.
- n. One’s inner spirit or genius, a daimon.
- n. A spirit or lesser divinity between men and gods.
- n. A foible; a flaw in a person’s character.
- n. Someone of remarkable or diabolical energy or ability.
from the GNU version of the Collaborative International Dictionary of English
- n. A spirit, or immaterial being, holding a middle place between men and deities in pagan mythology.
- n. One's genius; a tutelary spirit or internal voice.
- n. An evil spirit; a devil.
from The Century Dictionary and Cyclopedia
- n. In Greek myth, a supernatural agent or intelligence, lower in rank than a god; a spirit holding a middle place between gods and men; one of a class of ministering spirits, sometimes regarded as including the souls of deceased persons; a genius: as, the demon or good genius of Socrates. Sometimes written daimon.
- n. An evil spirit; a devil: from the belief of the early Christian world that all the divinities of the pagans were devils.
- n. Figuratively, an atrociously wicked or cruel person; one characterized by demoniac passions or conduct.
- n. [capitalized] A certain genus of Coleoptera.
- n. In anthropology, a supernatural protector or helper. See manito and *nyarong.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a cruel wicked and inhuman person
- n. someone extremely diligent or skillful
- n. an evil supernatural being
Middle English, from Late Latin daemōn, from Latin, spirit, from Greek daimōn, divine power.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Ancient Greek δαίμων (daimōn, "god, goddess, divine power") (Wiktionary)