demons

n. evil spirit; devil, fiend; mischievous person, troublemaker (especially a child)

In religion, folklore, and mythology a demon (or daemon, dæmon, daimon from Greek: δαίμων [ðaïmon]) is a supernatural being that has generally been described as a malevolent spirit, and in Christian terms it is generally understood as a  Fallen angel, formerly of God. A demon is frequently depicted as a force that may be conjured and insecurely controlled. The "good" demon in recent use is largely a literary device (e.g., Maxwell's demon), though references to good demons can be found in Hesiod and Shakespeare. In common language, to "demonize" a person means to characterize or portray them as evil, or as the source of evil.
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Noun
1. one of the evil spirits of traditional Jewish and Christian belief
(synonym) devil, fiend, daemon, daimon
(hypernym) evil spirit
(hyponym) incubus
(derivation) demonize, demonise
2. a cruel wicked and inhuman person
(synonym) monster, fiend, devil, ogre
(hypernym) unpleasant person, disagreeable person
(hyponym) demoniac
(derivation) demonize, demonise
3. someone extremely diligent or skillful; "he worked like a demon to finish the job on time"; "she's a demon at math"
(hypernym) actor, doer, worker

n. demon, daemon, fiend, devil

[Judaic] Demons are spirits that act malevolently against human beings. The Bible makes repeated mention of evil spirits (Lev. 16: 10; I Sam. 16:14-16; Isa. 34:14), including satyrs and night demons, but does not provide a great deal of detail. More elaborate stories about demons appear during the Greco-Roman period. The existence of demons, while widely accepted, has always presented a theological difficulty. Since all things are ultimately the creation of the one God, the question of why should evil spirits exist has greatly exercised Jewish thought. Apocalyptic literature offers the first attempt to explain their existence in a monotheistic context by claiming demons are really fallen angels. Rabbinic literature provides the first extensive source for Jewish demonology, though the information is scattered though many sources. In it, several explanations for the existence of demons are offered. They are a creation of the twilight of the sixth day (Pirkei Avot 5.6). Abraham ibn Ezra describ...
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