from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Possessed, produced, or influenced by a demon: demoniac creatures.
- adj. Of, resembling, or suggestive of a devil; fiendish: demoniac energy; a demoniacal fit.
- n. One who is or seems to be possessed by a demon.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. possessed or controlled by a demon.
- adj. Of or pertaining to demons; demonic.
- n. One who is possessed or controlled by a demon.
from the GNU version of the Collaborative International Dictionary of English
- adj. Pertaining to, or characteristic of, a demon or evil spirit; devilish
- adj. Influenced or produced by a demon or evil spirit.
- adj. resembling or suggesting possession by a demon.
- adj. in a murderous frenzy as if possessed by a demon.
- n. A human being possessed by a demon or evil spirit; one whose faculties are directly controlled by a demon.
- n. One of a sect of Anabaptists who maintain that the demons or devils will finally be saved.
from The Century Dictionary and Cyclopedia
- Pertaining to a demon or spirit.
- Produced by demons; influenced by demons.
- Of the character of a demon; acting as if possessed by demons; wild; frantic; extremely wicked or cruel.
- n. One who is supposed to be possessed by a demon; one whose volition and other mental faculties seem to be overpowered. restrained, or disturbed in their regular operation by an evil spirit; specifically, a lunatic.
- n. [capitalized] One of a section of the Anabaptists who maintained that, the devils would ultimately be saved.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. frenzied as if possessed by a demon
- n. someone who acts as if possessed by a demon
Middle English demoniak, from Late Latin daemoniacus, from Greek *daimoniakos, from daimonios, of a spirit, from daimōn, divine power; see demon.(American Heritage® Dictionary of the English Language, Fourth Edition)
Latin daemoniacus. (Wiktionary)