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 (dĭ-mō′nē-ăk′) also de·mo·ni·a·cal (dē′mə-nī′ə-kəl)
1. Possessed, produced, or influenced by a demon: demoniac creatures.
2. Of, resembling, or suggestive of a devil; fiendish: demoniac energy; a demoniacal fit.
One who is or seems to be 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.]

de′mo·ni′a·cal·ly adv.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


1. of, like, or suggestive of a demon; demonic
2. suggesting inner possession or inspiration: the demoniac fire of genius.
3. frantic; frenzied; feverish: demoniac activity.
(Theology) a person possessed by an evil spirit or demon
ˌdemoˈniacally adv
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(dɪˈmoʊ niˌæk, ˌdi məˈnaɪ æk)

adj. Also, de•mo•ni•a•cal (ˌdi məˈnaɪ ə kəl)
1. of, pertaining to, or like a demon; demonic.
2. possessed by or as if by an evil spirit; raging; frantic.
[1350–1400; Middle English < Late Latin daemoniacus < Greek daimoniakós]
de`mo•ni′a•cal•ly, adv.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.demoniac - someone who acts as if possessed by a demon
fiend, ogre, demon, monster, devil - a cruel wicked and inhuman person
Adj.1.demoniac - frenzied as if possessed by a demondemoniac - frenzied as if possessed by a demon; "the soldier was completely amuck"; "berserk with grief"; "a berserk worker smashing windows"
insane - afflicted with or characteristic of mental derangement; "was declared insane"; "insane laughter"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.


A. ADJ = demoniacal
B. Ndemoníaco/a m/f, demoniaco/a m/f
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005


nBesessene(r) mf
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007


[dɪˈməʊnɪæk] demoniacal [ˌdiːməʊˈnaɪəkl] adjdemoniaco/a, diabolico/a
Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995