• synonyms


[dih-moh-nee-ak, dee-muh-nahy-ak]
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adjective Also de·mo·ni·a·cal [dee-muh-nahy-uh-kuhl] /ˌdi məˈnaɪ ə kəl/.
  1. of, relating to, or like a demon; demonic: demoniac laughter.
  2. possessed by or as by an evil spirit; raging; frantic.
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  1. a person seemingly possessed by a demon or evil spirit.
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Origin of demoniac

1350–1400; Middle English < Late Latin daemoniacus < Greek daimoniakós, equivalent to daimóni(os) pertaining to a daemon + -akos -ac
Related formsde·mo·ni·a·cal·ly [dee-muh-nahy-ik-lee] /ˌdi məˈnaɪ ɪk li/, adverb

Antonyms for demoniac

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for demoniacal

maniacal, devilish, satanic, manic, crazed, infernal, bad, diabolic, diabolical, fiendish, fired, frantic, frenetic, frenzied, hellish, impious, insane, inspired, mad, possessed

Examples from the Web for demoniacal

Historical Examples of demoniacal

  • Demoniacal possession was a mania in France in the seventeenth century.

    The Superstitions of Witchcraft

    Howard Williams

  • In the distance a coyote was making the night hideous with his demoniacal howlings.

    The Cave of Gold

    Everett McNeil

  • They also believe in the existence of a demoniacal hierarchy.

  • It is now believed that the patient is free from all demoniacal attacks.

  • Would you also create for yourself and the world a demoniacal enemy?


    Mary W. Shelley

British Dictionary definitions for demoniacal


adjective also: demoniacal (ˌdiːməˈnaɪəkəl)
  1. of, like, or suggestive of a demon; demonic
  2. suggesting inner possession or inspirationthe demoniac fire of genius
  3. frantic; frenzied; feverishdemoniac activity
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  1. a person possessed by an evil spirit or demon
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Derived Formsdemoniacally, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for demoniacal



c.1400, "possessed, insane," earlier (late 14c.) as a noun, "one who is possessed," from Late Latin daemoniacus (c.200), from Greek daimoniakos "possessed by a demon," from diamon (see demon).

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Online Etymology Dictionary, © 2010 Douglas Harper