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demoniac

American  
[dih-moh-nee-ak, dee-muh-nahy-ak] / dɪˈmoʊ niˌæk, ˌdi məˈnaɪ æk /

adjective

  1. of, relating to, or like a demon; demonic.

    demoniac laughter.
    Antonyms:
    angelic

  2. possessed by or as by an evil spirit; raging; frantic.

noun

  1. a person seemingly possessed by a demon or evil spirit.

demoniac British  
/ dɪˈməʊnɪˌæk /

adjective

  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
"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

noun

  1. a person possessed by an evil spirit or demon

"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

Other Word Forms

  • demoniacally adverb

Etymology

Origin of demoniac

1350–1400; Middle English < Late Latin daemoniacus < Greek daimoniakós, equivalent to daimóni ( os ) pertaining to a daemon + -akos -ac

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.