demoniac

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

adjective Also de·mo·ni·a·cal [dee-muh-nahy-uh-kuhl] /ˌdi məˈnaɪ ə kəl/.

of, relating to, or like a demon; demonic: demoniac laughter.
possessed by or as by an evil spirit; raging; frantic.

noun

a person seemingly possessed by a demon or evil spirit.

Origin of demoniac

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

Related forms

de·mo·ni·a·cal·ly [dee-muh-nahy-ik-lee] /ˌdi məˈnaɪ ɪk li/, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for demoniac

British Dictionary definitions for demoniac

demoniac

/ (dɪˈməʊnɪˌæk) /

adjective also: demoniacal (ˌdiːməˈnaɪəkəl)

of, like, or suggestive of a demon; demonic
suggesting inner possession or inspirationthe demoniac fire of genius
frantic; frenzied; feverishdemoniac activity

noun

a person possessed by an evil spirit or demon

Derived Forms

demoniacally, 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