/ Dictionary / Index D demonic: Meaning and Definition of Find definitions for: de•mon•ic Pronunciation: (di-mon'ik), [key] — adj. inspired as if by a demon, indwelling spirit, or genius. demoniac (def. 1). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: demonic (Thesaurus) demonian demonism Related Content Daily Word Quiz: ounterfeit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language