/ Dictionary / Index D delirium: Meaning and Definition of Find definitions for: de•lir•i•um Pronunciation: (di-lēr'ē-um), [key] — pl. -lir•i•ums, -lir•i•a a more or less temporary disorder of the mental faculties, as in fevers, disturbances of consciousness, or intoxication, characterized by restlessness, excitement, delusions, hallucinations, etc. a state of violent excitement or emotion. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: delirium (Thesaurus) delirious delirium tremens Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language