/ Dictionary / Index D derange: Meaning and Definition of Find definitions for: de•range Pronunciation: (di-rānj'), [key] — -ranged, -rang•ing. to throw into disorder; disarrange. to disturb the condition, action, or function of. to make insane. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: derange (Thesaurus) Derain deranged Related Content Daily Word Quiz: agitated Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language