/ Dictionary / Index M madness: Meaning and Definition of Find definitions for: mad•ness Pronunciation: (mad'nis), [key] — n. the state of being mad; insanity. senseless folly: It is sheer madness to speak as you do. frenzy; rage. intense excitement or enthusiasm. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: madness (Thesaurus) mad money Madoera Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language