Source : Webster's Revised Unabridged Dictionary (1913)

Madness \Mad"ness\, n. [From {Mad}, a.]
   1. The condition of being mad; insanity; lunacy.

   2. Frenzy; ungovernable rage; extreme folly.

   Syn: Insanity; distraction; derangement; craziness; lunacy;
        mania; frenzy; franticness; rage; aberration;
        alienation; monomania. See {Insanity}.

Source : WordNet®

madness
     n 1: obsolete terms for legal insanity [syn: {lunacy}, {insaneness}]
     2: an acute viral disease of the nervous system of warm-blooded
        animals (usually transmitted by the bite of a rabid
        animal); rabies is fatal if the virus reaches the brain
        [syn: {rabies}, {hydrophobia}, {lyssa}]
     3: a feeling of intense anger; "hell hath no fury like a woman
        scorned"; "his face turned red with rage" [syn: {fury}, {rage}]