Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

madness

play
noun mad·ness \ˈmad-nəs\

Simple Definition of madness

  • : a state of severe mental illness

  • : behavior or thinking that is very foolish or dangerous

Source: Merriam-Webster's Learner's Dictionary

Full Definition of madness

  1. 1 :  the quality or state of being mad: as a :  rage b :  insanity c :  extreme folly d :  ecstasy, enthusiasm

  2. 2 :  any of several ailments of animals marked by frenzied behavior; specifically :  rabies

Examples of madness in a sentence

  1. He suffered a series of tragedies that nearly drove him to madness.

  2. Her friends told her the idea was pure madness, but she went through with it anyway.

  3. It was the height of madness for him to drive at such high speeds!



14th Century

First Known Use of madness

14th century


Medical Dictionary

madness

play
noun mad·ness \ˈmad-nəs\

Medical Definition of madness

  1. 1:  a severely disordered state of mind—not used technically

  2. 2:  any of several ailments of animals marked by frenzied behavior; specifically :  rabies





Seen and Heard

What made you want to look up madness? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

of or relating to the heavens

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

dog-eating-apple

Which is a synonym of asperse?

placate beat defame divulge
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ