madness

noun

mad·​ness ˈmad-nəs How to pronounce madness (audio)
Synonyms of madnessnext
1
: the quality or state of being mad: such as
a
: a state of severe mental illness
not used technically
… fortifications against an inner darkness, the threat of madness that crouched above him throughout his life.Robert F. Moss
b
: behavior or thinking that is very foolish or dangerous : extreme folly
an idea that is pure/sheer madness
d
: intense anger : rage
2
: any of several ailments of animals marked by frenzied behavior
specifically : rabies

Examples of madness in a Sentence

He suffered a series of tragedies that nearly drove him to madness. Her friends told her the idea was pure madness, but she went through with it anyway. It was the height of madness for him to drive at such high speeds!
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Let the madness begin Here are 4 things to know at the start of the March Madness and the journey to the Final Four. Alexandra Banner, CNN Money, 19 Mar. 2026 Stern writes with a manic whirl of comic images and sentences and ideas that are disturbing and hilarious and sometimes grim, all of the madness carefully, delicately constructed. Cathleen Schine, The New York Review of Books, 19 Mar. 2026 The three titular Debras (Sandy Honig, Mitra Jouhari, and Alyssa Stonoha) live in the fake town of Lemoncurd, where their antics are absorbed into a larger background of silly madness. Eric Vilas-Boas, Vulture, 18 Mar. 2026 Both its French and English versions use simple clear language to make devastating points about how quickly society can disintegrate into bellowing madness. Christopher Arnott, Hartford Courant, 18 Mar. 2026 See All Example Sentences for madness

Word History

First Known Use

14th century, in the meaning defined at sense 1

Time Traveler
The first known use of madness was in the 14th century

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Cite this Entry

“Madness.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/madness. Accessed 22 Mar. 2026.

Medical Definition

madness

noun
mad·​ness ˈmad-nəs How to pronounce madness (audio)
1
: a severely disordered state of mind
not used technically
2
: any of several ailments of animals marked by frenzied behavior
specifically : rabies

More from Merriam-Webster on madness

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