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Synonyms

madman

American  
[mad-man, -muhn] / ˈmædˌmæn, -mən /

noun

madmen plural
  1. a person who is or behaves as if insane; lunatic; maniac.


madman British  
/ ˈmædmən /

noun

  1. a man who is insane, esp one who behaves violently; lunatic

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of madman

First recorded in 1300–50, madman is from Middle English madd man. See mad, man

Explanation

Madman is an old fashioned, derogatory term for a severely mentally ill person. These days, calling someone with a serious psychiatric illness a madman would be offensive. You're most likely to hear dangerous criminals described as madmen, although it's also common to use this word for someone who acts recklessly: "Look how fast that madman is driving!" Another way to use madman is to emphasize the intensity of something: "She worked on that paper like a madman, writing the entire thing in just a few hours."

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Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Second, if you’re the president and you want to give the Madman Theory a try, you have to play the Madman role consistently.

From Slate • Apr. 21, 2026

Vardy's barrister, Hugh Tomlinson, will be portrayed by Simon Coury, best known for appearing in The Professor And The Madman.

From BBC • Oct. 12, 2022

In the late 1980s, a former Scientologist named Bent Corydon broke away from the Church of Scientology and wrote a scathing book about his experiences entitled "L. Ron Hubbard: Messiah or Madman?"

From Salon • Aug. 30, 2020

To watch all of the entire "Fox Nation Outdoors" series, including Jones' hunting trips with the "Motor City Madman" Ted Nugent, and former U.S.

From Fox News • Jun. 9, 2020

The scale of the theft was a job for a Consummate Professional, not a Secret Admirer or a Lone Madman.

From "The Mona Lisa Vanishes" by Nicholas Day

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