mad·​man | \ ˈmad-ˌman How to pronounce madman (audio) , -mən\

Definition of madman

: a man who is or acts as if insane

Keep scrolling for more

Synonyms for madman


daredevil, devil, madcap

Visit the Thesaurus for More 

Examples of madman in a Sentence

a celebrity being stalked by a madman as far as I'm concerned, anyone who likes skydiving is a madman

Recent Examples on the Web

The madman runs through 15 absolute beaters in a quick 15 minutes. Kat Bein, Billboard, "Dillon Francis Drops Maddening 'Moombahton' Mixtape: Listen," 27 June 2018 Snow mazes are fun—as long as you’re not being chased through one by a madman with an axe to grind. Julie Kosin, Harper's BAZAAR, "The 28 Best Halloween Movies on Netflix," 11 Oct. 2018 Svi Mykhailiuk is shooting like a madman (51.0% from three in Big 12 play). Dan Greene,, "Here's One Team You Shouldn't Overlook, Especially in March," 22 Jan. 2018 Congress, gone, SCOTUS, gone, the Executive branch, in the hands of a madman, the FBI, DOE, EPA, etc. etc. etc. Rita Thompson, Billboard, "Supreme Court Justice Anthony Kennedy's Retirement Sparks Reactions From Cher, Hayley Kiyoko & More," 27 June 2018 After all, the Olympics will be held in PyeongChang, South Korea, which—this may not surprise you—is just south of North Korea, which is ruled by supreme leader and nuclear missile-wielding madman Kim Jong-un. Michael Rosenberg,, "What, me worry? Preparing to spend two weeks at the 2018 Olympics in PyeongChang," 8 Feb. 2018 Jaws is employed by madman Karl Stromberg (Curd Jurgens), who tries to provoke a nuclear holocaust and then create a civilization under the sea. Charles Stockdale And John Harrington, USA TODAY, "Every James Bond film ranked from worst to best," 18 June 2018 In Onion’s telling, John Brown is a wild-eyed zealot, a cartoonish madman who talks like Yosemite Sam and prays for hours on end but whose madness and prayers are nevertheless devoted to the abolition of slavery. WSJ, "Randall Fuller," 1 June 2018 In this sixth installment, Ethan Hunt (Tom Cruise) goes to Paris to prevent a madman (Sean Harris) from blowing up parts of the world. Gary Thompson,, "Summer movies 2018: Here's when 'Ocean's 8,' 'Incredibles 2,' 'Jurassic World' and more hit theaters," 6 June 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'madman.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of madman

14th century, in the meaning defined above

Keep scrolling for more

Learn More about madman

Dictionary Entries near madman

mad keen on




mad money



Statistics for madman

Look-up Popularity

Time Traveler for madman

The first known use of madman was in the 14th century

See more words from the same century

Keep scrolling for more

More Definitions for madman



English Language Learners Definition of madman

: a man who has severe mental illness : an insane man
informal : a man who acts in a wild and uncontrolled way


mad·​man | \ ˈmad-ˌman How to pronounce madman (audio) , -mən\
plural madmen\ -​mən \

Kids Definition of madman

: a man who is or acts as if insane


mad·​man | \ ˈmad-ˌman, -mən How to pronounce madman (audio) \

Medical Definition of madman

: a man who is or acts as if insane

Keep scrolling for more

More from Merriam-Webster on madman

Rhyming Dictionary: Words that rhyme with madman

Thesaurus: All synonyms and antonyms for madman

Spanish Central: Translation of madman

Nglish: Translation of madman for Spanish Speakers

Comments on madman

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


highly pertinent or appropriate

Get Word of the Day daily email!

Test Your Vocabulary

Challenging Vocabulary Quiz Returns!

  • stylized drawing of woman pole vaulting across gap to get trophy
  • Which is a synonym of fuliginous?
True or False

Test your knowledge - and maybe learn something along the way.


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

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!