psy·​cho·​path | \ˈsī-kə-ˌpath, ˈsī-kō-\

Definition of psychopath 

: a mentally ill or unstable person especially : a person affected with antisocial personality disorder

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Synonyms for psychopath


bug, crackbrain, crazy, fool, fruitcake, head case, loon, loony, lunatic, maniac, nut, nutcase, nutter [British slang], psycho, sickie, sicko, wacko (also whacko)

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Examples of psychopath in a Sentence

declared that he was a dangerous psychopath who needed to be locked up

Recent Examples on the Web

But a vast syndicate isn't nearly as compelling as a violent psychopath with exquisite taste who also longs for love. Jennifer Ouellette, Ars Technica, "Matt Murdock is back and darker than ever in new trailer for Daredevil season 3," 21 Sep. 2018 There are some psychopaths who are comfortable sharing their thoughts, no matter the size of the audience. Recode Staff, Recode, "Why ‘Star Wars’ is like a social network, and other insights from Eugene Wei on Recode Media," 13 July 2018 Kasady is a sadistic, murderous psychopath, and his bond with Carnage creates a character that’s much more deadly, vicious, deranged, and violent than Venom. Alex Abad-santos, Vox, "Venom’s 2 end-credits scenes, explained," 5 Oct. 2018 Our nation's capitol really is full of psychopaths - and your state might be as well, according to a new working study from Southern Methodist University. Scott Berson, miamiherald, "D.C. is full of psychopaths, new study says. See where your state falls on the list," 19 June 2018 Michael’s violent temper and lack of social skills had gotten him pegged as a psychopath long before last Monday. Chicago Tribune,, "Algren Award finalist: "Lost Causes" by Dana Berube," 2 June 2018 Killing 8-year-old April Tinsley wasn't enough for a psychopath who continues to thwart justice in Fort Wayne. Vic Ryckaert, Indianapolis Star, "Indiana child killer who taunted police featured on Investigation Discovery," 13 July 2018 Her life has for too long been overshadowed by the tragedy orchestrated by a raging psychopath. Ale Russian,, "PEOPLE Explains: The Three Sharon Tate Movies Set for 50th Anniversary of Her Murder," 8 Mar. 2018 To continue reading this story, TRY IT NOW Print subscribers get a password for your existing account here Yes, there will always be jerks, criminals and psychopaths online, as in real life. Dwight Silverman, San Antonio Express-News, "How to be a good internet citizen," 3 July 2018

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

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First Known Use of psychopath

1885, in the meaning defined above

History and Etymology for psychopath

International Scientific Vocabulary

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Last Updated

8 Dec 2018

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Time Traveler for psychopath

The first known use of psychopath was in 1885

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More Definitions for psychopath



English Language Learners Definition of psychopath

: a person who is mentally ill, who does not care about other people, and who is usually dangerous or violent


psy·​cho·​path | \ˈsī-kə-ˌpath \

Medical Definition of psychopath 

: a mentally ill or unstable individual especially : a person having an antisocial personality

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More from Merriam-Webster on psychopath

Rhyming Dictionary: Words that rhyme with psychopath

Thesaurus: All synonyms and antonyms for psychopath

Spanish Central: Translation of psychopath

Nglish: Translation of psychopath for Spanish Speakers

Comments on psychopath

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living or existing for a long time

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