: one whose ideas or actions are eccentric, fantastic, or insane : screwball

Example Sentences

a bunch of kooks dressed up in weird costumes if you insist on painting your house bright orange, everyone will assume you are a kook
Recent Examples on the Web Harold Camping, the guy making these claims is, to be charitable, a kook. Phil Plait, Discover Magazine, 20 May 2011 Almedilla’s accident-prone Sarah Jane Moore, who shoots her pooch on her way to infamy, is a standout kook. Los Angeles Times, 23 Feb. 2022 But being a professional kook was a lonely crusade. Zachary D. Carter, The New Republic, 17 June 2021 Again and again, Pelosi is dismissed, first as a dilettante housewife, then as a far-left San Francisco kook, finally as an establishment dinosaur — and throughout, as a woman. Michelle Goldberg, New York Times, 5 May 2020 The line of attack is the familiar one of using a few isolated idiots or kooks to tar the entire enterprise. Rich Lowry, National Review, 22 Apr. 2020 This shortcoming might explain why the show takes such pains to portray her as a kook, and possibly even a murderer. Sophie Gilbert, The Atlantic, 7 Apr. 2020 The 2020 Democrats are a party of kooks and retreads and charlatans, now reduced to hoping for a pandemic of the coronavirus to give them any room to attack the incumbent. Conrad Black, National Review, 11 Mar. 2020 Social media is flooding with kooks claiming the media and the Democrats are responsible for new coronavirus. Paul Daugherty, Cincinnati.com, 16 Mar. 2020 See More

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

Word History


by shortening & alteration from cuckoo

First Known Use

1960, in the meaning defined above

Time Traveler
The first known use of kook was in 1960

Dictionary Entries Near kook

Cite this Entry

“Kook.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/kook. Accessed 1 Feb. 2023.

Kids Definition


: a person who acts in a strange or insane way : nut

More from Merriam-Webster on kook

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