lunacy

noun
lu·​na·​cy | \ ˈlü-nə-sē How to pronounce lunacy (audio) \
plural lunacies

Definition of lunacy

1 dated
b : intermittent insanity once believed to be related to phases of the moon
2 : wild foolishness : extravagant folly
3 : a foolish act

Keep scrolling for more

Examples of lunacy in a Sentence

Quitting her job was lunacy. His idea was considered total lunacy.
Recent Examples on the Web Trump on Iowa caucus:Iowa has a 'front row seat to the lunacy' of left Burbank said that, like him, at least two of his fellow caucusgoers are students. Kim Hjelmgaard, USA TODAY, "Iowa's caucusgoers have a new place to vote: overseas," 1 Feb. 2020 This may partly have been because of the weight of Cuban-Americans: Mr Sanders—in an act either of admirable principle or political lunacy—has repeatedly praised the accomplishments of the Castro regime. The Economist, "Electoral distancing Joe Biden builds an insurmountable lead," 19 Mar. 2020 Knicks +475 should be closer to +10000, and betting Lakers -667 — or any team this heavily favored in the regular season — is lunacy. Geoff Clark, USA TODAY Sportsbook Wire, "Los Angeles Lakers at New York Knicks odds, picks and best bets," 22 Jan. 2020 Beyond the utter lunacy of the current college admission scandal is a much more widespread angst among parents and, increasingly, struggles among their kids. Ned Johnson, chicagotribune.com, "College admissions scandal: Even if you could give your kid everything, should you?," 20 Sep. 2019 For all of his ideological lunacy, Michael Foot was an intelligent and thoughtful man with an admirable record of standing up to fascism. Nr Editors, National Review, "The Week," 19 Dec. 2019 Commenters went berserk for and against my recipe, with many lording the reverse sear as the preferred method over my apparent sheer lunacy. Becky Krystal, Washington Post, "Don’t want to mess up that big piece of meat you just bought? Enter the reverse sear.," 9 Sep. 2019 Someone had to begin to say no to the lunacy that has prevailed. Peter Georgescu For Cnn Business Perspectives, CNN, "While the government does nothing about gun violence, CEOs are filling the void," 10 Sep. 2019 Beyond the utter lunacy of the current college admission scandal is a much more widespread angst among parents and, increasingly, struggles among their kids. Ned Johnson, Washington Post, "College admissions scandal: Even if you could give your kid everything, should you?," 17 Sep. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'lunacy.' 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 lunacy

1541, in the meaning defined at sense 1a

History and Etymology for lunacy

lunatic

Keep scrolling for more

Learn More about lunacy

Time Traveler for lunacy

Time Traveler

The first known use of lunacy was in 1541

See more words from the same year

Statistics for lunacy

Last Updated

14 Apr 2020

Cite this Entry

“Lunacy.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/lunacy. Accessed 28 May. 2020.

Keep scrolling for more

More Definitions for lunacy

lunacy

noun
lu·​na·​cy | \ ˈlü-nə-sē How to pronounce lunacy (audio) \
plural lunacies

Medical Definition of lunacy

dated
: mental illness also : intermittent mental illness once believed to be related to phases of the moon

lunacy

noun
lu·​na·​cy | \ ˈlü-nə-sē How to pronounce lunacy (audio) \

Legal Definition of lunacy

Keep scrolling for more

More from Merriam-Webster on lunacy

Thesaurus: All synonyms and antonyms for lunacy

Spanish Central: Translation of lunacy

Nglish: Translation of lunacy for Spanish Speakers

Britannica English: Translation of lunacy for Arabic Speakers

Comments on lunacy

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

WORD OF THE DAY

See Definitions and Examples »

Get Word of the Day daily email!

Test Your Vocabulary

Obscure Shapes

  • a pile of three dimensional shapes in green
  • Something that is ooid is shaped like:
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Syn City

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

TAKE THE QUIZ
Love words? Need even more definitions?

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