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

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Examples of lunacy in a Sentence

Quitting her job was lunacy. His idea was considered total lunacy.

Recent Examples on the Web

Merkley, a Democrat from Oregon, likes to recount the story to show the lunacy of the federal government’s treatment of the cannabis industry. Elizabeth Rembert, BostonGlobe.com, "Bags stuffed with cash add to pressure for cannabis banking law," 8 Aug. 2019 In that context, giving up a Cy Young-caliber starter is the height of lunacy. Jon Tayler, SI.com, "Indians Come Out Surprisingly Well in Trevor Bauer Trade," 31 July 2019 The best time to catch all the lunacy is after local sunset on March 20 and 21, just as the moon rises. Andrew Fazekas, National Geographic, "See the first supermoon on the spring equinox in 19 years," 19 Mar. 2019 Of the 177 initial respondents, 62 percent said a morning kick was lunacy, compared to 38 percent in favor. Sean Keeler, The Denver Post, "Keeler: Larry Scott should spare CU Buffs from Pac-12’s Breakfast Club," 27 July 2019 In action, this summer 2019 game looks like the silly manipulate-anything concept of Job Simulator, only with an increased emphasis on smashy-smash lunacy that combines traditional weapons, supercharged implements of destruction, and everyday items. Sam Machkovech, Ars Technica, "E3’s first VR-exclusive gaming press conference was actually pretty rad," 10 June 2019 Yaron Brook of the Ayn Rand Institute says this is lunacy. John Stossel, Orange County Register, "A defense of the morality of capitalism," 19 June 2019 But, to be clear, many experts consider bold projections of celestial living to be, pardon the pun, lunacy. National Geographic, "Countdown to a new era inSpace," 17 June 2019 That listeners’ health can be a legitimate concern is only one of a dozen ways to measure the sheer lunacy this rivalry stirs up. Joshua Robinson, WSJ, "The Last Outpost of Pure Soccer Mayhem," 23 Nov. 2018

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.

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First Known Use of lunacy

1541, in the meaning defined at sense 1a

History and Etymology for lunacy

lunatic

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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

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