plural lunacies
1
dated
a
b
: intermittent insanity once believed to be related to phases of the moon
2
: wild foolishness : extravagant folly
3
: a foolish act
Examples of lunacy in a Sentence
Quitting her job was lunacy.
His idea was considered total lunacy.
Recent Examples on the Web
Among the other eight walk-offs, the only one that can match the pure lunacy of Bailey’s was Heliot Ramos’ Little League home run, one that required the Texas Rangers to commit two throwing errors.
—
Justice Delos Santos, Mercury News, 9 July 2025
Four games in, and everything’s all tied up at 2-2 after Thursday night’s lunacy, which featured Edmonton rallying to undo a 3-0 first-period deficit and Florida’s Sam Reinhart potting the tying goal with just 19.5 ticks left on the clock.
—Anthony Crupi, Sportico.com, 13 June 2025
Why do so many leaders turn a blind eye to this lunacy?
—Letters To The Editor, Oc Register, 29 May 2025
Hart would throw one more strike in four more pitches, and his day was finished, as the lunacy was just getting started.
—Kevin Acee, San Diego Union-Tribune, 6 Apr. 2025
See All Example Sentences for lunacy
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Justice Delos Santos, Mercury News, 9 July 2025
Four games in, and everything’s all tied up at 2-2 after Thursday night’s lunacy, which featured Edmonton rallying to undo a 3-0 first-period deficit and Florida’s Sam Reinhart potting the tying goal with just 19.5 ticks left on the clock.
—Anthony Crupi, Sportico.com, 13 June 2025
Why do so many leaders turn a blind eye to this lunacy?
—Letters To The Editor, Oc Register, 29 May 2025
Hart would throw one more strike in four more pitches, and his day was finished, as the lunacy was just getting started.
—Kevin Acee, San Diego Union-Tribune, 6 Apr. 2025
See All Example Sentences for lunacy
Cite this Entry
“Lunacy.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/lunacy. Accessed 22 Jul. 2025.
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Medical Definition
lunacy
noun
lu·na·cy
ˈlü-nə-sē 
plural lunacies
dated
: mental illness
also
: intermittent mental illness once believed to be related to phases of the moon
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