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
Synonyms
Examples of lunacy in a Sentence
Quitting her job was lunacy.
His idea was considered total lunacy.
Recent Examples on the Web
The lunacy of that move and its aftershocks brought Wall Street’s fear gauge, the VIX , to a 52-week high of 65.73 intraday, another insane collaterally thoughtless metric that alternately scared some and made others feel the whole thing is overdone.
—
Jim Cramer, CNBC, 11 Aug. 2024
The situations the protagonists face are specific to Iran, but their escalating lunacy is universal.
—David Rooney, The Hollywood Reporter, 18 June 2024
The American people are fed up with the liberal lunacy that is destroying this country.
—Voice Of The People, New York Daily News, 12 June 2024
Sure, but there’s a gleeful lunacy to Weird Science that’s pretty impressive, especially as the boys’ messing with mother nature get more and more out of control, and some memorable supporting performances by Robert Downey Jr. and Bill Paxton.
—Brian Tallerico, Vulture, 6 June 2024
See all Example Sentences for lunacy 
Jim Cramer, CNBC, 11 Aug. 2024
The situations the protagonists face are specific to Iran, but their escalating lunacy is universal.
—David Rooney, The Hollywood Reporter, 18 June 2024
The American people are fed up with the liberal lunacy that is destroying this country.
—Voice Of The People, New York Daily News, 12 June 2024
Sure, but there’s a gleeful lunacy to Weird Science that’s pretty impressive, especially as the boys’ messing with mother nature get more and more out of control, and some memorable supporting performances by Robert Downey Jr. and Bill Paxton.
—Brian Tallerico, Vulture, 6 June 2024
See all Example Sentences for lunacy
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'lunacy.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Dictionary Entries Near lunacy
Cite this Entry
“Lunacy.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/lunacy. Accessed 27 Sep. 2024.
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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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