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
There was the escalating lunacy of Sal and Quinn’s backlot power struggle, up to and including a hurled burrito.
—
Joe Reid, Vulture, 30 Aug. 2025
Yang is genius not just for playing the easy pickins of George Santos but high-concept lunacy like a gay oompaloompa and the iceberg that sunk the Titanic.
—Steven Zeitch, HollywoodReporter, 20 Aug. 2025
Rooker unsurprisingly embraces the lunacy of his character, who dresses in Native American drag and tastes bird poop to track his prey.
—Alan Sepinwall, Rolling Stone, 15 Aug. 2025
The show, like so much of Judge’s work, simply moves at the steady, grinding, uneventful pace of life, despite the increasing lunacy of its situational antics.
—Derek Robertson, The Washington Examiner, 15 Aug. 2025
See All Example Sentences for lunacy
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Joe Reid, Vulture, 30 Aug. 2025
Yang is genius not just for playing the easy pickins of George Santos but high-concept lunacy like a gay oompaloompa and the iceberg that sunk the Titanic.
—Steven Zeitch, HollywoodReporter, 20 Aug. 2025
Rooker unsurprisingly embraces the lunacy of his character, who dresses in Native American drag and tastes bird poop to track his prey.
—Alan Sepinwall, Rolling Stone, 15 Aug. 2025
The show, like so much of Judge’s work, simply moves at the steady, grinding, uneventful pace of life, despite the increasing lunacy of its situational antics.
—Derek Robertson, The Washington Examiner, 15 Aug. 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 10 Sep. 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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