1
as in insanity
a foolish act or idea
you want to sneak into the building after the alarm is set—what lunacy!
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Antonyms & Near Antonyms
2
as in dementia
a serious mental disorder that prevents one from living a safe and normal life
the judge ruled that the lunacy of the accused made him incompetent to stand trial
Synonyms & Similar Words
Antonyms & Near Antonyms
3
as in madness
lack of good sense or judgment
was it desperation or lunacy that caused him to quit his job and move to California without any plan for what to do when he got there?
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Antonyms & Near Antonyms
Example Sentences
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Recent Examples of lunacy
Once upon a time, the idea of a baseball team allowing most of its games to be broadcast on television was lunacy.
—
Ken Sugiura,
AJC.com,
24 Feb. 2026
Because it’s invariably attached to the idea of some kind of lunacy.
—
Zack Sharf,
Variety,
3 Nov. 2025
Because it's invariably attached to the idea of some kind of lunacy.
—
Mekishana Pierre,
Entertainment Weekly,
3 Nov. 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
See All Example Sentences for lunacy
Ken Sugiura,
AJC.com,
24 Feb. 2026
Because it’s invariably attached to the idea of some kind of lunacy.
—
Zack Sharf,
Variety,
3 Nov. 2025
Because it's invariably attached to the idea of some kind of lunacy.
—
Mekishana Pierre,
Entertainment Weekly,
3 Nov. 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
See All Example Sentences for lunacy
Recent Examples of Synonyms for lunacy
Noun
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Piggott was found not guilty by reason of insanity in a trial held a year later.
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Florida Attorney General James Uthmeier is calling for the impeachment of the Miami-Dade judge who acquitted a woman by reason of insanity in the 2021 death of her 15-month-old daughter, arguing the ruling threatens public safety.
Noun
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Omega-3 polyunsaturated fatty acids have been shown to lower blood pressure, boost good cholesterol, maintain cell health, and reduce the risk for cancer, dementia, and Alzheimer's disease.
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Those who need it can also get behavioral health and dementia care.
Noun
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Is this just a salary dump, or is there a method to the madness for the Wolves?
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Welcome to the Amazon Prime Day 2026 madness!
Noun
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That’s the level of idiocy in the Los Angeles city government.
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The idiocy of these people knows no bounds.
Noun
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It was judged to be some sort of mass hysteria.
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The virtual hysteria over the muskrat invasion resulted in Britain’s first legislation to target a non-native invasive species.
Noun
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Brooks also taught Wilder how to take something funny, push it all the way to the point of absurdity, then keep going.
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The second lady is perhaps the most interesting figure in Trumpworld right now, and certainly the only one who understands the absurdity of it all.
Noun
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Write with simplicity and heart.
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That distinction is important because the company sees simplicity as one of its greatest strengths.
Noun
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The forecast for Thursday calls for craziness.
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Meanwhile, the Spurs had to rush off the court to avoid getting caught up in all the craziness.
Cite this Entry
“Lunacy.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/lunacy. Accessed 1 Jul. 2026.
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