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
In its earlier days, its satire hit our funny bones by exaggerating the absurdities of our existences into unlikely lunacies.
—
Steven Levy, WIRED, 3 May 2024
Isolated from her people in a garish palace, there’s some logic in Elena seeking out someone like Herbert as an anchor, but his quirks merely add to the lunacy, clouding who’s really manipulating whom.
—Brian Lowry, CNN, 1 Mar. 2024
See all Example Sentences for lunacy 
Steven Levy, WIRED, 3 May 2024
Isolated from her people in a garish palace, there’s some logic in Elena seeking out someone like Herbert as an anchor, but his quirks merely add to the lunacy, clouding who’s really manipulating whom.
—Brian Lowry, CNN, 1 Mar. 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 31 May. 2024.
Copy CitationKids Definition
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
Love words? Need even more definitions?
Merriam-Webster unabridged
Share