loony

adjective

loo·​ny ˈlü-nē How to pronounce loony (audio)
variants or less commonly looney
loonier; looniest
Synonyms of loonynext
: foolish, eccentric
looniness noun
loony noun
plural loonies

Synonyms of loony

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Examples of loony in a Sentence

Every family includes someone who's a little loony. that's got to be the looniest idea I've ever heard
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
None of them care what their grandiose and loony ideas cost ordinary people. — Susan Shelley, Daily News, 16 Apr. 2025 Dark loony New York comedy, but still. — Bill Goodykoontz, AZCentral.com, 27 Aug. 2025 Hong Kong audiences didn’t completely vibe with the film’s loony superhero shtick upon its release. — Vikram Murthi, Vulture, 4 Mar. 2024 The Lost Boys, like First Shadow and Harry Potter and the Cursed Child, goes for broke in embracing the admittedly loonier side of their chiller-thriller adventures. — Greg Evans, Deadline, 26 Apr. 2026 See All Example Sentences for loony

Word History

Etymology

by shortening & alteration from lunatic

First Known Use

1841, in the meaning defined above

Time Traveler
The first known use of loony was in 1841

Phrases Containing loony

Rhymes for loony

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Browse Nearby Words

loonie
loony
loony bin
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Cite this Entry

“Loony.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/loony. Accessed 7 Jul. 2026.

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Kids Definition

loony

adjective
loo·​ny
variants also looney
ˈlü-nē How to pronounce loony (audio)
loonier; looniest
: very foolish or eccentric
looniness noun
loony noun
Etymology

an altered form of lunatic (adjective)

More from Merriam-Webster on loony

Nglish: Translation of loony for Spanish Speakers

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