variants
or less commonly looney
loonier; looniest
looniness
noun
loony
noun
plural loonies
Synonyms
- absurd
- asinine
- balmy
- brainless
- bubbleheaded
- cockeyed
- crackpot
- crazy
- cuckoo
- daffy
- daft
- dippy
- dotty
- fatuous
- featherheaded
- fool
- foolish
- half-baked
- half-witted
- harebrained
- inept
- insane
- jerky
- kooky
- kookie
- lunatic
- lunkheaded
- mad
- nonsensical
- nutty
- preposterous
- sappy
- screwball
- senseless
- silly
- simpleminded
- stupid
- tomfool
- unwise
- wacky
- whacky
- weak-minded
- witless
- zany
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
Advertisement Here are six movies that advanced the genre in 2024:
(Uncredited / Associated Press)
‘Longlegs’
Osgood Perkins wrote and directed this waking nightmare about Maika Monroe’s psychic FBI agent on the trail of ... if not quite a serial killer, the looniest murder influencer ever.
—
Bob Strauss, Los Angeles Times, 3 Dec. 2024
Harrelson has a small but impressively loony role as a crazed hermit who claims to anyone who will listen that the end of days is here.
—Tim Grierson, Vulture, 14 July 2024
One of our region's most famous comics, Michael Hawthorne, built a career from illustrating the loony loudmouth.
—Isaac Avilucea, Axios, 18 Oct. 2024
Holland treats the idea of a loony murderer’s spirit occupying a doll’s form with an uncommon seriousness.
—Declan Gallagher, EW.com, 15 Sep. 2024
See all Example Sentences for loony 
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Bob Strauss, Los Angeles Times, 3 Dec. 2024
Harrelson has a small but impressively loony role as a crazed hermit who claims to anyone who will listen that the end of days is here.
—Tim Grierson, Vulture, 14 July 2024
One of our region's most famous comics, Michael Hawthorne, built a career from illustrating the loony loudmouth.
—Isaac Avilucea, Axios, 18 Oct. 2024
Holland treats the idea of a loony murderer’s spirit occupying a doll’s form with an uncommon seriousness.
—Declan Gallagher, EW.com, 15 Sep. 2024
See all Example Sentences for loony
Dictionary Entries Near loony
Cite this Entry
“Loony.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/loony. Accessed 30 Dec. 2024.
Copy CitationKids Definition
loony
adjective
loo·ny
variants
also looney
loonier; looniest
: very foolish or eccentric
looniness
noun
loony
noun
Etymology
an altered form of lunatic (adjective)
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