lunatic 1 of 2

adjective

Definition of lunaticnext
informal
as in foolish
showing or marked by a lack of good sense or judgment such lunatic clowning during a solemn ceremony is completely inappropriate

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Antonyms & Near Antonyms

lunatic

2 of 2

noun

informal
as in fool
a person who lacks good sense or judgment No, you can't ski off the roof, you lunatic!

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Antonyms & Near Antonyms

Example Sentences

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.
Recent Examples of lunatic
Adjective
On one end are the extremists, who want to enact lunatic measures like repealing the 19th Amendment. — Ivana Greco, Washington Post, 26 Feb. 2026 In the late 19th century, it was commonly believed that a criminal or lunatic could be recognized at a glance, based on certain physiognomic tells. — Adam Kirsch, The Atlantic, 15 June 2026
Noun
People have been hurt so badly by radical left lunatics that worked for the Biden administration and Sleepy Joe. — NBC news, 7 June 2026 Secretary of State Marco Rubio wasn’t far behind, saying the war is being waged against religious lunatics. — Sun Sentinel Editorial Board, Sun Sentinel, 25 Mar. 2026 See All Example Sentences for lunatic
Recent Examples of Synonyms for lunatic
  1. insane
  2. fool
  3. stupid
  4. maniac
  5. mad
  6. goose
  7. foolish
  8. moron
Adjective
  • For example, Fred Again is absolutely doing insane things with the MPC Lives.
    — Preezy Brown, VIBE.com, 30 June 2026
  • That dwarfs anything the powerhouse Spain teams did in the early 2010s, when the team was known for stringing together an insane number of passes that led to a goal.
    — Pete Grathoff, Kansas City Star, 29 June 2026
Definition of insane
Noun
  • Being a gent or a supplicant wasn’t the same as being a fool, though.
    — Nicholas Quah, Vulture, 29 June 2026
  • Don’t let the simple style fool you, though, because the ultra-soft foam insoles provide solid arch support.
    — Caitlyn Fitzpatrick, PEOPLE, 29 June 2026
Definition of fool
Adjective
  • And no, that was NOT OutKick or FOX who wrote that stupid headline.
    — Zach Dean OutKick, FOXNews.com, 3 July 2026
  • The thing about House of the Dragon is that everything really is quite stupid.
    — Nicholas Quah, Vulture, 29 June 2026
Definition of stupid
Noun
  • Mantzoukas was willing to look like a maniac and a moron in equal measure.
    — Roxana Hadadi, Vulture, 17 June 2026
  • The Martin Lawrence vehicle Martin, which ran for five glorious seasons, offered a terrific platform for Lawrence to run around like a maniac as an energetic radio DJ.
    — Jordan Hoffman, Entertainment Weekly, 8 June 2026
Definition of maniac
Adjective
  • Getting mad about missing out on signing Anfernee Simons won’t change that.
    — Nick Friedell, New York Times, 4 July 2026
  • When World Cup season descends upon soccer-mad Brazil, green and yellow banners decorate restaurants, bars and apartment buildings, streets are painted with flags and soccer balls, and discussions of the beloved national team's games are ubiquitous.
    — ABC News, ABC News, 3 July 2026
Definition of mad
Noun
  • The list goes on, though; roast goose and crispy fried pigeon star on the menu at The Legacy House, and stylish couples swish into DarkSide for live jazz even on most evenings.
    — Condé Nast, Condé Nast Traveler, 29 June 2026
  • Organic cotton and goose down in three firm varieties mean there’s a suitable fill for stomach, back, and side sleepers alike.
    — Yelena Moroz Alpert, Architectural Digest, 26 June 2026
Definition of goose
Adjective
  • Comparing Young’s new deal to any extension for Davis would be a foolish exercise.
    — Josh Robbins, New York Times, 30 June 2026
  • Further, Plato’s disdain for Gorgias, Antisthenes’ first teacher, and sophistry in general is clear; in the Platonic dialogue Gorgias, the titular character is made out to be rather foolish.
    — Theodore McDarrah, Forbes.com, 26 June 2026
Definition of foolish
Noun
  • Mantzoukas was willing to look like a maniac and a moron in equal measure.
    — Roxana Hadadi, Vulture, 17 June 2026
  • Lluís then calls Puig Antich a moron.
    — Colm Tóibín, The Atlantic, 14 Mar. 2026
Definition of moron

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Cite this Entry

“Lunatic.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/lunatic. Accessed 8 Jul. 2026.

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More from Merriam-Webster on lunatic

Nglish: Translation of lunatic for Spanish Speakers

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