lunatic

adjective

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lu·na·tic | \ ˈlü-nə-ˌtik

Definition of lunatic

1 dated

a : affected with a severely disordered state of mind : insane

b : designed for the care of mentally ill people a lunatic asylum

2 : wildly foolish a lunatic idea lunatic behavior

Other Words from lunatic Synonyms & Antonyms More Example Sentences Phrases Containing lunatic Learn More About lunatic

Examples of lunatic in a Sentence

He hatched a lunatic plot to overthrow the government. another of his lunatic ideas

Recent Examples on the Web Having long since given up on reigning in the enormous lunatic wing of their party, Republican leaders had, particularly after the rise of Donald Trump, began actively catering to it. — Alex Shephard, The New Republic, 20 Apr. 2022 The point of such a response would be to portray the Democrats as the reasonable party upholding moderation and decency in the face of a lunatic assault on the rights and freedoms of the female half of the population. — Damon Linker, The Week, 1 Apr. 2022 After the trial, Tyler was sent to lunatic asylum [sic] receiving psychological treatment. — Patrick Frater, Variety, 7 Feb. 2022 After the trial, Tyler was sent to lunatic asylum [sic] receiving psychological treatment. — Patrick Frater, Variety, 7 Feb. 2022 Marjorie Taylor Greene, the lunatic Georgia MAGA congressman who only recently stopped loving QAnon and thinks that Jewish space lasers might be starting wildfires out west, is one of the right’s biggest stars. — Alex Shephard, The New Republic, 28 Feb. 2022 After the trial, Tyler was sent to [a] lunatic asylum receiving psychological treatment. — Michelle Toh, Nectar Gan, And Cnn's Beijing Bureau, CNN, 7 Feb. 2022 After the trial, Tyler was sent to lunatic asylum [sic] receiving psychological treatment. — Patrick Frater, Variety, 7 Feb. 2022 After the trial, Tyler was sent to (a) lunatic asylum receiving psychological treatment. — Bryan Alexander, USA TODAY, 27 Jan. 2022 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'lunatic.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.