insane

adjective
in·​sane | \ (ˌ)in-ˈsān How to pronounce insane (audio) \

Definition of insane

1a(1) : exhibiting a severely disordered state of mind : affected with mental illness
(2) law : affected with insanity (see insanity sense 2) criminally insane
b : unable to think in a clear or sensible way : crazy insane with jealousy not used technically
2 : used by, typical of, or intended for mentally ill people an insane asylum
3 : absurd an insane scheme for making money
4 informal : outrageously high or extreme making insane amounts of money The monster truck pursued him at insane speeds … More than 22,000 athletes descend on Philadelphia's Franklin Field to chug insane amounts of Gatorade …— Chris Ballard also : exceptionally good or impressive Minnesota … has blazed out to an insane start, taking an early lead in the Northwest Division. — Tom Wheatley With his rough-edged baritone and ear for insane hooks, [reggae singer] Baby Cham always sounds wicked. — Rob Kenner

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Other Words from insane

insanely adverb
insaneness \ (ˌ)in-​ˈsān-​nəs How to pronounce insaneness (audio) \ noun

Synonyms & Antonyms for insane

Synonyms

Antonyms

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Examples of insane in a Sentence

The murderer was found to be criminally insane. She was insane with jealousy. He had an insane look in his eyes. She likes to drive at insane speeds. He had this insane idea that he could get rich by selling old computers.
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Recent Examples on the Web Considering the Dot alone costs $49.99 and Amazon Music Unlimited is $9.99/month, this is insane. Samantha Gordon, USA TODAY, "The 25 products our readers loved most in October," 30 Oct. 2019 There are a lot of burning questions about what’s to come for the fictional characters of the show (um, hello, that finale was insane). Megan Stein, Country Living, "Is the 'New Amsterdam' Hospital Real and Is the Show Based on a True Story?," 24 Sep. 2019 Worst of all, the cult of lethality attempts to divorce the how of killing from the why, an insane proposition given that military force is deployed in the service of political outcomes. Jared Keller, The New Republic, "James Mattis’s Bizarre Cult of “Lethality”," 9 Sep. 2019 He was ruled criminally insane and committed to a state mental institution. Cnn Library, CNN, "Mass Shootings in the US Fast Facts," 20 Aug. 2019 Our gun lobby compliant political leaders must stop looking the other way as the criminally insane and evil people access those weapons and kill us. Phillip Morris, cleveland.com, "A motorcycle has now become the sum of our fears: Phillip Morris," 11 Aug. 2019 Dust off those CVs, guys, because this would be the (probably insane and exhausting) opportunity of a lifetime. Katherine J. Igoe, Marie Claire, "If You're Really Good at Managing Calendars, Kate Middleton's Looking for a New Diary Coordinator," 10 July 2019 He was institutionalized, but after several breakouts from Austin State Hospital, he was transferred to the maximum security Rusk State Hospital for the criminally insane and given shock treatments and Thorazine. Tom Maxwell, Longreads, "Remembering Roky Erickson," 7 June 2019 Founder and then-CEO Steve Jobs, and other Apple dignitaries, attended its opening, and for years TV crews have perched outside of it to document the insane lines that build up with each new iPhone launch. Mike Murphy, Quartz, "Apple’s iconic cube on New York’s Fifth Avenue is back—and in color," 6 Sep. 2019

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

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First Known Use of insane

1575, in the meaning defined at sense 1a(1)

History and Etymology for insane

Latin insanus, from in- + sanus sane

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Time Traveler for insane

Time Traveler

The first known use of insane was in 1575

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Statistics for insane

Last Updated

11 Nov 2019

Cite this Entry

“Insane.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/insane?pronunciation&lang=en_us&dir=i&file=insane01. Accessed 21 November 2019.

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More Definitions for insane

insane

adjective
How to pronounce insane (audio)

English Language Learners Definition of insane

: having or showing severe mental illness
: unable to think in a clear or sensible way
used in the phrase drive/make (someone) insane to describe annoying or bothering someone very much.

insane

adjective
in·​sane | \ in-ˈsān How to pronounce insane (audio) \

Kids Definition of insane

1 : not normal or healthy in mind
2 : used by or for people who are insane an insane asylum
3 : very foolish or unreasonable

Other Words from insane

insanely adverb

insane

adjective
in·​sane | \ (ˈ)in-ˈsān How to pronounce insane (audio) \

Medical Definition of insane

dated
1 : exhibiting a severely disordered state of mind : affected with mental illness
2 : used by, typical of, or intended for mentally ill people an insane asylum

Other Words from insane

insanely adverb

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insane

adjective
in·​sane

Legal Definition of insane

: affected with insanity

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More from Merriam-Webster on insane

Thesaurus: All synonyms and antonyms for insane

Spanish Central: Translation of insane

Nglish: Translation of insane for Spanish Speakers

Britannica English: Translation of insane for Arabic Speakers

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