Thesaurus

insane

adjective

Synonyms & Antonyms of insane

1 having or showing a very abnormal or sick state of mind
  • only an insane person would intentionally jump off a skyscraper

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2 conceived or made without regard for reason or reality
  • a completely insane plan to build an opera house in the middle of nowhere

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3 showing or marked by a lack of good sense or judgment
  • an insane plan to blow all of their savings on lottery tickets

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4 going beyond a normal or acceptable limit in degree or amount
  • wanted an insane amount of money to paint our house

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Time Traveler for insane

Time Traveler

The first known use of insane was in 1575

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Cite this Entry

“Insane.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/insane. Accessed 16 May. 2021.

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More from Merriam-Webster on insane

Dictionary: Definition of insane

Medical Dictionary: Definition of insane

Nglish: Translation of insane for Spanish Speakers

Britannica English: Translation of insane for Arabic Speakers

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