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insane

[ in-seyn ]
/ ɪnˈseɪn /
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See synonyms for: insane / insanely / insaneness on Thesaurus.com

adjective

QUIZZES

QUIZ YOURSELF ON “THEIR,” “THERE,” AND “THEY’RE”

Are you aware how often people swap around “their,” “there,” and “they’re”? Prove you have more than a fair grasp over these commonly confused words.
Question 1 of 7
Which one of these commonly confused words can act as an adverb or a pronoun?

Origin of insane

First recorded in 1550–60; from Latin insānus “unsound (of mind), demented, frenzied”; see origin at in-3, sane

synonym study for insane

5. See mad.

OTHER WORDS FROM insane

in·sane·ly, adverbin·sane·ness, nounpseu·do·in·sane, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

Example sentences from the Web for insane

British Dictionary definitions for insane

insane
/ (ɪnˈseɪn) /

adjective

  1. mentally deranged; crazy; of unsound mind
  2. (as collective noun; preceded by the)the insane
characteristic of a person of unsound mindan insane stare
irresponsible; very foolish; stupid

Derived forms of insane

insanely, adverbinsaneness, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for insane

insane
[ ĭn-sān ]

adj.

Of, exhibiting, or afflicted with insanity.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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