insane

[ in-seyn ]
/ ɪnˈseɪn /
SEE SYNONYMS FOR insane ON THESAURUS.COM

adjective

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Origin of insane

First recorded in1550–60; 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

Words nearby insane

INS, in saecula saeculorum, insalivate, insalubrious, ins and outs, insane, insanitary, insanitation, insanity, insatiable, insatiate
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Words related to insane

crazy, irrational, paranoid, nuts, irresponsible, senseless, idiotic, preposterous, psychotic, mad, batty, bizarre, deranged, cracked, crazed, cuckoo, daft, demented, fatuous, frenzied

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.