insane

[ in-seyn ]
/ ɪnˈseɪn /

adjective

not sane; not of sound mind; mentally deranged.
of, relating to, or characteristic of a person who is mentally deranged: insane actions; an insane asylum.
utterly senseless: an insane plan.

QUIZZES

DO YOU KNOW THIS VOCABULARY FROM "THE HANDMAID'S TALE"?

"The Handmaid's Tale" was required reading for many of us in school. Everyone else has probably watched the very popular and addictive TV show. Do you remember this vocabulary from the book, and do you know what these terms mean?
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decorum

Origin of insane

From the Latin word insānus, dating back to 1550–60. See in-3, sane

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. 2020

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.