Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Of, exhibiting, or afflicted with insanity.
  • adj. Characteristic of or associated with persons afflicted with insanity: an insane laugh; insane babbling.
  • adj. Intended for use by such persons: an insane asylum.
  • adj. Immoderate; wild: insane jealousy.
  • adj. Very foolish; absurd: took insane risks behind the wheel.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Exhibiting unsoundness or disorder of mind; not sane; mad; deranged in mind; delirious; distracted.
  • adj. Used by, or appropriated to, insane persons; as, an insane hospital.
  • adj. Causing insanity or madness.
  • adj. Characterized by insanity or the utmost folly; chimerical; unpractical; as, an insane plan, attempt, etc.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Exhibiting unsoundness or disorder of mind; not sane; mad; deranged in mind; delirious; distracted. See insanity, 2.
  • adj. Used by, or appropriated to, insane persons.
  • adj. Causing insanity or madness.
  • adj. Characterized by insanity or the utmost folly; chimerical; unpractical

from The Century Dictionary and Cyclopedia

  • Not sane; unsound or deranged in mind; crazy.
  • Characteristic of a person mentally deranged; hence, wild; insensate; senseless.
  • Devoted to the use or care of the insane: as, an insane asylum.
  • Making insane; causing insanity.
  • Synonyms Crazed, lunatic, demented, maniacal.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. very foolish
  • adj. afflicted with or characteristic of mental derangement

Etymologies

Latin īnsānus : in-, not; see in-1 + sānus, sane, healthy.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin īnsānus ("unsound in mind; mad, insane"), from in- + sānus ("sound, sane"). (Wiktionary)

Examples

  • The term insane is outdated parlance in the mental health community.

    The Full Feed from HuffingtonPost.com

  • Under Section 16 of Canada's Criminal Code, a person is deemed to be not criminally responsible the term 'insane' having been scrapped if the crime was committed while "suffering from a mental disorder that rendered the person incapable of appreciating the nature and quality of the act or omission or of knowing that it was wrong."

    CBC | Top Stories News

  • when hitler started the pracitice of euthenasia he started with his own people in the insane asylums, and the term insane back then is not what we consider it to be now.. a kid with ADD or midly slow could be "put down".. all part of the "not fit to work not fit for life" campiagn.

    Yahoo! News: Business - Opinion

  • He remembers what he calls the "insane" calculus of Mutually Assured Destruction, which dominated Cold War policy.

    Fearsome Peacekeepers

  • Look at what I call the insane spending of government in America.

    The Relentless Conservative: If Europe Is a Bellwether for America: Economic Ruin... Comin' Right Up!

  • I think the word insane is appropriate in your blog, however awesome?

    If you pay them enough, they'll massage your feet with any of them sauces

  • She did not manage to get the word "insane" out, for another wave of agony hit her, far worse than the previous.

    Dark Allies

  • As a matter of fact, the doctor, when he came the next day, was in a towering rage with Mrs. Van Shaw over what he called her insane yielding to the request of a delirious patient.

    The High Calling

  • LOS ANGELES Reuters - Groupon Inc CEO Andrew Mason, lashing out at what he called "insane" and "hilarious" criticism in the media, defended the daily-deals website's record and growth strategy in a lengthy memo to employees on Thursday.

    Reuters: Press Release

  • Groupon CEO Andrew Mason, lashing out at what he called "insane" and "hilarious" criticism in the media, defended the daily-deals website's record and growth strategy in a lengthy memo to employees on Thursday.

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