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

  • adj. Mentally ill; insane.
  • adj. Suffering from dementia or a loss of cognitive function.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Insane or mentally ill.
  • adj. Suffering from dementia.
  • v. Simple past tense and past participle of dement.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Insane; mad; of unsound mind.

from The Century Dictionary and Cyclopedia

  • Having lost the normal use of the reason; insane; specifically, afflicted with or characterized by dementia.

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

  • adj. affected with madness or insanity


Sorry, no etymologies found.


  • The word 'demented' like 'nutter' or 'lunatic' is a real barrier to sufferers, such as myself, in discussing mental illness, and so overcoming the terrible awkwardness that makes us feel like social lepers.

    The Guardian World News

  • Your use of the word 'demented' is not totally surprising, given how pervasive and entrenched the mythology about the poet is out there (and how easy it has been for centuries to automatically label gifted, creative women who behave differently as 'demented').

    A reader requests . . .

  • Too bad dr demented is too dense to understand what you are trying to say to them ..

    Think Progress » Rove Falsely Claims Bush Administration Never Said Iraqi Oil Revenue Would Help Pay For War

  • I swear dr demented is going to drive me insane one of these days …

    Think Progress » Tea Party Movement As Popular As Socialism

  • Mr. Gülen's followers say the real conspirators are instead members of the so-called Deep State — what they call a demented, multitentacled secret alliance of high-level figures in the military, the intelligence services, the judiciary and organized crime.

    A Nation of Conspiracies

  • Her curiously juvenile prattle — "The way it began, it was a bit like a repeat of earlier," she begins one anecdote — and her worshipful obsession with all things Hailshamite quickly make it clear that Kathy, if not demented, is at least imperfectly removed from her schoolgirl self; and as she rabbits on, the oddness of her schooldays becomes increasingly apparent.

    New Fiction

  • In what I can only describe as one of the most overly animated, gesticulating, face contorting diatribes I have ever witnessed, Professor Rabkin loudly proclaimed that the mood of the people in the room was "demented" -.

    Neo-cons Not Aware of Any Impeachable Offenses

  • Ok I’m baaaack and Im happy to report that dr demented is officially getting his ass handed to him on the mississippi thread!

    Think Progress » Lieberman Gets A Chuckle Out Of Peddling Far-Right Nuke Myth

  • FROM MTV. COM: My favorite Norwegian black-metal story, well-known by now to connoisseurs of the demented, is the one about the singer called — prophetically, as it turned out — Dead.

    Kurt Loder Reviews ‘Until The Light Takes Us’ » MTV Movies Blog

  • It's hard to write love poetry without sounding sappy or just plain demented.

    If You Forget Me


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