de·ment·ed

[dih-men-tid]
adjective
1.
crazy; insane; mad.
2.
affected with dementia.
Origin:
1635–45; dement + -ed2

Related forms
de·ment·ed·ly, adverb
de·ment·ed·ness, noun
half-de·ment·ed, adjective
sem·i·de·ment·ed, adjective

Synonyms
1. lunatic, crazed, deranged, unbalanced.
Dictionary.com Unabridged

de·ment

[dih-ment]
verb (used with object) Obsolete.
to make mad or insane.
Origin:
1535–45; < Late Latin dēmentāre to deprive of mind, equivalent to Latin dēment- (stem of dēmēns) out of one's mind (dē- de- + ment- (stem of mēns) mind) + -āre infinitive suffix

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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Collins
World English Dictionary
dement (dɪˈmɛnt) [Click for IPA pronunciation guide]
 
—vb
1.  (intr) to deteriorate mentally, esp because of old age
2.  rare (tr) to drive mad; make insane
 
[C16: from Late Latin dēmentāre to drive mad, from Latin de- + mēns mind]

demented (dɪˈmɛntɪd) [Click for IPA pronunciation guide]
 
—adj
mad; insane
 
de'mentedly
 
—adv
 
de'mentedness
 
—n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

demented
1640s, from obsolete dement "drive mad."

dement
1540s, "to drive mad," probably from M.Fr. dementer, from L.L. dementare "out of one's mind," from phrase de mente, from de + mente, ablative of mens mind" (see mind (n.)).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

demented de·ment·ed (dĭ-měn'tĭd)
adj.

  1. Mentally ill; insane.

  2. Suffering from dementia.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Slang Dictionary

demented

adj. Yet another term of disgust used to describe a malfunctioning program. The connotation in this case is that the program works as designed, but the design is bad. Said, for example, of a program that generates large numbers of meaningless error messages, implying that it is on the brink of imminent collapse. Compare wonky, brain-damaged, bozotic.
Jargon
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FOLDOC
Computing Dictionary

demented definition


Yet another term of disgust used to describe a program. The connotation in this case is that the program works as designed, but the design is bad. Said, for example, of a program that generates large numbers of meaningless error messages, implying that it is on the brink of imminent collapse.
[Jargon File]
(1994-12-07)

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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Example sentences
Getting kids more active would also help, and one of the biggest obstacles here
  is our demented tort system.
The scene was straight out of sci-fi: huge, metallic birds coming home to nest
  with a demented roar.
Another pause, and he broke out again like one demented.
Nothing can be done about such demented creatures, than the treatment they
  truly deserve.
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