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mental illness

noun
1.
any of the various forms of psychosis or severe neurosis.
Also called mental disorder, mental disease.
Origin
1960-1965
1960-65
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for mental disorder
  • Your anger symptoms are not better accounted for by another mental disorder.
  • Millions of healthy people could be labeled with a mental disorder and treated with potentially dangerous drugs, some say.
  • In extreme cases, the expression may be characterized as a mental disorder.
British Dictionary definitions for mental disorder

mental disorder

noun
1.
(law) (in England, according to the Mental Health Act 1983) mental illness, arrested or incomplete development of mind, psychopathic disorder, or any other disorder or disability of the mind
Derived Forms
mentally disordered, adjective

mental illness

noun
1.
any of various disorders in which a person's thoughts, emotions, or behaviour are so abnormal as to cause suffering to himself, herself, or other people
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
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mental disorder in Medicine

mental disorder n.
See mental illness.

mental illness n.
Any of various disorders characterized chiefly by abnormal behavior or an inability to function socially, including diseases of the mind and personality and certain diseases of the brain. Also called mental disease, mental disorder.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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mental disorder in Science
mental illness
  (měn'tl)   
Any of various psychiatric disorders or diseases, usually characterized by impairment of thought, mood, or behavior.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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