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mental illness

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noun
  1. any of the various forms of psychosis or severe neurosis.
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Origin of mental illness

First recorded in 1960–65
Also called mental disorder, mental disease.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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
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Derived Formsmentally 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
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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

mental disorder in Medicine

mental disorder

n.
  1. mental illness

mental illness


mental disorder in Science

mental illness

[mĕntl]