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personality disorder

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noun Psychiatry.
  1. any of a group of mental disorders characterized by deeply ingrained maladaptive patterns of behavior and personality style, which are usually recognizable as early as adolescence and are often lifelong in duration.
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Origin of personality disorder

First recorded in 1935–40
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for personality disorder

personality disorder

noun
  1. psychiatry any of a group of mental disorders characterized by a permanent disposition to behave in ways causing suffering to oneself or others
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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

personality disorder in Medicine

personality disorder

n.
  1. Any of a group of disorders in which patterns of perceiving, relating to, and thinking about one's self and one's environment interfere with the long-term functioning of an individual, often manifested in deviant behavior and lifestyle.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

personality disorder in Science

personality disorder

[pûr′sə-nălĭ-tē]
  1. Any of a group of psychiatric disorders in which a person's abnormal self-perception or ability to relate to others results in undesirable behaviors and interferes with normal social and emotional functioning.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.