multiple personality disorder

noun

Definition of multiple personality disorder

: a disorder that is characterized by the presence of two or more distinct and complex identities or personality states each of which becomes dominant and controls behavior from time to time to the exclusion of the others and results from disruption in the integrated functions of consciousness, memory, and identity

— called also multiple personality, dissociative identity disorder

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But these different views make Petipa seem to have multiple personality disorder. — Alastair Macaulay, New York Times, "The Changing Shape of American Ballet Theater," 5 July 2018 Once, Deborah told her daughter she had been diagnosed with multiple personality disorder. — TIME.com, "Instagram Photographer of 2017," 20 Dec. 2017 Turner studied schizophrenia and multiple personality disorders to prepare for this difficult, volatile role. — Erica Gonzales, Harper's BAZAAR, "See Sophie Turner Like You've Never Seen Her in X-Men: Dark Phoenix," 7 Dec. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'multiple personality disorder.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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The first known use of multiple personality disorder was in 1972

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multiple personality disorder

noun

Medical Definition of multiple personality disorder

: a dissociative personality disorder that is characterized by the presence of two or more distinct and complex identities or personality states each of which becomes dominant and controls behavior from time to time to the exclusion of the others —abbreviation MPD

— called also alternating personality, dissociative identity disorder