dissociative identity disorder
noun
: a 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 and that results from disruption in the integrated functions of consciousness, memory, and identity : multiple personality disorder
Note: The term dissociative identity disorder is now preferred over multiple personality disorder especially in medical contexts.
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“Dissociative identity disorder.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/dissociative%20identity%20disorder. Accessed 7 Jul. 2026.
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