variants:
or less commonly multiple personality
Definition of multiple personality disorder
: 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 results from disruption in the integrated functions of consciousness, memory, and identity : dissociative identity disorder
Note: The term dissociative identity disorder is now preferred over multiple personality disorder and multiple personality especially in medical contexts.
Test Your Vocabulary
Words Named After People
-
- Namesake of the leotard, Jules Léotard had what profession?

Test your vocabulary with our 10-question quiz!
TAKE THE QUIZ
A daily challenge for crossword fanatics.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Share multiple personality disorder
Time Traveler for multiple personality disorder
The first known use of multiple personality disorder was in 1972
See more words from the same year