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Synonyms

split personality

American  

noun

  1. multiple personality.

split personality British  

noun

  1. the tendency to change rapidly in mood or temperament

  2. a nontechnical term for multiple personality

"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

Etymology

Origin of split personality

First recorded in 1925–30

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Pelicot's own defence lawyer, Beatrice Zavarro, enthusiastically embraced the "split" personality theory in her closing arguments at the trial.

From BBC • Dec. 20, 2024

The Captain is a split personality in other ways.

From Los Angeles Times • Apr. 13, 2024

The hall of mirrors, the split personality, the hidden life.

From New York Times • Jun. 3, 2023

The film's split personality is a problem because it wants to be original, and it ends up being overly familiar.

From Salon • May 12, 2023

“He’s got a split personality when he puts on that helmet.”

From "Friday Night Lights: A Town, A Team, And A Dream" by H.G. Bissinger

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.