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split personality

See more synonyms for split personality on Thesaurus.com
noun
  1. multiple personality.

Origin of split personality

First recorded in 1925–30
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for split personality

split personality

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
split personality in Medicine

split personality

n.
  1. Multiple personality. No longer in scientific use.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.