multiple personality
Noun
Meaning
a relatively rare dissociative disorder in which the usual integrity of the personality breaks down and two or more independent personalities emerge
Source: WordNetSynonyms
Antonyms
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Examples
I was diagnosed with everything from schizophrenia to multiple personality disorder.
My significant other right now is myself, which is what happens when you suffer from multiple personality disorder and self-obsession.
A quick glance at the American left reveals a movement in the midst of a nervous breakdown, displaying behavior that goes beyond inconsistency into the realm of bipolar moods and multiple personality disorders.
The art of the novelist is not unrelated to the illness of multiple personality disorder. It's a much milder form. But the better the book, the nearer to the padded cell you are.
I think Madonna might have a multiple personality.
A multiple personality is in a certain sense normal.