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Meaning of appersonation

ap•per•son•a•tion

Pronunciation: (a-pûr"su-nā'shun, u-pûr"-), [key]
— n. Psychiatry.
  1. the unconscious assumption of the personality characteristics of another, usually well known, person.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.