The Collaborative International Dictionary of English v.0.48:

Personation \Per`son*a"tion\, n.
   The act of personating, or conterfeiting the person or
   character of another; impersonation.
   [1913 Webster]

WordNet (r) 3.0 (2006):

personation
    n 1: imitating the mannerisms of another person [syn:
         impersonation, personation]
    2: acting the part of a character on stage; dramatically
       representing the character by speech and action and gesture
       [syn: portrayal, characterization, enactment,
       personation]