'Imitator' definitions:

Definition of 'imitator'

From: WordNet
noun
Someone who (fraudulently) assumes the appearance of another [syn: impersonator, imitator]
noun
Someone who copies the words or behavior of another [syn: copycat, imitator, emulator, ape, aper]

Definition of 'Imitator'

From: GCIDE
  • Imitator \Im"i*ta"tor\, n. [L.] One who imitates. [1913 Webster]