Im*pos"tor (?), n. [L. impostor
a deceiver, fr. imponere to impose upon, deceive. See
Impone.] One who imposes upon others; a person who
assumes a character or title not his own, for the purpose of
deception; a pretender. "The fraudulent impostor foul."
Milton.
Syn. -- Deceiver; cheat; rogue. See Deceiver.