One who imposes on others; a person who assumes a character for the purpose of deception; a deceiver under a false character. It seems to be yet unsettled, whether Perkin Warbeck was an impostor A religious impostor may be one who assumes the character of a preacher, without authority; or one who falsely pretends to an extraordinary commission from heaven, and terrifies people with denunciations of judgments.

One who imposes upon others; a person who assumes a character or title not his own, for the purpose of deception; a pretender.

The condition, character, or practice of an impostor.