D defs.my
Entry 1 sense Webster, 1913

Impostor

/ĭmˌ-pôs'-tẽr/ · Im·pos·tor · IPA /ɪmˈpɑstɚ/
01 n. One who imposes upon others; a person who assumes a character or title not his own, for the purpose of deception; a pretender.
  1. 1.
    One who imposes upon others; a person who assumes a character or title not his own, for the purpose of deception; a pretender.
Syn. Deceiver; cheat; rogue. See Deceiver.