Noah Webster's Dictionary (n.) The act or conduct of an impostor; deception practiced under a false or assumed character; fraud or imposition; cheating.

Multi-Version Concordance Imposture (1 Occurrence) Matthew 27:64 So give orders for the sepulchre to be securely guarded till the third day, for fear his disciples should come by night and steal the body, and then tell the people that he has come back to life; and so the last imposture will be more serious than the first." (WEY)