An impostor is someone who pretend to be someone else in order to deceive others. They might pretend to be someone famous or important in order to get their hands on valuable information.
The police are looking for an impostor who is pretending to be a detective.
The impostor was wearing a fake beard and glasses to look like the real doctor.
noun
a person who makes deceitful pretenses
Synonyms:
1
You are the nuisance and the impostor.
2
The rhetoric of the impostor is identical with his.
3
Selby is elected, and the impostor assumes the office.
4
That's probably where the impostor got the idea.
5
The impostor revealed himself to the Illuminati and was killed.
6
Hi, thanks for the notice about the possible impostor.
7
Your argument above is with the existence of the impostor category.
8
Apparently Julian Crane believed that the impostor was the real Martin.
9
He manages to kill the impostor guards and discovers the theft.
10
The Prince awakens on an island after the impostor destroys the ship.