Meaning of the word impostor in English

What does impostor mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

impostor

US /ɪmˈpɑː.stɚ/
UK /ɪmˈpɒs.tər/

Noun

a person who pretends to be someone else in order to deceive others, especially for fraudulent gain

Example:
The police arrested the impostor who had been posing as a doctor.
He felt like an impostor at the fancy party, despite his success.