Other spellings imposter Pronunciation (UK) IPA (key): /ɪmˈpɒstə/ (US) IPA (key): /ɪmˈpɑstɚ/ Audio (US)(file) Hyphenation: im‧pos‧tor Noun Singular impostor Plural impostors (countable) An impostor is a person who pretends to be another person in order to deceive others. Wikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads