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Synonyms

impostor

American  
[im-pos-ter] / ɪmˈpɒs tər /
Or imposter

noun

impostors plural
  1. a person who practices deception under an assumed character, identity, or name.


impostor British  
/ ɪmˈpɒstə /

noun

  1. a person who deceives others, esp by assuming a false identity; charlatan

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Noun Inflected Forms

Etymology

Origin of impostor

1580–90; < Late Latin, equivalent to Latin impos ( i )-, variant stem of impōnere to deceive, place on ( see impone) + -tor -tor

Vocabulary lists containing impostor

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Impostor syndrome means you’re still holding onto the person you were before.

From Los Angeles Times • Dec. 16, 2025

Re: Impostor: In my experience, people who have impostor syndrome are often the most qualified.

From Washington Post • Aug. 22, 2022

Impostor syndrome is a term used to describe feelings of insecurity or self-doubt, despite there being no evidence to support such a belief.

From BBC • Aug. 5, 2021

Impostor syndrome is something that doesn’t sit with you all the time.

From Slate • May 2, 2021

With those words the Impostor shook them both by the hand, with an air, and left the house; leaving me much more astonished than delighted by the virtues of that same indefinite “it.”

From "Great Expectations" by Charles Dickens

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