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Synonyms

impostor

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

noun

  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

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.

She says one man felt embarrassed after exchanging more than 20 emails with an impostor.

From The Wall Street Journal • Apr. 16, 2026

I stayed silent in that group for days, convinced someone would realize I was an impostor.

From Slate • Apr. 12, 2026

“That little flicker—it can plant itself in you and blossom into self-doubt, impostor syndrome,” she says.

From The Wall Street Journal • Apr. 5, 2026

With every impostor removed from your life, more space is created for your person to move in.

From Los Angeles Times • Feb. 13, 2026

His face was as mild and hopeless as ever; mooning above the snappy, rigid blouse, it gave him the air of an impostor.

From "A Separate Peace" by John Knowles