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Definitions

traitor

[trey-ter] / ˈtreɪ tər /
NOUN
person who is disloyal
Synonyms
STRONGEST
conspirator deserter hypocrite impostor informer renegade spy turncoat
STRONG
Judas apostate backslider betrayer deceiver defector double-crosser fink intriguer miscreant quisling rebel snake sneak snitch snitcher squealer tattletale traducer treasonist two-timer whistle-blower wolf
WEAK
Benedict Arnold back-stabber stool pigeon
Antonyms
WEAK
loyalist

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.

And, in killing Capt. Mayer, he underscored the idea that the traitor was inside the army—a concept that obviously was key in the Dreyfus affair.

From Slate • Mar. 2, 2026

Some have already visited her in County Down including her fellow winning traitor.

From BBC • Feb. 26, 2026

"But if he is a traitor, he doesn't deserve it," Walesa added, arguing that for the moment, "it's too early to judge".

From Barron's • Feb. 23, 2026

“I think it’s time that we abandon this disrespectful word malinchista to refer to someone as a traitor to Mexico,” said Roberto Pineda, 61, a cafe owner who enjoyed the spectacle.

From Los Angeles Times • Jan. 25, 2026

Please don’t let Maria really be a traitor...

From "Amari and the Night Brothers" by B.B. Alston

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.