1
as in informer
a person who provides information about another's wrongdoing
the arrested drug dealer vowed that he would get his revenge on his betrayer
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2
as in traitor
one who betrays a trust or an allegiance
the betrayer of Anne Frank's family in Amsterdam has never been identified for certain
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Example Sentences
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Recent Examples of betrayer
Then go ahead and depict the country’s prime minister as the betrayer of Christ.
—
David Frum,
The Atlantic,
21 May 2026
Lesch plays the savior’s anguished betrayer not as an intellectual equal who fiercely debates him and loses all patience with the movement.
—
Christopher Arnott,
Hartford Courant,
3 May 2026
Judas, the betrayer of Jesus Christ, was believed to be the 13th Apostle to join the table at the Last Supper.
—
Chad Murphy,
Cincinnati Enquirer,
13 Feb. 2026
David Frum,
The Atlantic,
21 May 2026
Lesch plays the savior’s anguished betrayer not as an intellectual equal who fiercely debates him and loses all patience with the movement.
—
Christopher Arnott,
Hartford Courant,
3 May 2026
Judas, the betrayer of Jesus Christ, was believed to be the 13th Apostle to join the table at the Last Supper.
—
Chad Murphy,
Cincinnati Enquirer,
13 Feb. 2026
Recent Examples of Synonyms for betrayer
Noun
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One of State Security’s main goals, as well as a central source of its strength, is turning civilians into informers.
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And so every regime invests in having student informers.
Noun
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Harper suspects Bichette, after seven seasons in Toronto, won’t be treated as a traitor.
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In other words, had become a traitor.
Noun
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The devices were hidden in a pack of cigarettes, the informant’s watch, and a cellphone.
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However, some members of the Hole in the Wall Gang got busted in 1981 for stealing from a home furnishings store, and Cullotta — one of those busted — became an informant.
Noun
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The Edge and Adam Clayton both release canaries into the air in slow motion.
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Matt Schmidt, founder of Schmidt Automotive Research, said BMW is a canary in a coal mine for the industry.
Noun
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There are obvious similarities to Brad Marchand here, with rat king energy and two-way skill, but his shutdown play could put him on the Seth Jarvis track, too.
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Retrofitted rat traps that fired Hollywood blanks meant to deafen and deter.
Cite this Entry
“Betrayer.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/betrayer. Accessed 1 Jul. 2026.
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