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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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.—
Abraham Jiménez Enoa,
The Dial,
19 May 2026
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And so every regime invests in having student informers.—
Anne Applebaum,
The Atlantic,
23 Jan. 2026
Noun
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Queen Seymour is on the run as a traitor, having literally sunk one palace, while Queen Howard practices spycraft right under her husband’s nose.—
Literary Hub,
Literary Hub,
1 June 2026
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Lack of support compounded 'traitor' narrative, Greene says Greene was one of the president's earliest and loudest supporters during his first term, and worked relentlessly on his reelection campaign in 2024, appearing with the president at multiple events.—
Irene Wright,
USA Today,
29 May 2026
Noun
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Greylord was a watershed moment in its use of eavesdropping devices and a mole to obtain evidence instead of relying on wrongdoers to become government informants.—
Kori Rumore,
Chicago Tribune,
6 June 2026
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The charges do not stem from the general practice of paying informants but from the Justice Department's allegations that the SPLC made these payments without disclosing the practice to donors and by defrauding banks.—
Sarah N. Lynch,
CBS News,
3 June 2026
Noun
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By releasing changes incrementally (canary or feature flags) and tying them to real-time health metrics, teams can detect issues early and revert automatically.—
Expert Panel®,
Forbes.com,
26 May 2026
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A little different from the regular radiant thanks to its rich canary tone, this three-stone jewelry piece absolutely makes a statement.—
Shelby Wax,
Vogue,
22 May 2026
Noun
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Sikiric remembers the juice sometimes harbored rats that had been caught and eaten by the pigs in their final hours.—
Sara Talpos — Undark,
STAT,
1 June 2026
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Someone says the rats are actually cute — what’s your honest response?—
Zach Schiffman,
Curbed,
29 May 2026
Cite this Entry
“Betrayer.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/betrayer. Accessed 8 Jun. 2026.
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