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
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
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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And so every regime invests in having student informers.—
Anne Applebaum,
The Atlantic,
23 Jan. 2026
-
The whole family is deeply involved in the revolutionary movement: the oldest son disappears into Siberia, never to be seen or heard of again, while the youngest, eighteen, is jailed together with his father, and executed after his cell is exposed by an informer.—
Literary Hub,
Literary Hub,
22 Jan. 2026
Noun
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As a result, he was tried in absentia, declared a traitor and subjected to the state’s harshest penalties.—
Kimberly Nath,
The Conversation,
7 May 2026
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Linking their destinities is a man—presumably the traitor’s son of the title—with the extra wrinkle that Elegy is fated to fall in love with him.—
Literary Hub,
Literary Hub,
1 May 2026
Noun
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The lawsuit also alleges authorities relied on testimony from a jailhouse informant who received benefits in exchange for cooperating, while failing to disclose information that could have undermined his credibility.—
Stepheny Price,
FOXNews.com,
7 May 2026
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The Justice Department accuses the group of fraud in connection with its payments to informants.—
Ella Lee,
The Hill,
6 May 2026
Noun
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After Spirit Airlines ceased operations, in the middle of the night on May 2nd, a series of canary-yellow airplanes sat on the tarmac at Newark Airport, arranged neatly like children’s toys at day’s end.—
Doreen St. Félix,
New Yorker,
9 May 2026
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These living materials could also serve as canaries in the coal mine for water safety, glowing brighter or dimming in the presence of specific toxins.—
Mrigakshi Dixit,
Interesting Engineering,
7 May 2026
Noun
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The strain involved in the cruise ship outbreak, the Andes strain, is not found in North America and is linked to the pygmy rice rat that’s native in parts of Argentina and Chile.—
Aria Bendix,
NBC news,
12 May 2026
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The residents sheltering in place during the pandemic hit more deer, left more trash that fed more rats, all of which sustained a bigger pack of coyotes over the past year.—
Literary Hub,
Literary Hub,
12 May 2026
Cite this Entry
“Betrayer.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/betrayer. Accessed 14 May. 2026.
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