as in treachery
the act or fact of violating the trust or confidence of another
reading a friend's diary without permission would have to be regarded as the ultimate act of personal treason
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Recent Examples of treason
Saudi Arabi accused the UAE of supporting the separatists, and smuggling the STC leader, Aidarous al-Zubaidi, who is wanted for treason, out of Yemen and flying him to Abu Dhabi.
—
Arkansas Online, 8 Feb. 2026
Elsewhere, will Canada put Tate McRae on trial for treason?
—The Editors, Vulture, 5 Feb. 2026
In April 2023, a Russian court sentenced prominent opposition figure and journalist Vladimir Kara-Murza to 25 years in a high-security prison on charges of treason for criticizing Russia's war in Ukraine.
—CBS News, 4 Feb. 2026
Currently, the Indiana constitution requires all defendants to be offered bail unless they are charged with murder or treason, Koch said.
—Alexandra Kukulka, Chicago Tribune, 26 Jan. 2026
See All Example Sentences for treason
Arkansas Online, 8 Feb. 2026
Elsewhere, will Canada put Tate McRae on trial for treason?
—The Editors, Vulture, 5 Feb. 2026
In April 2023, a Russian court sentenced prominent opposition figure and journalist Vladimir Kara-Murza to 25 years in a high-security prison on charges of treason for criticizing Russia's war in Ukraine.
—CBS News, 4 Feb. 2026
Currently, the Indiana constitution requires all defendants to be offered bail unless they are charged with murder or treason, Koch said.
—Alexandra Kukulka, Chicago Tribune, 26 Jan. 2026
See All Example Sentences for treason
Recent Examples of Synonyms for treason
Noun
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Perfidy — from the French perfidie via the Latin perfidia — means deceitfulness, treachery or a breach of faith or promise.—
Harmeet Kaur,
CNN Money,
21 Jan. 2026
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But despite all this, not every Chelsea fan outside his family will regard this transfer as treachery.—
Simon Johnson,
New York Times,
17 Jan. 2026
Noun
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It’s filled with super-heightened emotions; unrestrained passion, betrayal, evil and even a magic spell or two.—
David Lyman,
Cincinnati Enquirer,
5 Feb. 2026
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What’s most striking about the response is the sense of betrayal about Aronofsky’s involvement.—
Jake Kanter,
Deadline,
5 Feb. 2026
Cite this Entry
“Treason.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/treason. Accessed 18 Feb. 2026.
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