1
: one who betrays another's trust or is false to an obligation or duty
2
: one who commits treason
Examples of traitor in a Sentence
She has been called a traitor to the liberal party's cause.
He was a traitor who betrayed his country by selling military secrets to the enemy.
Recent Examples on the Web
These mercenary-force ICE clowns are traitors to the country and the Constitution.
—
Sun Sentinel Editorial Board, Sun Sentinel, 12 Jan. 2026
But the secret traitor leaves us all faithfully stabbing in the dark, trying to Sherlock their secret identity, figure out their moves without their confessional tapes.
—Raven Smith, Vogue, 9 Jan. 2026
And then at night a mischievous traitor that will be murdering people.
—Lisa Gutierrez, Kansas City Star, 9 Jan. 2026
Twenty-three stars will try to deduce who the traitors are among them.
—Brendan Le, PEOPLE, 9 Jan. 2026
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Cite this Entry
“Traitor.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/traitor. Accessed 20 Jan. 2026.
Kids Definition
traitor
noun
trai·tor
ˈtrāt-ər 
1
: one who betrays another's trust or is false to an obligation or duty
2
: one who commits treason
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