Dictionary.com
Thesaurus.com
Synonyms

traitor

American  
[tray-ter] / ˈtreɪ tər /

noun

  • traitors
    plural
  1. a person who betrays another person, a cause, or any trust.

  2. a person who commits treason by betraying their country.


traitor British  
/ ˈtreɪtə /

noun

  1. a person who is guilty of treason or treachery, in betraying friends, country, a cause or trust, etc

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Derived Forms

Inflected Forms

Nouns


Etymology

Origin of traitor

First recorded in 1175–1225; Middle English from Old French from Latin trāditōr-, stem of trāditor “betrayer”; see traditor


Explanation

A traitor says one thing but does another. If you promise a friend you'll keep his secret, but instead you blab it to everyone, you're a traitor. The word origin says it all: traditorem is the Latin word for "betrayer." Liar? Yes. Backstabber? Yes. True friend? Heavens, no. Traitors betray the trust of those who have faith in them or believe their promises. Traitor also applies to a person who betrays his country by committing treason: turning against his own government, perhaps by selling secret information.

Keep Reading on Vocabulary.com

Vocabulary lists containing traitor

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

"He's the opposite of me. So relaxed. He's a natural born traitor."

From BBC ● Oct. 17, 2026

Asked about being called a traitor and worse, he told reporters, “I am the mayor of New York City, and this is what I signed up for.”

From Slate ● Oct. 15, 2026

"I did not choose the traitor life, the traitor life chose me," said the latest recruit to the dark side.

From BBC ● Oct. 9, 2026

As for Acaster, he's admitted the other comedians are his “biggest threat” when it comes to being detected as a traitor.

From BBC ● Oct. 4, 2026

It is hard, I found, to be called traitor.

From "The Left Hand of Darkness" by Ursula K. Le Guin

After Thursday saw King Kenny recruited by the traitors - that episode ending with his deliciously evil laugh - the YouTuber and former aspiring boxer brought fresh and fiendish energy to the turret.

From BBC ● Oct. 17, 2026

The uproar over “NAZA” has also led the filmmakers to be called traitors in their country.

From Los Angeles Times ● Oct. 9, 2026

The traitors agreed to stay out of the game themselves, before settling on Kemp, Ranganathan, his comic pal Rob Beckett and Little Mix and solo singer Leigh-Anne Pinnock.

From BBC ● Oct. 9, 2026

The remaining traitors, Maya Jama and James Acaster, met in the turret later with the choice of murdering previously shortlisted players Jerry Hall and Hannah Fry, or seducing a third traitor to replace Grant.

From BBC ● Oct. 8, 2026

I tried one last time to wrench myself away, but my knees, the traitors, buckled under me.

From "The Darkest Minds" by Alexandra Bracken

Random Word

Spin the wheel and learn a new word!

Get a word


Vocabulary.com logo
by dictionary.com

Look it up. Learn it forever.

Remember new words for good with VocabTrainer. Expand your vocabulary effortlessly with personalized learning tools that adapt to your goals.

Take me to Vocabulary.com