Definitions

treason

[tree-zuhn] / ˈtri zən /

NOUN

disloyalty

Synonyms

STRONGEST

crime mutiny sedition subversion treachery

STRONG

deceit deceitfulness deception disaffection dishonesty duplicity faithlessness perfidy revolt revolutionary traitorousness

WEAK

breach of faith lèse majesté seditious act seditiousness

Antonyms

STRONG

frankness harmony honesty openness trustworthiness truth truthfulness uprightness

WEAK

allegiance devotion faithfulness fidelity loyalty

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.

For a long time, openly questioning Ronaldo's place in the team almost felt like treason.

From BBC • Jun. 7, 2026

Cambodia's acting head of state, former prime minister Hun Sen, pardoned opposition leader Kem Sokha on Monday from a sentence of almost three decades for treason.

From Barron's • May 25, 2026

Similarly, the earl of Peterborough's son refused both to remove his hat and to enter a plea when tried for treason in 1658.

From Science Daily • May 7, 2026

Copenhagen dismissed and charged Kauffmann with high treason, which he ignored.

From The Wall Street Journal • Apr. 11, 2026

The verdict came swiftly, with the Soviet judge declaring Penkovsky "guilty of treason to the Motherland."

From "Spies: The Secret Showdown Between America and Russia" by Marc Favreau

Vocabulary lists containing treason

"Macbeth" Vocabulary from Act I

Looking to grow your vocabulary? Check out this interactive, curated word list from our team of English language specialists at Vocabulary.com – one of over 17,000 lists we've built to help learners worldwide!

Liberty, Equality, Vocabulary: The French Revolution

Interested in learning more words like this one? Our team at Vocabulary.com has got you covered! You can review flashcards, quiz yourself, practice spelling, and more – and it's all completely free to use!

"The Hunger Games" Vocabulary from Chapter 1

Want to remember this word for good? Start your learning journey today with our library of interactive, themed word lists built by the experts at Vocabulary.com – we'll help you make the most of your study time!