treasonnoun [ U ]
uk/ˈtriː.zən/us/ˈtriː.zən/(the crime of) showing no loyalty to your country, especially by helping its enemies or trying to defeat its government:
In 1606 Guy Fawkes was executed for treason.
Thesaurus: synonyms and related words
Disloyalty, betrayal & treason
- adultery
- backstabber
- betray
- betrayal
- break ranks idiom
- collaborate
- deserter
- desertion
- double-cross
- faithless
- false
- fifth column
- high treason
- sell sb down the river idiom
- sellout
- stab
- stab sb in the back idiom
- traitor
- treacherous
- treachery
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You can also find related words, phrases, and synonyms in the topics:
Terrorism & political crime