1. A crime that undermines the offender's government
   - high treason, lese majesty 
2. Disloyalty by virtue of subversive behaviour
   - subversiveness, traitorousness 
3. An act of deliberate betrayal
   - treachery, betrayal, perfidy

Derived forms: treasons

See also: treasonist, treasonous

Type of: crime, criminal offence [Brit, Cdn], criminal offense [US], dishonesty, disloyalty, knavery, law-breaking, offence [Brit, Cdn], offense [US]

Encyclopedia: Treason

• defence system
• defence team
• defenceless
• defencelessly
• defencelessness
• defenceman
• defend
• defendable
• defendant
• defender
• Defender of the Faith
• defending
• defending team
• defenestrate
• defenestration
• defense
• Defense Advanced Research Projects Agency
• defense attorney
• defense contractor
• Defense Department
• defense force
• Defense Information Systems Agency
• Defense Intelligence Agency
• defense laboratory
• defense lawyer