treason
(noun)
noun
1. a crime that undermines the offender's government
Definition categories: act, crime
2. disloyalty by virtue of subversive behavior
Similar word(s): subversiveness, traitorousness
Definition categories: attribute, disloyalty
3. an act of deliberate betrayal
Similar word(s): betrayal, perfidy, treachery
Definition categories: act, dishonesty, knavery