A crime that undermines the offender's government.

synonyms: high treason, lese majesty.

Roget 742: disobedience, insubordination, contumacy; infraction, infringement; violation, noncompliance; nonobservance etc. 773.    revolt, rebellion, mutiny, outbreak, rising, uprising, insurrection, emeute [Fr.]; riot, tumult etc. (disorder) 59; strike etc. (resistance) 719; barring out; defiance etc. 715.    mutinousness etc. adj.; mutineering^†; sedition, treason; high treason, petty treason, misprision of treason; premunire [Lat.]; lese majeste [Fr.]; violation of law etc. 964; defection, secession.    insurgent, mutineer, rebel, revolter, revolutionary, rioter, traitor, quisling, carbonaro^†, sansculottes [Fr.], red republican, bonnet rouge, communist, Fenian, frondeur; seceder, secessionist, runagate, renegade, brawler, anarchist, demagogue; Spartacus, Masaniello, Wat Tyler, Jack Cade; ringleader.    ... show more

Dutch: crimen laesae majestatis, hoogverraad, landverraad, majesteitsschennis
Polish: zdrada stanu

Disloyalty by virtue of subversive behavior.

synonyms: subversiveness, traitorousness.

Polish: wywrotność

An act of deliberate betrayal.

synonyms: betrayal, perfidy, treachery.

Roget 940: improbity^†; dishonesty, dishonor; deviation from rectitude; disgrace etc. (disrepute) 874; fraud etc. (deception) 545; lying etc. 544; bad faith, Punic faith; mala fides [Lat.], Punica fides [Lat.]; infidelity; faithlessness etc. adj.; Judas kiss, betrayal.    breach of promise, breach of trust, breach of faith; prodition^†, disloyalty, treason, high treason; apostasy etc. (tergiversation) 607; nonobservance etc. 773.    shabbiness etc. adj.; villainy, villany^†; baseness etc. adj.; abjection, debasement, turpitude, moral turpitude, laxity, trimming, shuffling.    perfidy; perfidiousness etc. adj.; treachery, double dealing; unfairness etc. adj.; knavery, roguery, rascality, foul play; jobbing, jobbery; graft, bribery; venality, nepotism; corruption, job, shuffle, fishy transaction; barratry, sharp practice, heads I win tails you lose; mouth honor etc. (flattery) 933.    ... show more

Polish: sprzeniewierzenie, zdrada, niewierność