1. The political principle or movement advocating the separation of a group, region, or territory from a larger political entity or nation-state.
The secessionism movement in Catalonia has gained significant political support in recent years.
O movimento separatista na Catalunha ganhou apoio político significativo nos últimos anos.
2. The ideology or doctrine that supports the right of regions or groups to withdraw from a political union.
Historical secessionism has shaped many modern nations through civil conflicts and independence movements.
O separatismo histórico moldou muitas nações modernas através de conflitos civis e movimentos de independência.