National sovereignty refers to the authority and power held by an independent nation-state over its own affairs without interference from external forces. It encompasses a nation's ability to govern itself politically, economically, socially, and culturally.
Related terms
Nation-state: A political entity consisting of a sovereign state inhabited primarily by people who share common cultural backgrounds or ethnicities.
Self-determination: The right of people within a particular territory to determine their own political status and form their own government according to their will.
Supranational organization: An international organization formed by multiple nations that share decision-making authority over certain issues affecting member states.