Ais a group of "people with a shared identity and culture (a nation) who possess their own territory and state government, or a state-level political system that contains all and only members of one nation."

A nation-state is a group of "people with a shared identity and culture (a nation) who possess their own territory and state government, or a state-level political system that contains all and only members of one nation."
It is a form of political organization with one great majority. The two word nation and state describe the following: a state is apolitical and geopolitical entity, while a nation is a cultural and ethnic one.