"A nation state is a state in which a great majority shares the same culture and is conscious of it. The nation state is an ideal ...
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in which cultural boundaries match up with political ones. According to one definition, "a nation state is a sovereign state of which most of its subjects are united also by factors which defined a nation such as language or common descent." It is a more precise concept than "country", since a country does not need to have a predominant ethnic group.
A nation, in the sense of a common ethnicity, may include a diaspora or refugees who live outside the nation-state; some nations of this sense do not have a state where that ethnicity predominates. In a more general sense, a nation-state is simply a large, politically sovereign country or administrative territory. A nation-state may be contrasted with:" - (en.wikipedia.org 29.02.2020)