The answer to this and your previous post are complex. I would refer you the Social Encyclicals of Leo XIII (Rerum Novarum), Pius XI (Quadragesimo Anno) and John Paul II (Sollicitudo Rei Socialis).. all comprehensively referenced to Scripture.
They are all available at Papal Encyclicals On Line. Not that i expect you to access them.. as i have the distinct impression that you are a troll with little interest in anything except casting sophistry laden barbs of little depth or substance.
The proper definition is the Nation State.. as they exist as a formal Constitutional entity.. including its current borders, governmnet, currency and judicial system.
So it's a poarticular Catholic interpretation?