Nation

Nation= a politically organized body of people under a single, usually independent government; a country: ‘The entire nation is celebrating the victory.’

A person comes from, lives in, or feels part of a particular country (NOT nation): ‘Some people in this country think that the leadership is too weak.’ ‘People living in former Soviet bloc countries are undergoing a difficult period of transition.’

Nation is less common than country and is mainly used when a country is considered as a political or economic structure: ‘Japan has become the richest nation in the world.’

Nationality = the status of belonging to a particular nation by birth or naturalization: ‘Immigrants of the same nationality often seek each other out.’ The usual way of referring to someone’s nationality is to use come from: ‘Most of the students in my class come from Oman or Bahrain.’

Nationality is used mainly in formal styles: ‘Visitors of Swedish nationality do not require a visa.’ ‘Despite being born in Germany, these children do not have an automatic right to German nationality.’