Nationalism (noun)

1. Loyalty and devotion to a nation.
2. An ideology that emphasizes the interests of a particular nation, especially with the aim of gaining and maintaining the nation's sovereignty over its homeland.
3. The belief that the interests of a particular nation-state are of primary importance.

Origin:

French nationalisme, from national national + -iste -ist.

Examples:

1. He felt a strong sense of nationalism pride.
2. The rise of nationalism sentiment led to the formation of new states.
3. The party promotes a nationalist agenda.
4. The nationalism movement sought to unite the country.
5. The leader's speeches were full of nationalist rhetoric.