Give definition of nationalism?

Nationalism is a political ideology and movement that emphasizes the interests, rights, and cultural identity of a particular nation or group of people. It promotes the idea that the nation is the central organizing principle of society and that loyalty and devotion to one's nation should be prioritized above other social, political, or economic affiliations. Nationalism often involves a sense of pride and attachment to one's nation, as well as a desire for self-determination and independence. It can manifest in various forms, ranging from peaceful cultural preservation to more extreme and exclusionary ideologies.