"Supranationalism" in international politics refers to a political system where authority is shared between multiple nations, often through institutions that transcend national borders. This allows for collective decision-making and governance on issues such as trade, environment, and security. The European Union is a prominent example, as it enables member states to collaborate on policies that affect them collectively while maintaining some degree of sovereignty. Supranational identities can shape national interests and foster closer ties among nations, posing unique challenges and opportunities within global governance.