What is a definition of power that describes the power that the national governments have?

Power, in the context of national governments, refers to the authority and ability to create, enforce, and interpret laws, as well as to regulate the affairs of the state and its citizens. This includes the power to levy taxes, maintain armed forces, conduct foreign policy, and provide public services. National governments derive their power from legal frameworks, constitutions, and the consent of the governed, enabling them to maintain order and ensure the welfare of their populations.