Constitutional change refers to the process of altering or amending a country's constitution, which is the fundamental legal document outlining the structure of government and the rights of citizens. This change can occur through various methods, including legislative action, popular referendums, or judicial interpretation. In many countries, such as the United States, amendments require a supermajority vote in the legislature or approval by a significant portion of the states. This ensures that changes reflect a broad consensus among the population, maintaining the stability and integrity of the constitutional framework.