A "Rigid Constitution" refers to a type of constitution that is difficult to amend or change. This means that any alterations require a complex process, often involving supermajority votes or approval from multiple governing bodies. The intention behind a rigid constitution is to maintain stability and protect fundamental rights by making it challenging to alter the core principles of governance. Countries like the United States have rigid constitutions, where amendments must be ratified by two-thirds of both houses of Congress and three-fourths of the states. This contrasts with a "Flexible Constitution," which can be changed more easily through ordinary legislative processes.