A constitutional amendment is a change or addition made to a country's constitution. It is a formal process that involves revising the existing text of the constitution, usually through the approval of legislative bodies and, in some cases, direct voter approval. Amending a constitution can be done for various reasons such as addressing issues with the current system or reflecting changes in society's values and beliefs. The process of amendment varies from country to country but typically requires a significant amount of time and effort to achieve.