Unlike the British, the United States constitution is

Unlike the British constitution, the United States constitution is rigid, federal, and written. A rigid constitution is one that is difficult to amend or change, and the United States constitution requires a lengthy and deliberate process to make any amendments. The constitution is also federal, meaning that power is divided between the national government and the state governments. Finally, the United States constitution is a written document, which means that its provisions are codified in a single document that can be referred to and interpreted with relative ease. This is in contrast to the British constitution, which is largely unwritten and based on a collection of laws, conventions, and traditions that have evolved over time.