In some countries, provinces and states, the highest court is called the supreme court; for example, the United States Supreme Court. In geographical areas with constitutions, the supreme court interprets that area's constitution.
Generally, the higher courts in an area are those generally regarded to create case law with their decisions.
In some states of the United States, the highest court is styled "Supreme Court"; in others, "Court of Appeals."
In Great Britain, there is no court called "Supreme Court." The highest court there is the British House of Lords, which hears appeals from the British Court of Appeals and the British High Court. Rather perversely, the procedures of all courts in England and Wales except the House of Lords are controlled by a statute called The Supreme Court Act (The Court of Appeals can also hear some appeals from the High Court. Below the High Court are the Crown Court, County Courts, Magistrates' Courts and Tribunals. This parenthetical comment should be moved to an appropriate British law page.)
See also United States Supreme Court.