A constitutional right is a freedom granted by a government's constitution (on the national or sub-national level), and may not be legally denied by that government.
Examples of provisions made binding upon the states are the 6th Amendment's guarantee of a right to confrontation of witnesses, known as the Confrontation Clause, and the various provisions of the 1st Amendment, guaranteeing the freedoms of speech, the press, religion, and assembly.
For example, the Fifth Amendment protects the right to grand jury proceedings in federal criminal cases. However, because this right was not selectively incorporated into the due process clause of the 14th amendment, it is not binding upon the states. Therefore, persons involved in state criminal proceedings as a defendant have no federal constitutional right to grand jury proceedings. Whether an individual has a right to a grand jury becomes a question of state law.
State constitutions
Each of the United States has its own governing constitution. State constitutions cannot reduce legal protections afforded by the federal charter, but they can provide additional protections. Even where the text of a state constitution matches verbatim that of the federal constitution, the state document may be held to provide more to the citizen. State constitutional rights can also include those entirely unaddressed in the federal constitution, such as the right to adequate education or the right to affordable housing.
Other legal rights in the United States
Not all legal rights of citizens of the United States derive from the United States Constitution. Legal rights of U.S. citizens and U.S. entities also derive from state constitutions
Other nations
Many other democratic nations have followed the US model in enshrining certain rights in their constitutions. Countries whose written constitutions include a bill of rights include Germany, India and Japan.
The United Kingdom, as it has an uncodified constitution, does not have a constitutional bill of rights, although the Human Rights Act 1998 fulfills a similar role.
The European Convention of Human Rights applies in those nations which are members of the Council of Europe. Citizens of these nations can appeal to the European Court of Human Rights where their rights under the convention have been infringed.
In authoritarian nations there are generally few or no guaranteed constitutional rights; alternatively, such rights may exist but be unobserved in practice (as was generally the case in the former Soviet Union).
See also