Constitutional (adjective)

1. Relating to or of the nature of a constitution.
2. Relating to the fundamental principles according to which a nation, state, or organization is governed.
3. Relating to the physical makeup or structure of an organism.

Origin:

Late 16th century: from latin constitutionalis, from constitu(t)io(n-) "constitution" (see constitution).

Examples:

1. The president's action is unconstitutional.
2. The bill violates the constitutional rights of citizens.
3. The company's constitutional documents.
4. The constitutional reforms.
5. He had a constitutional disorder.