Constitution of the United States of America, the fundamental law of the U.S. federal system of government and a landmark document of the Western world. The oldest written national constitution in use, the Constitution defines the principal organs of government and their jurisdictions and the basic rights of citizens. Constitutional Convention.
verb (used with object), urbanized, urbanizing. 1. to make or cause to become urban, as a locality. Also, especially British, urbanise.
The definition of urbane is  someone polished, suave or sophisticated. An example of someone who would be described as urbane is someone sophisticated and refined.