A more thorough explanation:

metropolitan, adj. Refers to something related to a city or metropolis.

metropolitan, n. In Ecclesiastical law, it refers to an archbishop or the head of a province. For example, the Archbishop of Canterbury is a metropolitan.

Example 1: The New York City metropolitan area includes the five boroughs and surrounding counties.

Example 2: The Metropolitan Museum of Art in New York City is one of the largest and most famous art museums in the world.

Example 3: The Archbishop of Paris is the metropolitan of the province of Paris in France.

These examples illustrate how the term "metropolitan" is used to describe something related to a city or metropolis, such as a geographic area or cultural institution. The Ecclesiastical law example shows how "metropolitan" can also refer to a specific position of authority within a religious hierarchy.