Metropolis

New York has garnered the nickname Metropolis to describe the city in the daytime in popular culture, contrasting with Gotham, sometimes used to describe New York at night.
Skyline of London, which was once the metropole of the British Empire
Skyline of Jakarta, the world's most populous metropolis

A metropolis is a large city or conurbation which is a significant economic, political, and cultural area for a country or region, and an important hub for regional or international connections, commerce, and communications.

A big city belonging to a larger urban agglomeration, but which is not the core of that agglomeration, is not generally considered a metropolis but a part of it. The plural of the word is metropolises, although the Latin plural is metropoles, from the Greek metropoleis (μητρoπόλεις).

For urban areas outside metropolitan areas that generate a similar attraction on a smaller scale for their region, the concept of the regiopolis ("regio" for short) was introduced by urban and regional planning researchers in Germany in 2006.