Metropolis (noun)

A large city, especially one that is the chief city of a country, state, or region.

Origin:

From latin metropolis, from greek μητρόπολις (mētropolis) "mother city", from μήτηρ (mētēr) "mother" + πόλις (polis) "city".

Examples:

1. New York City is a metropolis with a population of over 8 million people.
2. London is considered as the economic metropolis of the United Kingdom.
3. The city is a bustling metropolis of commerce and culture.
4. The metropolis is the center of political, economic, and cultural power.
5. The city is a major metropolis and a center of transportation, industry and technology.