What is the meaning of Metropolis?

The mother (founding) polis (city state) of a colony.

A large, busy city, especially as the main city in an area or country or as distinguished from surrounding rural areas.

The see of a metropolitan bishop, ranking above its suffragan diocesan bishops.

A generic focus in the distribution of plants or animals.

metropolis

metropolis

plural of metropol

A metropolis

Source: wiktionary.org