the chief, and sometimes capital, city of a country, state, or region.
3.
a central or principal place, as of some activity: the music metropolis of France.
4.
the mother city or parent state of a colony, especially of an ancient Greek colony.
5.
the chief see of an ecclesiastical province.
Origin: 1350–1400; Middle English < Late Latin mētropolis < Greek mētrópolis a mother state or city, equivalent to mētro-, combining form of mḗtērmother + pólis-polis, polis