adjective / noun
metropolitan
met-ruh-PAH-lih-tun/ˌmetrəˈpɑːlɪtən/
Of a major city and its surrounding district.
Commuter trains connect the city center with suburbs throughout the metropolitan area.

Etymology
The base names a city resident; the ending makes it mean belonging to or connected with a city. The chief-city connection carries into the modern sense of a large urban center and its surrounding area.
In context
a megalopolis is defined as a very large densely populated group of connected metropolitan areas
More examples
- Housing costs vary widely across the metropolitan region.
- The metropolitan population includes residents of nearby suburbs.
- Many metropolitans rely on public transit rather than cars.
Forms
metropolitan · metropolitans
metropolis noun — A large, important city in a region.
Similar words
- urban
- Describes the city itself, not necessarily its surrounding suburbs.
- citywide
- Covers an entire city but excludes its surrounding district.