megalopolis

/ˌmɛɡəˈlɒpəlɪs/
noun
  1. A very large, densely populated city or urban area, often formed by several cities growing together.
    • Tokyo is a megalopolis with over 37 million people living in its metropolitan area.
    • The northeastern United States is home to a megalopolis stretching from Boston to Washington, D.C.
    • Living in a megalopolis means dealing with heavy traffic but also having access to countless cultural events.
Antonyms
What does "megalopolis" mean? | whatsthatwordmean | whatsthatwordmean