megalopolis Meaning, Definition & Usage

  1. noun a very large urban complex (usually involving several cities and towns)

WordNet

Meg`a*lop"o*lis noun
Etymology
NL., fr. Gr. megalo`polis; me`gas, mega`lh, great + po`lis city.
Definitions
  1. A chief city; a metropolis. R.

Webster 1913