megalopolis(n = noun.location) - a very large urban complex (usually involving several cities and towns);
is a kind of populated area, urban area
A chief city; a metropolis. [1913 Webster]
megalopolis, n.
1 a great city or its way of life.
2 an urban complex consisting of a city and its environs.
Derivative:
megalopolitan adj. & n.
Etymology:
MEGA- + Gk polis city