'Megalopolis' definitions:

Definition of 'megalopolis'

(from WordNet)
noun
A very large urban complex (usually involving several cities and towns)

Definition of 'Megalopolis'

From: GCIDE
  • Megalopolis \Meg`a*lop"o*lis\, Megapolis \Meg`a"po*lis\(m[e^]g`[.a]*l[o^]p"[-o]*l[i^]s), n. [NL., fr. Gr. megalo`polis; me`gas, mega`lh, great + po`lis city.]
  • 1. A chief city; a very large cuity; a metropolis. [1913 Webster]
  • 2. A region in which the suburbs of several large cities merge to form one large predominantly urbanized area. [PJC]