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1. A very large city.
2. A region made up of several large cities and their surrounding areas in sufficient proximity to be considered a single urban complex.
meg′a·lo·pol′i·tan (-lō-pŏl′ĭ-tən) adj.
(Human Geography) an urban complex, usually comprising several large towns
[C20: megalo- + Greek polis city]
megalopolitan adj, n
meg•a•lop•o•lis(ˌmɛg əˈlɒp ə lɪs)
1. a very large city.
2. an urban region, esp. of large adjoining cities and suburbs.
a densely populated area of continuous extent containing many cities and towns that are separate administrative units.See also: Cities