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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.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Human Geography) an urban complex, usually comprising several large towns
[C20: megalo- + Greek polis city]
megalopolitan adj, n
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
a densely populated area of continuous extent containing many cities and towns that are separate administrative units.See also: Cities
-Ologies & -Isms. Copyright 2008 The Gale Group, Inc. All rights reserved.