/ Dictionary / Index M megalopolis: Meaning and Definition of Find definitions for: meg•a•lop•o•lis Pronunciation: (meg"u-lop'u-lis), [key] — n. a very large city. an urban region, esp. one consisting of several large cities and suburbs that adjoin each other. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: megalopolis (Thesaurus) megalomaniac megalopolitan Related Content Daily Word Quiz: pudgy Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language