Definition of megalopolis noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˌmeɡəˈlɒpəlɪs//
; NAmE NAmE//ˌmeɡəˈlɑːpəlɪs//
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a very large city or group of cities where a great number of people live Word Origin mid 19th cent.: from megalo- ‘great’ + Greek polis ‘city’.
See the Oxford Advanced American Dictionary entry: megalopolis