megalopolis
noun/ˌmeɡəˈlɒpəlɪs/
/ˌmeɡəˈlɑːpəlɪs/
(formal)- a very large city or group of cities where a great number of people liveWord Originmid 19th cent.: from megalo- ‘great’ + Greek polis ‘city’.
Check pronunciation:
megalopolis