megalopolis
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/ˌmeɡəˈlɑːpəlɪs/
🇬🇧
/ˌmeɡəˈlɒpəlɪs/
A very large urban area made up of many cities that are close together.
The megalopolis along the East Coast of the United States is home to millions of people.
美国东海岸的大都市区是数百万人的家园。