A "metropoleis" refers to a large city that serves as a central hub for economic, cultural, and political activities. These urban areas often have significant influence over surrounding regions and can be characterized by high population density, diverse communities, and extensive infrastructure. Examples of metropoleis include cities like New York, Tokyo, and London. Metropoleis typically offer a wide range of services, including education, healthcare, and entertainment, attracting people from various backgrounds. They often play a crucial role in global trade and finance, making them vital to both national and international economies.