noun
a large city or urban area that has a high population density and extensive public transportation systems
adjective
describing a city that is large, urban, and has a high population density
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The metro city is known for its efficient public transportation system.
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I love visiting the metro city for all the shopping and dining options.
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The metro city is where all the cool kids hang out.
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Living in a metro city can feel like being at the center of the universe.