The difference between Metro and Underground railway
When used as nouns, metro means an underground railway, whereas underground railway means a subway system for the movement of trollies or trains.
Metro is also adjective with the meaning: metropolitan.
check bellow for the other definitions of Metro and Underground railway
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Metro as a noun:
An underground railway.
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Metro as a noun:
A train that runs on such an underground railway.
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Metro as a noun:
An urban rapid transit light railway
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Metro as a noun:
A train that runs on such a railway.
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Metro as a noun:
a metropolitan area
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Metro as an adjective:
metropolitan
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Underground railway as a noun (rail):
A subway system for the movement of trollies or trains.