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English definition of “subway”

subway

noun [C] (RAILWAY)    /ˈsʌb.weɪ/ mainly US
A1 a railway system in which electric trains travel along passages below ground: We took the subway uptown to Yankee Stadium.Railways and railway lines
(Definition of subway noun (RAILWAY) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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