subway

/ˈsʌbweɪ/
noun
  1. An underground electric railroad system in a city, used for public transportation.
    • She bought a monthly pass for the subway.
    • The subway was crowded during rush hour.
    • We took the subway to get downtown faster.
  2. A passage or tunnel under a road or street for pedestrians to cross safely.
    • Children are taught to use the subway instead of jaywalking.
    • The subway under the main street is lit with bright lights.
    • Use the subway to cross the busy highway.
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