ಅರ್ಥ : An electric railway operating below the surface of the ground (usually in a city).
ಉದಾಹರಣೆ :
In Paris the subway system is called the `metro' and in London it is called the `tube' or the `underground'.
ಸಮಾನಾರ್ಥಕ : metro, subway system, tube, underground
ಅರ್ಥ : An underground tunnel or passage enabling pedestrians to cross a road or railway.
ಸಮಾನಾರ್ಥಕ : underpass