subway
noun
- an underground way or passage
- Chiefly Brit. an underpass for pedestrians
- ☆ an underground, metropolitan electric railway or the tunnel through which it runs
See subway in American Heritage Dictionary 4
sub·way
nouna. An underground urban railroad, usually operated by electricity.
b. A passage for such a railroad.
- An underground tunnel or passage, as for a water main or for pedestrians.
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