metro
NounWordNet 3.0
Noun (1)
- an electric railway operating below the surface of the ground (usually in a city)“in Paris the subway system is called the `metro' and in London it is called the `tube' or the `underground'”Synonyms: tubeundergroundsubway systemsubway
Webster's Dictionary (GCIDE)
Subway \Sub"way`\, n.
1.An underground way or gallery; especially, a passage under a street, in which water mains, gas mains, telegraph wires, etc., are conducted. [1913 Webster]
2.An underground railroad, usually having trains powered by electricity provided by an electric line running through the underground tunnel. It is usually confined to the center portion of cities; -- called also tube, and in Britain, underground. In certain other countries (as in France or Russia) it is called the metro. [PJC]