Key: "S:" = Show Synset (semantic) relations, "W:" = Show Word (lexical) relations
Display options for sense: (gloss) "an example sentence"
Noun
S: (n) metro, tube, underground, subway system, subway (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'"
S: (n) underpass, subway (an underground tunnel or passage enabling pedestrians to cross a road or railway)
S: (n) tunnel (a passageway through or under something, usually underground (especially one for trains or cars)) "the tunnel reduced congestion at that intersection"