Subway System — synonyms, definition

1. subway system (Noun) N. Amer

4 synonyms
metro subway tube underground
1 definition

subway system (Noun) — An electric railway operating below the surface of the ground (usually in a city). ex. "in Paris the subway system is called the 'metro' and in London it is called the 'tube' or the 'underground'"

6 types of
rail railroad railroad line railway railway line railway system