English noun: subway system | |||
1. | subway system (artifact) an electric railway operating below the surface of the ground (usually in a city) | ||
Samples | In Paris the subway system is called the `metro' and in London it is called the `tube' or the `underground'. | ||
Synonyms | metro, subway, tube, underground | ||
Broader (hypernym) | railroad, railroad line, railway, railway line, railway system | ||