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: metro, subway system, tube, underground.

Roget 266: travel; traveling etc. v.. wayfaring, campaigning.    journey, excursion, expedition, tour, trip, grand tour, circuit, peregrination, discursion^†, ramble, pilgrimage, hajj, trek, course, ambulation^†, march, walk, promenade, constitutional, stroll, saunter, tramp, jog trot, turn, stalk, perambulation; noctambulation^†, noctambulism; somnambulism; outing, ride, drive, airing, jaunt.    equitation, horsemanship, riding, manege [Fr.], ride and tie; basophobia^†.    roving, vagrancy, pererration^†; marching and countermarching; nomadism; vagabondism, vagabondage; hoboism [U.S.]; gadding; flit, flitting, migration; emigration, immigration, demigration^†, intermigration^†; wanderlust.    plan, itinerary, guide; handbook, guidebook, road book; Baedeker^†, Bradshaw, Murray; map, road map, transportation guide, subway map.    procession, cavalcade, caravan, file, cortege, column.    [Organs and instruments of locomotion] vehicle etc. 272; automobile, train, bus, airplane, plane, autobus, omnibus, subway, motorbike, dirt bike, off-road vehicle, van, minivan, motor scooter, trolley, locomotive; legs, feet, pegs, pins, trotters.    traveler etc. 268.    depot [U.S.], railway station, station.    ... show more

Dutch: metrostel, metro, ondergrondse
Polish: metro

An underground tunnel or passage enabling pedestrians to cross a road or railway.

synonym: underpass.

Dutch: onderdoorgang, metro, verkeerstunnel, voetgangerstunnel
Polish: przejście podziemne