tunnel

Definitions of tunnel
  1. noun
    a passageway through or under something, usually underground (especially one for trains or cars)
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    types:
    catacombe
    an underground tunnel with recesses where bodies were buried (as in ancient Rome)
    tunnel de chemin de fer
    a tunnel through which the railroad track runs
    passage souterrain
    an underground tunnel or passage enabling pedestrians to cross a road or railway
    type of:
    passage
    a passage between rooms or between buildings
  2. noun
    an underground tunnel or passage enabling pedestrians to cross a road or railway
    synonyms: passage souterrain
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