A tunnel is a passage that runs underground or through something, like a train tunnel that cuts through a mountain. Some theme parks have networks of underground tunnels so that employees can move around out of sight of visitors.

Some tunnels, like New York's Lincoln Tunnel and the Holland Tunnel, which connect New York City to New Jersey, are large and solid enough to drive cars through. Others are much smaller, like the tunnels small animals dig through snow or soil for safety and shelter. As a verb, tunnel means "dig a tunnel" or "force through," the way your neighborhood groundhog tunnels under your dad's vegetable garden.

Definitions of tunnel
  1. noun
    a passageway through or under something, usually underground (especially one for trains or cars)
    “the tunnel reduced congestion at that intersection”
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    an underground tunnel with recesses where bodies were buried (as in ancient Rome)
    railroad tunnel
    a tunnel through which the railroad track runs
    subway, underpass
    an underground tunnel or passage enabling pedestrians to cross a road or railway
    type of:
    a passage between rooms or between buildings
  2. noun
    a hole made by an animal, usually for shelter
    synonyms: burrow
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    rabbit warren, warren
    a series of connected underground tunnels occupied by rabbits
    type of:
    hole, hollow
    a depression hollowed out of solid matter
  3. verb
    move through by or as by digging
    synonyms: burrow
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    type of:
    cut into, delve, dig, turn over
    turn up, loosen, or remove earth
  4. verb
    force a way through
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    type of:
    penetrate, perforate
    pass into or through, often by overcoming resistance
Word Family
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