| Tunnel (n. .) A vessel with a broad mouth at one end, a pipe or tube at the other, for conveying liquor, fluids, etc., into casks, bottles, or other vessels |
| Tunnel (n. .) The opening of a chimney for the passage of smoke |
| Tunnel (n. .) An artificial passage or archway for conducting canals or railroads under elevated ground, for the formation of roads under rivers or canals, and the construction of sewers, drains, and the like. |
| Tunnel (n. .) A level passage driven across the measures, or at right angles to veins which it is desired to reach |
| Tunnel (v. t.) To form into a tunnel, or funnel, or to form like a tunnel |
| Tunnel (v. t.) To catch in a tunnel net. |
| Tunnel (v. t.) To make an opening, or a passageway, through or under |
| chunnel / Channel Tunnel the railroad tunnel between France and England under the English Channel |
| railroad tunnel a tunnel through which the railroad track runs |
| tunnel a passageway through or under something, usually underground (especially one for trains or cars), "the tunnel reduced congestion at that intersection" |
| wind tunnel a structure resembling a tunnel where air is blown at known velocities for testing parts of aircraft |
| carpal tunnel a passageway in the wrist through which nerves and the flexor muscles of the hands pass |
| burrow / tunnel a hole made by an animal, usually for shelter |
| carpal tunnel syndrome a painful disorder caused by compression of a nerve in the carpal tunnel, characterized by discomfort and weakness in the hands and fingers and by sensations of tingling, burning or numbness |
| tunnel vision visual impairment involving a loss of peripheral vision |
| tunnel force a way through |
| burrow / tunnel move through by or as by digging, "burrow through the forest" |