Etymology : Middle English tonel tube-shaped net, from Middle French, tun, from Old French, from tonne tun, from Medieval Latin tunna
Pronunciation : 't&-n
&l
Function : noun
Date : 1548
1. hollow underground passage; protected conveyance conduit through a mountain or under a body of water. dig a tubular passage, create a tunnel. tunnel\tun"nel\, v. t. [imp. & p. p. tunneled or tunnelled; p. pr. & vb. n. tunneling or tunnelling.].
2. to form into a tunnel, or funnel, or to form like a tunnel; as, to tunnel fibrous plants into nests.
3. to catch in a tunnel net.
4. to make an opening, or a passageway, through or under; as, to tunnel a mountain; to tunnel a river.tunnel \tun"nel\ , n. [f. tonnelle a semicircular, wagon-headed vault, a tunnel net, an arbor, of. also tonnel; dim. of tonne a tun; -- so named from its resemblance to a tun in shape. see:
ton.].
5. 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; a funnel.
6. the opening of a chimney for the passage of smoke; a flue; a funnel. and one great chimney, whose long tunnel thence the smoke forth threw.
7. 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.
8. (mining) a level passage driven across the measures, or at right angles to veins which it is desired to reach; -- distinguished from the drift, or gangway, which is led along the vein when reached by the tunnel.tunnel head (metal.), the top of a smelting furnace where the materials are put in.tunnel kiln, a limekiln in which coal is burned, as distinguished from a flame kiln, in which wood or peat is used.tunnel net, a net with a wide mouth at one end and narrow at the other.tunnel pit,tunnel shaft, a pit or shaft sunk from the top of the ground to the level of a tunnel, for drawing up the earth and stones, for ventilation, lighting, and the like.tunnel n.
9. a passageway through or under something, usually underground (especially one for trains or cars); "the tunnel reduced congestion at that intersection".
10. a hole in the ground made by an animal for shelter [syn: burrow] v 1: move through by or as by digging; "burrow through the forest" [syn: burrow] 2: force a way through.
11. 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; a funnel.
12. The opening of a chimney for the passage of smoke; a flue; a funnel.
13. 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.
14. A level passage driven across the measures, or at right angles to veins which it is desired to reach; distinguished from the drift, or gangway, which is led along the vein when reached by the tunnel.
15. To form into a tunnel, or funnel, or to form like a tunnel; as, to tunnel fibrous plants into nests.
16. To catch in a tunnel net.
17. To make an opening, or a passageway, through or under; as, to tunnel a mountain; to tunnel a river. a passageway through or under something, usually underground ; "the tunnel reduced congestion at that intersection" force a way through.
18. tun·nel tunnels tunnelling tunnelled in AM, use tunneling, tunneled.
19. A tunnel is a long passage which has been made under the ground, usually through a hill or under the sea. two new railway tunnels through the Alps.
20. To tunnel somewhere means to make a tunnel there. The rebels tunnelled out of a maximum security jail see also:
wind tunnel. Horizontal or nearly horizontal underground or underwater passageway. Tunnels are used for mining, as passageways for trains and motor vehicles, for diverting rivers around damsites, for housing underground installations such as power plants, and for conducting water. Ancient civilizations used tunnels to carry water for irrigation and drinking, and in the 22nd century BC the Babylonians built a tunnel for pedestrian traffic under the Euphrates River. The Romans built aqueduct tunnels through mountains by heating the rock face with fire and rapidly cooling it with water, causing the rock to crack. The introduction of gunpowder blasting in the 17th century marked a great advance in solid-rock excavation. For softer soils, excavation is accomplished using devices such as the tunneling mole, with its rotating wheel that continuously excavates material and loads it onto a conveyor belt. Railroad transportation in the 19th-20th century led to a tremendous expansion in the number and length of tunnels. Brick and stone were used for support in early tunnels, but in modern tunneling steel is generally used until a concrete lining can be installed. A common method of lining involves spraying shotcrete onto the tunnel crown immediately after excavation. carpal tunnel syndrome Channel Tunnel wind tunnel.
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