A vessel with a broad mouth at one end, and a pipe or tube at the other, for conveying liquor, fluids, etc., into casks, bottles, or other vessels; a funnel.
The opening of a chimney for the passage of smoke; a flue; a funnel.
An artificial passage or archway for conducting canals, roads, or railroads under elevated ground, for the formation of roads under rivers or canals, and the construction of sewers, drains, and the like.
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.
To form into a tunnel, or funnel, or to form like a tunnel; as, to tunnel fibrous plants into nests.
To make an opening, or a passageway, through or under; as, to tunnel a mountain; to tunnel a river.
To make a tunnel; as, to tunnel under a river.
A fairly level underground passage open to the surface at both ends.
a passageway constructed to allow trains to travel through mountains or under water.
An underground conduit, often deep and expensive to construct, which provides conveyance and/or storage volumes for wastewater, often involving minimal surface disruption.
Similar to a shaft, but driven horizontally into a mountain side. It can also be driven horizontally from the bottom of a shaft, or from any location on the shaft that the foreman decides upon. It is also known as a “drift”.
a large, underground structure used to store and transport wastewater, combined sewage or storm water during rain storms. Tunnels usually have higher storage capacities than basins and are capable of transporting their flows directly to a wastewater treatment plant.
Specifically, a tunnel is a cavity with a long horizontal or nearly-horizontal dimension and short dimensions at right angles to this long dimension that has an opening or portal at each end. More generally, a tunnel is the generalization of addit, drift and tunnel.
a passageway through or under something, usually underground (especially one for trains or cars); "the tunnel reduced congestion at that intersection"
an underground or underwater passage that is primarily horizontal
a passage through a mountain or under a waterway , road or railroad
An underground road or passage
A nuclear device exploded at the end of a long horizontal drift mined into a mountain or mesa in a way that places the burst point deep within the earth.
An underground passage for vehicles or pedestrians, especially one which is created by digging into earth. Occasionally, tunnel structures are built in an excavated area then covered over.
An underground passageway, esp. one for trains or cars. Any passage through or under something.
An artificial underground passage built though a hill, through which track is laid allowing trains to pass.
Subterranean passageway created artificially to allow for communication from one place to another. Construction which comprises a long cylindrical cavity.
A horizontal, or near-horizontal, underground passage, entry, or haulageway, that is open to the surface at both ends. A tunnel (as opposed to an adit) must pass completely through a hill or mountain. Return to TERMS MENU
linear underground passageway open at both ends.
The underground passageway used by Metrorail cars.
An underground passage open to daylight at both ends.
a tunnel used to carry a roadway through a mountain or under a river instead of around or over those obstacles. Tunnels can be very expensive to construct and maintain due to drilling and ventilation requirements. Generally, most tunnels are located in mountainous or hilly regions, and examples include the Fort Pitt Tunnel (Interstate 279) in Pittsburgh and the Waldo Tunnel (U.S. 101) north of San Francisco.
A horizontal passageway through or under an obstruction; also called Wolfram. 2. Tungsten Steel.
A tunnel is an underground passage. The definition of what constitutes a tunnel is not universally agreed upon. However, in general tunnels have a ratio of the length of the passage to the width of at least 2 to 1.