It is dug through surrounding soil, earth or rock, or laid under water, and is usually completely enclosed except for the two portals common at each end, though there may be access and ventilation …

5 days ago · A federal judge has ordered the Trump administration to restore funding for a new rail tunnel between New York and New Jersey.

Dec 19, 2025 · tunnels and underground excavations, horizontal underground passageway produced by excavation or occasionally by nature’s action in dissolving a soluble rock, such as limestone. A …

The meaning of TUNNEL is a covered passageway; specifically : a horizontal passageway through or under an obstruction. How to use tunnel in a sentence.

Dec 4, 2025 · Contrary to showing only advanced tunneling technology, these tunnels are a hallmark of mankind’s ability to build structures that overcome geographical barriers. Modern tunnel construction...

Constructing a tunnel is one of the most complex challenges in the field of civil engineering. Learn about the basics behind tunnels.

TUNNEL meaning: 1. a long passage under or through the ground, especially one made by people: 2. the long passage…. Learn more.

TUNNEL definition: an underground passage. See examples of tunnel used in a sentence.

A tunnel is a long passage which has been made under the ground, usually through a hill or under the sea. Boston drivers love the tunnel.

Tunnels are dug in types of materials varying from soft clay to hard rock.