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 …

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 …

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

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.

Dec 15, 2025 · a tunnel [1-2] in Wuppertal A pedestrian tunnel. The part marked 8 is the tunnel and belly

4 days ago · The tunnel is 20 feet wide, nearly 400 feet long and descends at a 7 percent grade — the same slope as Interstate 70 through harrowing Vail Pass in the Rocky Mountains, …

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

Definition of tunnel noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Feb 13, 2025 · Tunnel construction is expected to begin in 2026. The VTA BART Silicon Valley Phase II Extension involves 5 miles of single-bore tunnel under downtown San Jose that will …