Definition, Meaning & Synonyms

tunnel

noun

/ˈtʌn.əl/

Definition

A tunnel is an underground or underwater passage that is dug through the earth or through a structure, usually for the purpose of facilitating transportation or utilities.

Examples

The subway tunnel runs for miles beneath the city.
Workers dug a tunnel to connect the two sides of the mountain.
During the storm, the floodwaters filled the tunnel, causing significant damage.