Bedeutung von “tunnel” — Learner’s Dictionary

tunnel

noun [ C ] us uk /ˈtʌnəl/
The trees rendered the road as dark as a tunnel.Supports are used to stop the roof of the tunnel collapsing.Large drilling machines were used to cut the tunnel in the rock.Passenger trains and freight trains use the tunnel.The Lincoln Tunnel runs underneath the Hudson river.

B1 a long passage under the ground or through a mountain:

The train went into the tunnel.
→ See also light at the end of the tunnel

(Definition von “tunnel noun” aus dem Cambridge Learner's Dictionary © Cambridge University Press)