Definition:

An artificial passage or archway for conducting canals or railroads under elevated ground, for the formation of roads under rivers or canals, and the construction of sewers, drains, and the like.

Part of Speech:

noun

Example Sentences: 

1. The subway train runs in tunnels under the city.
2. I can see the light at the end of the tunnel.

WOW Version:

Related posts:

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