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Definition of "tunnel" []

  • An underground or underwater passage. (noun)
  • A passage through or under a barrier. (noun)
  • Obsolete The main flue on a chimney. (noun)
  • To make a tunnel through or under. (verb-transitive)
  • To produce, shape, or dig in the form of a tunnel. (verb-transitive)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Use "tunnel" in a sentence
  • "The train tunnel, which will be the longest such tunnel, is expected to open by the end of 2017 when construction is completed."
  • "Exploring the mine's main tunnel is a must for all visitors and it's an interesting experience during the day, to be sure — but at midnight ... well, that's another thing."
  • "When the twin tunnel is opened for traffic, probably in late 2017, it should cut the travel time between Zurich and Milan to 2 1/2 hours from 3 1/2 hours, and will provide the key north-south axis link between the ports of Rotterdam and Genoa."