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[tuhn-l] /ˈtʌn l/
an underground passage.
a passageway, as for trains or automobiles, through or under an obstruction, as a city, mountain, river, harbor, or the like.
an approximately horizontal gallery or corridor in a mine.
the burrow of an animal.
Dialect. a funnel.
verb (used with object), tunneled, tunneling or (especially British) tunnelled, tunnelling.
to construct a passageway through or under:
to tunnel a mountain.
to make or excavate (a tunnel or underground passage):
to tunnel a passage under a river.
to move or proceed by or as if by boring a tunnel:
The river tunneled its way through the mountain.
to pierce or hollow out, as with tunnels.
verb (used without object), tunneled, tunneling or (especially British) tunnelled, tunnelling.
to make a tunnel or tunnels:
to tunnel through the Alps.
late Middle English
1400-50; late Middle English tonel (noun) < Middle French tonele, tonnelle funnel-shaped net, feminine of tonnel cask, diminutive of tonne tun; see -elle
Related forms
tunneler; especially British, tunneller, noun
tunnellike, adjective
subtunnel, noun
untunneled, adjective
untunnelled, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for tunnel
  • The hike into a several-hundred-year-old tunnel of hardened lava gives you an inside glimpse of a volcano's power.
  • Talk about the selfish tunnel vision of the privileged.
  • Frankly, it never would have occurred to me to test flying squirrels in a wind tunnel.
  • Notice how the brick-lined arcades match the train tunnel below.
  • The loser breaks free and rushes into a tunnel lined with a plastic tube.
  • He did his tests at night when power was cheaper, sleeping on a cot next to the tunnel.
  • Specifically, it looms in the emotionally frigid tunnel of air between the owner's box and the team bench.
  • We may see the light at the end of the tunnel, but we've got a ways to go.
  • Small, scary orifices of the tunnel system open all over the island.
  • Perhaps it's unfair of me, but it seems to me that there's a lot of tunnel vision in these proposals.
British Dictionary definitions for tunnel


an underground passageway, esp one for trains or cars that passes under a mountain, river, or a congested urban area
any passage or channel through or under something
a dialect word for funnel
(obsolete) the flue of a chimney
verb -nels, -nelling, -nelled (US) -nels, -neling, -neled
(transitive) to make or force (a way) through or under (something): to tunnel a hole in the wall, to tunnel the cliff
(intransitive; foll by through, under, etc) to make or force a way (through or under something): he tunnelled through the bracken
Derived Forms
tunneller, (US) tunneler, noun
Word Origin
C15: from Old French tonel cask, from tonne tun, from Medieval Latin tonna barrel, of Celtic origin
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for tunnel

mid-15c., "funnel-shaped net for catching birds," from Middle French tonnelle "net," or tonel "cask," diminutive of Old French tonne "tun, cask for liquids," possibly from the same source as Old English tunne (see tun).

Sense of "tube, pipe" (1540s) developed in English and led to sense of "underground passage," which is first attested 1765, about five years after the first modern tunnel was built (on the Grand Trunk Canal in England). This sense subsequently has been borrowed into French (1878). The earlier native word for this was mine. Meaning "burrow of an animal" is from 1873. Tunnel vision first recorded 1949. The figurative phrase light at the end of the tunnel is attested from 1922.


"excavate underground," 1795, from tunnel (n.).

Online Etymology Dictionary, © 2010 Douglas Harper
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tunnel in Medicine

tunnel tun·nel (tŭn'əl)
A passage located through or under a barrier.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Slang definitions & phrases for tunnel



Music, esp popular: new tunes on my iPod

The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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Idioms and Phrases with tunnel
The American Heritage® Idioms Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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