tunnel
Americannoun
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an underground passage.
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a passageway, as for trains or automobiles, through or under an obstruction, as a city, mountain, river, harbor, or the like.
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an approximately horizontal gallery or corridor in a mine.
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the burrow of an animal.
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Dialect. a funnel.
verb (used with object)
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to construct a passageway through or under.
to tunnel a mountain.
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to make or excavate (a tunnel or underground passage).
to tunnel a passage under a river.
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to move or proceed by or as if by boring a tunnel.
The river tunneled its way through the mountain.
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to pierce or hollow out, as with tunnels.
verb (used without object)
noun
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an underground passageway, esp one for trains or cars that passes under a mountain, river, or a congested urban area
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any passage or channel through or under something
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a dialect word for funnel
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obsolete the flue of a chimney
verb
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(tr) to make or force (a way) through or under (something)
to tunnel a hole in the wall
to tunnel the cliff
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(intr; foll by through, under, etc) to make or force a way (through or under something)
he tunnelled through the bracken
Other Word Forms
Derived Forms
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subtunnelnoun
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tunnelernoun
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tunnellernoun
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tunnellikeadjective
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untunneledadjective
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untunnelledadjective
Inflected Forms
Nouns
Participles
Conjugated Forms
Present
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tunnelsimple
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tunnelssimple
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have tunneledperfect
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have tunnelledperfect
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has tunneledperfect
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has tunnelledperfect
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am tunnelingprogressive
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am tunnellingprogressive
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are tunnelingprogressive
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are tunnellingprogressive
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is tunnelingprogressive
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is tunnellingprogressive
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have been tunnelingperfect progressive
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have been tunnellingperfect progressive
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has been tunnelingperfect progressive
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has been tunnellingperfect progressive
Past
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tunneledsimple
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tunnelledsimple
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had tunneledperfect
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had tunnelledperfect
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was tunnelingprogressive
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was tunnellingprogressive
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were tunnelingprogressive
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were tunnellingprogressive
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had been tunnelingperfect progressive
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had been tunnellingperfect progressive
Future
Etymology
Origin of tunnel
1400–50; late Middle English tonel (noun) < Middle French tonele, tonnelle funnel-shaped net, feminine of tonnel cask, diminutive of tonne tun; see -elle
Explanation
A tunnel is a passage that runs underground or through something, like a train tunnel that cuts through a mountain. Some theme parks have networks of underground tunnels so that employees can move around out of sight of visitors. Some tunnels, like New York's Lincoln Tunnel and the Holland Tunnel, which connect New York City to New Jersey, are large and solid enough to drive cars through. Others are much smaller, like the tunnels small animals dig through snow or soil for safety and shelter. As a verb, tunnel means "dig a tunnel" or "force through," the way your neighborhood groundhog tunnels under your dad's vegetable garden.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Through a second tunnel dug by the Chileans, in the early morning of June 30, they heard Gil's voice faintly.
From Barron's • Jul. 7, 2026
And by kickoff later that afternoon, Balogun was walking out of the tunnel alongside his teammates.
From The Wall Street Journal • Jul. 7, 2026
"If you go in at night, you see the eyes of the tarantulas that live inside. But once you walk down a ten-meter-long tunnel underground, you start finding the fossils."
From Science Daily • Jul. 5, 2026
"The details are quite closely guarded, but it will travel through the tunnel," Cullinan told BBC Radio 4, referring to the Channel tunnel that connects the UK and France.
From Barron's • Jul. 1, 2026
Now they did not know how long they had been in the tunnel.
From "Rowan of Rin" by Emily Rodda
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
