tunnel

American  

[tuhn-l] / ˈtʌn l /

noun

1. an underground passage.

2. a passageway, as for trains or automobiles, through or under an obstruction, as a city, mountain, river, harbor, or the like.

3. an approximately horizontal gallery or corridor in a mine.

4. the burrow of an animal.

5. Dialect. a funnel.

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verb (used with object)

tunneled, tunneling, tunnelled, tunnelling

1. to construct a passageway through or under.

   to tunnel a mountain.

2. to make or excavate (a tunnel or underground passage).

   to tunnel a passage under a river.

3. to move or proceed by or as if by boring a tunnel.

   The river tunneled its way through the mountain.

4. to pierce or hollow out, as with tunnels.

verb (used without object)

tunneled, tunneling, tunnelled, tunnelling

1. to make a tunnel or tunnels.

   to tunnel through the Alps.

tunnel British  

/ ˈtʌnəl /

noun

1. an underground passageway, esp one for trains or cars that passes under a mountain, river, or a congested urban area

2. any passage or channel through or under something

3. a dialect word for funnel

4. obsolete the flue of a chimney

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verb

1. (tr) to make or force (a way) through or under (something)

   to tunnel a hole in the wall

   to tunnel the cliff

2. (intr; foll by through, under, etc) to make or force a way (through or under something)

   he tunnelled through the bracken

tunnel Idioms  

1. see light at the end of the tunnel.

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Other Word Forms

• subtunnel noun
• tunneler noun
• tunneller noun
• tunnellike adjective
• untunneled adjective
• untunnelled adjective

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; -elle

Example Sentences

Even without that rosy scenario, traders can already see some light at the end of the tunnel.

From Barron's • Apr. 2, 2026

At Isfahan, for example, satellite imagery from February indicated all entrances to its tunnel complex appeared to be sealed off with earth, which would make any operation more difficult.

From BBC • Mar. 31, 2026

And don’t get me started on my strained hand with carpal tunnel syndrome from all the clicking.

From The Wall Street Journal • Mar. 30, 2026

“Based on the current analysis of soil conditions, tunnel depths, and tunnel design,” the study found, “Metro predicts that noise and vibration from tunnel construction and subway operations would not be perceptible above the tunnels.”

From Los Angeles Times • Mar. 26, 2026

Her voice is echoey, like she’s in a tunnel.

From "Red Flags and Butterflies" by Sheryl Azzam

Related Words

• channel
• hole
• mine
• pit
• shaft
• subway
• underpass