as in caves
a passage that goes under the ground, through a hill, etc.
The train goes through a tunnel in the mountain. The moles dug tunnels in the yard.
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Recent Examples of tunnels
But eventually there is light at the end of these tunnels.
—
Letters To The Editor, The Orlando Sentinel, 10 May 2026
Once new tunnels are completed and the old tunnel repaired, trans-Hudson capacity has the potential to double.
—Tom Wright, New York Daily News, 8 May 2026
Rat tunnels, which may have an opening that’s 3 inches in diameter, are found in less conspicuous spots, such as near wood piles.
—Arricca Elin Sansone, Southern Living, 6 May 2026
In some cases, procedural or surgical interventions may be necessary to address persistent tunnels or scarring.
—Lauryn Higgins, Flow Space, 6 May 2026
The best time for insecticide application is after dark when the bees are in the tunnels.
—Mary Marlowe Leverette, The Spruce, 5 May 2026
Starting in Chur, the oldest town in Switzerland, the 76-mile route crosses 196 bridges and passes through 55 tunnels.
—Taryn White, Travel + Leisure, 4 May 2026
The military also shared video purporting to show the insides of the tunnels.
—Mustafa Qadri, CNN Money, 28 Apr. 2026
This is software that encrypts data traffic and routes it through private tunnels to secure servers to prevent anyone from being able to read it.
—ABC News, 22 Apr. 2026
Letters To The Editor, The Orlando Sentinel, 10 May 2026
Once new tunnels are completed and the old tunnel repaired, trans-Hudson capacity has the potential to double.
—Tom Wright, New York Daily News, 8 May 2026
Rat tunnels, which may have an opening that’s 3 inches in diameter, are found in less conspicuous spots, such as near wood piles.
—Arricca Elin Sansone, Southern Living, 6 May 2026
In some cases, procedural or surgical interventions may be necessary to address persistent tunnels or scarring.
—Lauryn Higgins, Flow Space, 6 May 2026
The best time for insecticide application is after dark when the bees are in the tunnels.
—Mary Marlowe Leverette, The Spruce, 5 May 2026
Starting in Chur, the oldest town in Switzerland, the 76-mile route crosses 196 bridges and passes through 55 tunnels.
—Taryn White, Travel + Leisure, 4 May 2026
The military also shared video purporting to show the insides of the tunnels.
—Mustafa Qadri, CNN Money, 28 Apr. 2026
This is software that encrypts data traffic and routes it through private tunnels to secure servers to prevent anyone from being able to read it.
—ABC News, 22 Apr. 2026
Recent Examples of Synonyms for tunnels
Noun
-
The idea is that the caves shall connect, & each comes to daylight at the present moment — Dinner!—
Literary Hub,
Literary Hub,
11 May 2026
-
The rest of Curaçao’s eclectic must-dive list includes reefs, underwater caves, sunken ships, cars, and even an airplane wreck, all with healthy coral growth that attracts and sustains marine life.—
Erik Trinidad,
Travel + Leisure,
8 May 2026
Noun
-
Fire made the inhospitable conditions of caves more bearable, as caverns were often cold, dark, damp, and home to other residents like lions, bears, and hyenas, which had to be displaced.—
Literary Hub,
Literary Hub,
1 May 2026
-
Back at Big Thunder, there will be other fresh surprises, including 2,000 bats added in the approach to the ride’s rainbow caverns.—
Dewayne Bevil,
The Orlando Sentinel,
30 Apr. 2026
Cite this Entry
“Tunnels.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/tunnels. Accessed 15 May. 2026.
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