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
The festival expanded last year with the addition of winter wonderland character encounters, a half-dozen bounce houses and a light walk with tunnels of lights and inflatables, Sanchez said.
—
Julie Gallant, San Diego Union-Tribune, 6 Jan. 2026
Hochul said travel times through the Lincoln and Holland tunnels are both down.
—Jesse Zanger, CBS News, 5 Jan. 2026
Vehicles must exit tunnels and finish the trip on city streets.
—Aamir Khollam, Interesting Engineering, 31 Dec. 2025
The subterranean site, which closed 80 years ago, is noted for its architectural grandeur with chandeliers, glass skylights and tiled vaulted tunnels.
—Emma Bowman, NPR, 31 Dec. 2025
Drive by larger-than-life Christmas trees, glowing snowflakes, dancing candy canes, light tunnels and more.
—Caroline Ritzie, Cincinnati Enquirer, 28 Dec. 2025
These spirit tunnels can go viral but also be very awkward.
—Andy Hoglund, Entertainment Weekly, 9 Nov. 2025
The methodology, called deep borehole disposal, is achieved by drilling 18-inch vertical tunnels thousands of feet below ground, then turning horizontal.
—Bob Woods, CNBC, 9 Nov. 2025
Pore space creates essential tunnels for nutrients, water, and oxygen to move in the soil, further fortifying the roots and boosting plant growth.
—Megan Hughes, Better Homes & Gardens, 8 Nov. 2025
Julie Gallant, San Diego Union-Tribune, 6 Jan. 2026
Hochul said travel times through the Lincoln and Holland tunnels are both down.
—Jesse Zanger, CBS News, 5 Jan. 2026
Vehicles must exit tunnels and finish the trip on city streets.
—Aamir Khollam, Interesting Engineering, 31 Dec. 2025
The subterranean site, which closed 80 years ago, is noted for its architectural grandeur with chandeliers, glass skylights and tiled vaulted tunnels.
—Emma Bowman, NPR, 31 Dec. 2025
Drive by larger-than-life Christmas trees, glowing snowflakes, dancing candy canes, light tunnels and more.
—Caroline Ritzie, Cincinnati Enquirer, 28 Dec. 2025
These spirit tunnels can go viral but also be very awkward.
—Andy Hoglund, Entertainment Weekly, 9 Nov. 2025
The methodology, called deep borehole disposal, is achieved by drilling 18-inch vertical tunnels thousands of feet below ground, then turning horizontal.
—Bob Woods, CNBC, 9 Nov. 2025
Pore space creates essential tunnels for nutrients, water, and oxygen to move in the soil, further fortifying the roots and boosting plant growth.
—Megan Hughes, Better Homes & Gardens, 8 Nov. 2025
Recent Examples of Synonyms for tunnels
Noun
-
The hotel sits above a deep valley, with ancient caves built into the cliffs.—
Rosalyn Wikeley,
Condé Nast Traveler,
10 Jan. 2026
-
The park offers several hiking paths that explore caves along the base of the mountain and a trail that leads to the nearby town of Dénia.—
Liz Provencher,
Travel + Leisure,
9 Jan. 2026
Noun
-
Ice Castles in Silverton and Cripple Creek are a beloved stop for Coloradans and visitors to celebrate winter with slides, towers, tunnels and caverns.—
Christa Swanson,
CBS News,
9 Jan. 2026
-
While the coffins weren't suspended on cliff faces, many were elevated on stilts and placed in hard-to-access caverns, again suggesting a purposeful and ceremonial ritual.—
New Atlas,
New Atlas,
27 Dec. 2025
Cite this Entry
“Tunnels.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/tunnels. Accessed 21 Jan. 2026.
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