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
For the next two years, David spent most of his time held captive in underground tunnels built beneath the Gaza Strip.
—
Miami Herald, 23 Jan. 2026
Kids love sliding and crawling through the tunnels that twist and turn.
—Kristine Sorensen, CBS News, 22 Jan. 2026
Metro staff said the tunnels there would be 500 feet underground and all the construction would be underground as well.
—Steve Scauzillo, Daily News, 22 Jan. 2026
The $225 million project, once completed, will bring water from deep within the lake through a system of tunnels, a pump station and existing water lines to the cities.
—Claire Osborn, Austin American Statesman, 21 Jan. 2026
In the wild, hamsters dig burrows with deep tunnels and multiple entrances for protection and to sleep during bouts of torpor.
—Noel Kirkpatrick, Treehugger, 20 Jan. 2026
Other pitfall tunnels have less free water and trap insects mainly through slippery surfaces and structure.
—Scott Travers, Forbes.com, 20 Jan. 2026
The westward expansion, including the tunnels and station, is estimated to cost $7 billion.
—Evan Simko-Bednarski, New York Daily News, 20 Jan. 2026
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
Miami Herald, 23 Jan. 2026
Kids love sliding and crawling through the tunnels that twist and turn.
—Kristine Sorensen, CBS News, 22 Jan. 2026
Metro staff said the tunnels there would be 500 feet underground and all the construction would be underground as well.
—Steve Scauzillo, Daily News, 22 Jan. 2026
The $225 million project, once completed, will bring water from deep within the lake through a system of tunnels, a pump station and existing water lines to the cities.
—Claire Osborn, Austin American Statesman, 21 Jan. 2026
In the wild, hamsters dig burrows with deep tunnels and multiple entrances for protection and to sleep during bouts of torpor.
—Noel Kirkpatrick, Treehugger, 20 Jan. 2026
Other pitfall tunnels have less free water and trap insects mainly through slippery surfaces and structure.
—Scott Travers, Forbes.com, 20 Jan. 2026
The westward expansion, including the tunnels and station, is estimated to cost $7 billion.
—Evan Simko-Bednarski, New York Daily News, 20 Jan. 2026
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
Recent Examples of Synonyms for tunnels
Noun
-
Such tools are only preserved in specific environments like in ice, caves or underwater.—
Adithi Ramakrishnan,
Los Angeles Times,
27 Jan. 2026
-
Prepare to hike down a dirt trail and then a narrow, steep stairwell that gives way to epic rock formations and captivating sea caves.—
Alanna Bennett,
Condé Nast Traveler,
26 Jan. 2026
Noun
-
During summer months, the Wyandotte Caves attract visitors who wish to explore the unique underground caverns.—
Robert Annis,
Midwest Living,
19 Jan. 2026
-
While the lake is said to have been discovered in 1905 by a 13-year-old boy named Ben Sands, the surrounding caverns were used by the Cherokee, and 20,000-year-old jaguar tracks were also found there.—
Lydia Mansel,
Travel + Leisure,
16 Jan. 2026
Cite this Entry
“Tunnels.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/tunnels. Accessed 30 Jan. 2026.
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