as in cave
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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Example Sentences
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Recent Examples of tunnel
The route winds through 36 tunnels, including the historic Moffat Tunnel, before reaching the ski slopes.
—
Sponsored Content, Denver Post, 27 Mar. 2026
Satellite images indicate that the Iranians subsequently broke through the rubble to open the tunnel entrances, perhaps to gain access to the nuclear materials.
—Sheena Samu, CBS News, 27 Mar. 2026
As the Wolverines made their way off the KeyBank Center court with their Sweet 16 ticket punched, Lendeborg grabbed a white hat and a Sharpie from one of the kids hankering for autographs near the tunnel exit.
—Dana O’Neil, CNN Money, 27 Mar. 2026
Those who supported The Boring Company in public hearings praised Music City Loop’s potential to create construction jobs in the city, and hoped the tunnels would alleviate traffic congestion in Nashville.
—Lora Kolodny, CNBC, 26 Mar. 2026
See All Example Sentences for tunnel
Sponsored Content, Denver Post, 27 Mar. 2026
Satellite images indicate that the Iranians subsequently broke through the rubble to open the tunnel entrances, perhaps to gain access to the nuclear materials.
—Sheena Samu, CBS News, 27 Mar. 2026
As the Wolverines made their way off the KeyBank Center court with their Sweet 16 ticket punched, Lendeborg grabbed a white hat and a Sharpie from one of the kids hankering for autographs near the tunnel exit.
—Dana O’Neil, CNN Money, 27 Mar. 2026
Those who supported The Boring Company in public hearings praised Music City Loop’s potential to create construction jobs in the city, and hoped the tunnels would alleviate traffic congestion in Nashville.
—Lora Kolodny, CNBC, 26 Mar. 2026
See All Example Sentences for tunnel
Recent Examples of Synonyms for tunnel
Noun
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This research can enable highly functional, autonomous, tiny aerial robots for critical humanitarian applications, such as search and rescue, combating poaching and cave exploration.—
Nitin Sanket,
The Conversation,
27 Mar. 2026
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The discovery of a canine jawbone in a cave in southern England suggests that dogs were domesticated 5,000 years earlier than previously thought.—
Tom Chivers,
semafor.com,
27 Mar. 2026
Noun
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Decades of static storage lead to the unavoidable accumulation of heavy waxes, dense inorganic sediments, and highly corrosive hydrogen sulfide produced by sulfate-reducing bacteria — turning the bottom of the cavern into a chemical nightmare.—
Siddharth Misra,
Fortune,
28 Mar. 2026
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Few caverns possess the same cache of fossils as Bender’s Cave, however.—
Andrew Paul,
Popular Science,
26 Mar. 2026
Noun
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Desensitize to loud or unusual noises—play recordings of transit sounds—such as subway announcements or car horns—while offering treats to create positive associations.—
Lucy Notarantonio,
MSNBC Newsweek,
1 Apr. 2026
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The Council is proposing expanding the benefit to cover the entirety of a subway or local bus fare for those eligible, effectively making transit free for New Yorkers below the threshold, a move that echoes calls from transit advocates.—
Evan Simko-Bednarski,
New York Daily News,
1 Apr. 2026
Cite this Entry
“Tunnel.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/tunnel. Accessed 3 Apr. 2026.
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