as in guardian
a person or group that watches over someone or something
a lone sentinel kept watch over the fort
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Example Sentences
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Recent Examples of sentinel
The world’s lakes are considered sentinels of climate change and are warming dramatically as global temperatures rise.
—
Laura Paddison, CNN Money, 6 Nov. 2025
By removing friction, letting AI handle the heavy lifting and investing in modern SAT/PST, leaders transform reluctant users into proactive sentinels.
—Eyal Benishti, Forbes.com, 19 Sep. 2025
The satellite, Space Weather Follow-On L1 (SWFO-L1), is launching just in time, as scientists warn our aging fleet of solar sentinels is reaching the end of its life.
—Daisy Dobrijevic, Space.com, 19 Sep. 2025
The sentinels of conventional wisdom settled on the view that the Iraq invasion was one of the great own goals of American foreign policy, and that its beneficiary was Iran.
—Graeme Wood, The Atlantic, 2 Sep. 2025
See All Example Sentences for sentinel
Laura Paddison, CNN Money, 6 Nov. 2025
By removing friction, letting AI handle the heavy lifting and investing in modern SAT/PST, leaders transform reluctant users into proactive sentinels.
—Eyal Benishti, Forbes.com, 19 Sep. 2025
The satellite, Space Weather Follow-On L1 (SWFO-L1), is launching just in time, as scientists warn our aging fleet of solar sentinels is reaching the end of its life.
—Daisy Dobrijevic, Space.com, 19 Sep. 2025
The sentinels of conventional wisdom settled on the view that the Iraq invasion was one of the great own goals of American foreign policy, and that its beneficiary was Iran.
—Graeme Wood, The Atlantic, 2 Sep. 2025
See All Example Sentences for sentinel
Recent Examples of Synonyms for sentinel
Noun
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But parents and guardians can enroll now by filling out Form 4547 through the IRS when filing their tax returns.—
Lisa Hagen,
Hartford Courant,
11 Feb. 2026
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Some kids are ferried by a parent or guardian; Lamia transports herself.—
Richard Brody,
New Yorker,
10 Feb. 2026
Noun
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Freshman guard Meleek Thomas added 20 points and had three steals.—
Matt Byrne,
Arkansas Online,
11 Feb. 2026
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Midway through the fourth quarter, Lee was ejected and had to be restrained by Hornets guard Brandon Miller while yelling at officials for a no-call after Charlotte’s Grant Williams collided with Detroit’s Paul Reed.—
Steve Reed,
Los Angeles Times,
10 Feb. 2026
Noun
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Mark Glende, Rosemount, is an elementary school custodian.—
Mark Glende,
Twin Cities,
1 Feb. 2026
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The board also approved cutting positions at multiple school sites, including assistant principals, high school teachers, special education specialists, custodians and secretaries, as well as the district’s only communications director.—
Kyle Martin,
Mercury News,
31 Jan. 2026
Noun
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On January 20th, Senators Alex Padilla and Adam Schiff toured the facility and spoke with the warden as part of an oversight visit.—
Oren Peleg,
New Yorker,
28 Jan. 2026
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In it, the warden confirmed lights are on 24/7.—
Mirella Brussani,
CBS News,
19 Jan. 2026
Noun
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Now, a constellation of nonprofits, private companies, and politicians are confident that this third plan is a keeper.—
Justin Davidson,
Curbed,
10 Feb. 2026
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Even after Poteet equalized, Woodrow battled back to knock in a rebound off the keeper from Ramirez for the eventual 2-1 win.—
Ishmael Johnson,
Dallas Morning News,
7 Feb. 2026
Noun
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Kochab is the brighter of the two outer stars in the bowl of the Little Dipper (the other being Pherkad), which seem to march in a circle like sentries around Polaris, the North Star.—
Joe Rao,
Space.com,
14 Dec. 2025
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The incident occurred while one of the Royal Canadian Navy’s Rigid Hull Inflatable Boats (RHIB) was returning from its sentry duties off Bentinck Island.—
Colson Thayer,
PEOPLE,
10 Dec. 2025
Cite this Entry
“Sentinel.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/sentinel. Accessed 16 Feb. 2026.
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