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
Arizona’s iconic saguaro cactuses seem like immobile sentinels standing watch over the Sonoran desert landscape.
—
John Leos, AZCentral.com, 10 Nov. 2025
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
See All Example Sentences for sentinel
John Leos, AZCentral.com, 10 Nov. 2025
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
See All Example Sentences for sentinel
Recent Examples of Synonyms for sentinel
Noun
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And so the city was exposed to future hurricanes, and lost the living guardians whose roots held the land in place.—
Melina Walling,
Los Angeles Times,
19 Feb. 2026
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Investigators determined Colgrove was the legal guardian for her 4-year-old grandson.—
Elissa Jorgensen,
Dallas Morning News,
16 Feb. 2026
Noun
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About 10 minutes later, one or two members of the group broke off to spray-paint vehicles and the guard booth.—
Emerson Clarridge
Updated February 17,
Fort Worth Star-Telegram,
18 Feb. 2026
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Wolverines junior guard Pierce Thompson scored 22 points and senior guard Amir Jones, who is going to Georgia State, scored 21 points including five 3-pointers.—
Steve Fryer,
Oc Register,
18 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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The Portuguese giant had been heading out of the Champions League on goal difference until the 6-foot-6-inch keeper rose superbly to head home a free kick and seal a dramatic 4-2 victory which put Benfica into the playoffs for the last 16.—
Patrick Snell,
CNN Money,
17 Feb. 2026
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Aliyah Chappell, also a junior, plays keeper.—
Dan Albano,
Oc Register,
17 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 19 Feb. 2026.
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