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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Parents, guardians and others can also contribute up to $5,000 annually until children turn 18 years old.—
Jessica Dickler,Kate Dore, CFP®, EA,
CNBC,
28 Jan. 2026
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Apparently, the Meyers in Long Beach were ruled unfit as guardians, or Lynn refused to go back to them, so juvenile authorities located some blood relatives, possibly her father or half sister, and put her on a train back East.—
Literary Hub,
Literary Hub,
27 Jan. 2026
Noun
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In tennis, when the changing of the guard happens, the best often know.—
Patrick McEnroe,
New York Times,
28 Jan. 2026
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Sooners sixth-year guard Nijel Pack scored a game-high 22 points on 8-of-15 shooting, which included 6 for 11 from three-point range.—
Matt Byrne,
Arkansas Online,
28 Jan. 2026
Noun
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Your Kansas tax dollars pay for salaries of state employees, from university chancellors and aerospace researchers to prison guards and custodians.—
Eleanor Nash,
Kansas City Star,
29 Jan. 2026
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Additional pre-tax contributions of up to $5,000 a year are allowed but not required, and a parent is the custodian of the account until the child turns 18.—
Assistant Editor,
Los Angeles Times,
29 Jan. 2026
Noun
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Twenty minutes later, the warden and a representative from Immigration and Customs Enforcement showed them around.—
Jonathan Blitzer,
New Yorker,
19 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 siblings have different personalities, according to their keepers; Xiao Xiao is timid while his sister Lei Lei is fearless and adapts to changes quickly.—
Chris Lau,
CNN Money,
25 Jan. 2026
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Drake Maye ran for 68 yards and threw for 86 in sloppy, snowy conditions and scored New England’s only touchdown on a six-yard keeper, propelling the Patriots to their 12th Super Bowl with a 10-7 win over the Denver Broncos on Sunday.—
Los Angeles Times,
Los Angeles Times,
25 Jan. 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 30 Jan. 2026.
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