as in guardian
a person or group that watches over someone or something
a lone sentinel kept watch over the fort
Synonyms & Similar Words
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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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Children under 13 can’t create an account without a guardian.—
Amy Thomson,
Bloomberg,
25 Mar. 2026
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If a student is caught with a device anytime after, it will be confiscated until their parent or guardian can pick it up.—
Adam Thompson,
CBS News,
24 Mar. 2026
Noun
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Furthermore, the complex is set to go back on the market, a pending sale that caught tenants off guard.—
Charlotte Observer,
Charlotte Observer,
25 Mar. 2026
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Witten Van Hoy, Wesley Harvey and Samir Camacho all stood out physically and will have a chance to compete with some older veterans like transfer guards Jaheim Buchanon and Noah McKinney.—
Steven Johnson,
Fort Worth Star-Telegram,
24 Mar. 2026
Noun
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Athletic coaches, people responding to emergencies, people supervising inmates, custodians, and people helping children who need bathroom assistance get a pass.—
ABC News,
ABC News,
26 Mar. 2026
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After the Soviet Union collapsed, the United States spent years — and billions of dollars through the Nunn-Lugar program — scrambling to secure biological, chemical, and nuclear stockpiles that suddenly had no reliable custodian.—
Ashish K. Jha,
STAT,
25 Mar. 2026
Noun
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The sheriff also said the warden had reached out regarding an allegation of an incident under the Prison Rape Elimination Act, but then did not call the department back to further investigate.—
Teri Figueroa,
San Diego Union-Tribune,
26 Mar. 2026
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On this gravelly, dusty, single lane, Bob Markle applied a pursuit trick that wardens learn early.—
Dave Duffey,
Outdoor Life,
26 Mar. 2026
Noun
-
Neither keeper faced a shot on goal in a scoreless first half.—
ABC News,
ABC News,
22 Mar. 2026
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Dante Sealy put a dangerous corner into the box, then SKC keeper John Pulskamp unconvincingly parried it off the crossbar and down to a thankful Frederick, who cleaned up for an easy one.—
Braidon Nourse,
Denver Post,
22 Mar. 2026
Noun
-
The soldiers would have stayed as sentries before and after the performance, symbolically guarding the legacy of Taiwan’s founder.—
Timothy Nerozzi,
The Washington Examiner,
13 Mar. 2026
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Police had taped off several square blocks around Sixth Street, while local police and federal authorities, including Bureau of Alcohol, Tobacco, Firearms and Explosives agents, were at the site, according to Austin police officers serving as sentries.—
Jack Myer,
Los Angeles Times,
1 Mar. 2026
Cite this Entry
“Sentinel.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/sentinel. Accessed 29 Mar. 2026.
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