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
That majestic array of green-gray gneiss sentinels may be the most conceptually elaborate Neolithic monument in Europe.
—
Alex Ross, New Yorker, 24 Nov. 2025
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
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
Alex Ross, New Yorker, 24 Nov. 2025
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
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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Parents, guardians, aunts and uncles don't have time to read every book on the shelf while trying to pick something for the young reader in their life, so here are some simple ways to determine if a book is suitable for that child.—
Cody Godwin,
USA Today,
2 Apr. 2026
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Hernandez listed herself as Ruben’s guardian or emergency contact in paperwork with North Shore Medical Center, Golden Glades Nursing and Rehabilitation Center and Larkin Community Hospital — though Ruben and Carmen were married.—
Carol Marbin Miller,
Miami Herald,
2 Apr. 2026
Noun
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The Raptors dared Mitchell to shoot early, with the former Raptors guard scoring the Heat’s first seven points and nine of the team’s first 12.—
Ira Winderman,
Sun Sentinel,
8 Apr. 2026
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Buchanon mainly played guard at FIU, but can also play center, where’s taken most of his reps with TCU this spring.—
Steven Johnson,
Fort Worth Star-Telegram,
8 Apr. 2026
Noun
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Jimenez, who works as a custodian, said that shopping at the non profit's market saves her family a lot of money.—
Michele Gile,
CBS News,
2 Apr. 2026
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Night custodians were finishing up their rounds.—
Literary Hub,
Literary Hub,
1 Apr. 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
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Carroll keeper Sophie Adcock, who was superb in goal in the match, didn’t have a chance as Brundage buried it in the back of the net.—
Darren Lauber,
Fort Worth Star-Telegram,
5 Apr. 2026
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Reus took matters into his hands to tie the score six minutes later, putting a sharp right-footed shot on goal that Minnesota keeper Drake Callender parried away, then Reus jumped on the rebound with his left foot and lifted the ball over Callender, who was still on the ground.—
Los Angeles Times,
Los Angeles Times,
5 Apr. 2026
Noun
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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 8 Apr. 2026.
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