as in guardian
a person or group that watches over someone or something
a lone sentinel kept watch over the fort
Synonyms & Similar Words
Relevance
Example Sentences
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
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
-
Parents and guardians are notified if their child was marked absent.—
Kendrick Calfee,
Kansas City Star,
4 Mar. 2026
-
By examining samples from a broad range of environments, researchers are increasingly finding more types of Asgard microbes, such as Heimdallarchaeia, named for the guardian of Asgard.—
Ashley Strickland,
CNN Money,
4 Mar. 2026
Noun
-
In these situations, fire watch guards may be assigned to monitor the property when regular staff is unavailable.—
Matthew Kayser,
Miami Herald,
11 Mar. 2026
-
Smart played his usual smothering defense, doing a very good job in limiting Timberwolves All-Star guard Anthony Edwards to just 14 points on two-for-15 shooting from the field and one-for-10 from three-point range.—
Assistant Sports Editor,
Los Angeles Times,
11 Mar. 2026
Noun
-
Of the 221 positions being cut — which include paraeducators, assistants, clerks, custodians, special-education staff, food service staff and more — 88 are already vacant, the district said.—
Jemma Stephenson,
San Diego Union-Tribune,
5 Mar. 2026
-
Classified employees — or non-teaching staff who support school operations such instructional aids, paraprofessionals, custodians, food service workers and bus drivers — will not hold a collective sympathy strike, although individual members are legally allowed to do so.—
Jennah Pendleton,
Sacbee.com,
3 Mar. 2026
Noun
-
After finishing the conversation, Harris, still struck by the insight of the prison doctor, asked a warden how long the man had worked in the prison.—
Costa Beavin Pappas,
Los Angeles Times,
2 Mar. 2026
-
His father was the warden there, and Dominique was teased for it mercilessly at school.—
Gaby Wood,
Vogue,
21 Feb. 2026
Noun
-
Both keepers had three saves in a scoreless first half.—
Dallas Morning News,
Dallas Morning News,
8 Mar. 2026
-
Oh, but the keeper of the gates herself is here tonight, too.—
Danielle Parker,
CBS News,
8 Mar. 2026
Noun
-
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
-
Police had taped off several square blocks around Sixth Street, while local police and federal agents, including ATF agents were at the site, according to Austin police serving as sentries.—
ABC News,
ABC News,
1 Mar. 2026
Cite this Entry
“Sentinel.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/sentinel. Accessed 12 Mar. 2026.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
