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
The previous study had shown that CLNP changed the behavior of dendritic cells, specialized immune cells that act as the immune system’s sentinels, initiating and regulating immune responses.
—
New Atlas, 6 Aug. 2025
There’s another important way that dogs can benefit the study of cancer—as environmental sentinels.
—Knowable Magazine, Smithsonian Magazine, 16 July 2025
Conservationists Annemarie van Doorn and Luke Playford watch over the region like sentinels.
—Angus Watson, CNN Money, 25 June 2025
On the second largest of the seven remote islands, historic Fort Jefferson stands like a sentinel over the sand.
—Kara Franker, Southern Living, 19 June 2025
See All Example Sentences for sentinel
New Atlas, 6 Aug. 2025
There’s another important way that dogs can benefit the study of cancer—as environmental sentinels.
—Knowable Magazine, Smithsonian Magazine, 16 July 2025
Conservationists Annemarie van Doorn and Luke Playford watch over the region like sentinels.
—Angus Watson, CNN Money, 25 June 2025
On the second largest of the seven remote islands, historic Fort Jefferson stands like a sentinel over the sand.
—Kara Franker, Southern Living, 19 June 2025
See All Example Sentences for sentinel
Recent Examples of Synonyms for sentinel
Noun
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At the center stands a bronze Caryatid by Louis Félix Chabaud, a classical guardian presiding over a resolutely modern space and anchoring the atrium from below.—
Erica Wertheim Zohar,
Forbes.com,
11 Sep. 2025
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The survivors watched in terror as their guardian was relieved of his suit.—
Manuel Muñoz,
Literary Hub,
11 Sep. 2025
Noun
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Her challengers have highlighted these controversies as evidence the city is due for a changing of the guard.—
Nick Sullivan,
Charlotte Observer,
10 Sep. 2025
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The castle itself is an enemy in its own right, shifting and breaking around the slayers to throw them off guard and keep them apart.—
David Opie,
IndieWire,
10 Sep. 2025
Noun
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The estate is custodian of all works and legacy of Tolkien published during his lifetime, and the joint custodian of works published after his death with the Christopher Tolkien Estate.—
Jesse Whittock,
Deadline,
10 Sep. 2025
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The United Arab Emirates, on the other hand, has provided significant support to the RSF, viewing its commander, Mohamed Hamdan Dagalo – widely known as Hemedti – as the custodian of Sudan’s gold exports and the path to its plans for port development along the Red Sea coast.—
Paul Tilsley,
FOXNews.com,
9 Sep. 2025
Noun
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Eventually, the warden showed up and welcomed them to el infierno—hell.—
Jonathan Blitzer,
New Yorker,
8 Sep. 2025
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As for the bear, two wardens with AGFC responded to the scene and found the animal still in the area.—
Kimberlee Speakman,
PEOPLE,
6 Sep. 2025
Noun
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Former Barcelona reserve keeper Jose Manuel Pinto became a hip hop artist and producer under the nickname Wahin.—
Guillermo Rai,
New York Times,
11 Sep. 2025
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The attack lasted 15 minutes before another keeper, identified as Phanom Sitsaeng, was able to reach Rangkharasamee, per Bangkok Post.—
Escher Walcott,
PEOPLE,
10 Sep. 2025
Noun
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Aside from scouting, sending messages or sentry duty, some dogs were trained for direct combat.—
Vic Verbalaitis,
MSNBC Newsweek,
22 Aug. 2025
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Rows of lights stood like sentries above, adorned with flat visors that guided the glow onto the action.—
Adithi Ramakrishnan,
Twin Cities,
21 Aug. 2025
Cite this Entry
“Sentinel.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/sentinel. Accessed 12 Sep. 2025.
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