sentinel
noun
a person or thing that watches or stands as if watching.
sentinels
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
“We stand on the walls, sentinels of the inner sanctum, against the assault of AI slop. The Ontology is based firmly in reality—there is, here, a dialectic between ground truth, tribal knowledge, and enhancements.”
From The Wall Street Journal ● May 5, 2026
“We stand on the walls, sentinels of the inner sanctum, against the assault of AI slop,” Karp said in his letter to shareholders.
From Barron's ● May 4, 2026
"Since dolphins are considered environmental sentinels for toxic exposures in marine environments," Dr. David Davis at the Miller School of Medicine explains, "there are concerns about human health issues associated with cyanobacterial blooms."
From Science Daily ● Oct. 11, 2025
“The workers, the cats, and the bulk milk samples are the best sentinels for early dairy herd diagnoses,” he said.
From Los Angeles Times ● Feb. 21, 2025
He had looked up and there they Were, standing like sentinels among the stars on their pillars.
From "The Thief Lord" by Cornelia Funke
