sentineled or sentinelled; sentineling or sentinelling
1
: to watch over as a sentinel
2
: to furnish with a sentinel
3
: to post as sentinel
Synonyms
Examples of sentinel in a Sentence
Noun
a lone sentinel kept watch over the fort
Recent Examples on the Web
Susanne Rust, Los Angeles Times, 22 Oct. 2024
But it’s had many lives: a residence for noble families, a Nazarene college, a sentinel of resilience that resisted Napoleonic invasions and endured the dark days of Nazi rule.
—Ann Abel, Forbes, 26 Sep. 2024
Bruce Y. Lee, Forbes, 17 Sep. 2024
Think delicate epiphytic orchids curling around the knobby trunks of waving palms; white clapboard cottages with shutters in shades of salmon, sunshine, and seafoam; and a stretch of private beach with a lighthouse sentinel on the horizon.
—Caroline Rogers, Southern Living, 30 June 2023
See all Example Sentences for sentinel 
Noun
Seems dolphins are one of the major biological sentinels of our plastic pollution.
—Susanne Rust, Los Angeles Times, 22 Oct. 2024
But it’s had many lives: a residence for noble families, a Nazarene college, a sentinel of resilience that resisted Napoleonic invasions and endured the dark days of Nazi rule.
—Ann Abel, Forbes, 26 Sep. 2024
Verb
While penicillin was a game-changer, microorganisms were able to quickly adapt developing mutations to neutralize the effects of this antibiotic, sort of like those robot sentinels in the movie X-Men: Days of Future Past.
—Bruce Y. Lee, Forbes, 17 Sep. 2024
Think delicate epiphytic orchids curling around the knobby trunks of waving palms; white clapboard cottages with shutters in shades of salmon, sunshine, and seafoam; and a stretch of private beach with a lighthouse sentinel on the horizon.
—Caroline Rogers, Southern Living, 30 June 2023
See all Example Sentences for sentinel
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'sentinel.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
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Cite this Entry
“Sentinel.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sentinel. Accessed 31 Oct. 2024.
Copy CitationMedical Definition
sentinel
adjective
sen·ti·nel
ˈsent-ᵊn-əl 
: being an individual or part of a population potentially susceptible to an infection or infestation that is being monitored for the appearance or recurrence of the causative pathogen or parasite
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