sen·​try | \ ˈsen-trē How to pronounce sentry (audio) \
plural sentries

Definition of sentry

: guard, watch especially : a soldier standing guard at a point of passage (such as a gate)

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Examples of sentry in a Sentence

The general placed an armed sentry at the bridge. a sentry posted to watch for intruders
Recent Examples on the Web Police and armored vehicles stood sentry on the vast surface the square. Fox News, "China marks Tiananmen anniversary with crackdown, ban on Hong Kong vigil," 4 June 2020 Opie swatted at the glass, while Karma sat upright, a vigilant sentry. New York Times, "Does Your Pet Really Need Cat TV or a Dog Playlist?," 2 Feb. 2020 Now the service is testing the Common Unmanned Surface Vehicle (CUSV) as an unmanned, autonomous sentry capable of protecting much bigger ships from interlopers. Kyle Mizokami, Popular Mechanics, "The U.S. Navy's New Robo-Boat Has No People, But It Does Have a Very Big Gun," 19 Feb. 2020 Launching a new chapter in the fast-moving cancer immunotherapy field, scientists have blended two cutting-edge approaches: CRISPR, which edits DNA, and T cell therapy, in which sentries of the immune system are exploited to destroy tumors. Jennifer Couzin-frankel, Science | AAAS, "Cutting-edge CRISPR gene editing appears safe in three cancer patients," 6 Feb. 2020 Michael Zehar-Bibeau, a drug addict and convert to Islam, shot and killed a Canadian sentry on duty at the National War Memorial before heading to Parliament, where he was killed in a shootout with security officers. Amanda Coletta, Washington Post, "Suspect in deadly Toronto van rampage to face court hearing; motive for attack remains unclear," 24 Apr. 2018 Esper’s made the comments about a need to stand sentry at Syria’s oil fields as another U.S. mission in the country was approaching its high-profile conclusion: a partnership with Syrian Kurdish militias to fight the Islamic State. Washington Post, "U.S. discussing proposal to leave troops around Syria’s oil fields, Pentagon says," 21 Oct. 2019 The crane stood sentry next to the construction of Candlestick Park, the stadium’s demolition and five Super Bowl titles in between. Peter Hartlaub,, "A love letter to Hunters Point crane, the most underrated Bay Area landmark," 8 Jan. 2020 Banks said the areas on the trails chosen to host the nighttime sentries are strategic and some are close to sites where notorious crimes occurred. Stephen Hudak,, "Orange County installs cameras on West Orange Trail and three others," 17 Oct. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'sentry.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of sentry

1608, in the meaning defined above

History and Etymology for sentry

perhaps from obsolete sentry sanctuary, watchtower

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Time Traveler for sentry

Time Traveler

The first known use of sentry was in 1608

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Statistics for sentry

Last Updated

25 Jun 2020

Cite this Entry

“Sentry.” Dictionary, Merriam-Webster, Accessed 10 Jul. 2020.

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More Definitions for sentry


How to pronounce sentry (audio)

English Language Learners Definition of sentry

: a soldier who guards a door, gate, etc.


sen·​try | \ ˈsen-trē How to pronounce sentry (audio) \
plural sentries

Kids Definition of sentry

: a person (as a soldier) on duty as a guard

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More from Merriam-Webster on sentry

Thesaurus: All synonyms and antonyms for sentry

Rhyming Dictionary: Words that rhyme with sentry

Spanish Central: Translation of sentry

Nglish: Translation of sentry for Spanish Speakers

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