The general placed an armed sentry at the bridge.
a sentry posted to watch for intruders
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The tree had long been a way marker and memory maker: a site of wedding proposals and remembrance ceremonies, a sentry in photos from one-in-a-lifetime family vacations, taped to fridges across the world.—Amelia Nierenberg, New York Times, 29 Apr. 2025 Anduril makes everything from small drones to sentry towers used to police the U.S.-Mexico border systems to enable pilotless vehicles.—William Hartung, Forbes, 26 Dec. 2024 Occasionally, gang members would come rushing in and that’s when auto sentry guns would be useful.—Gieson Cacho, Mercury News, 1 Apr. 2025 One such ancient story centers on the bronze sentry Talos.—Sofia Giannuzzi, Smithsonian Magazine, 22 Apr. 2025 See All Example Sentences for sentry
Word History
Etymology
perhaps from obsolete sentry sanctuary, watchtower
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