The general placed an armed sentry at the bridge.
a sentry posted to watch for intruders
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Access to platforms was blocked off with bicycle-rack style barricades and roll-down gates as MTA police officers stood sentry, directing people to alternative transportation.—Mirna Alsharif, NBC news, 16 May 2026 But a Marine sentry was spotted outside the West Wing most of the day Saturday, usually a sign the president is at work.—James Laporta, CBS News, 5 Apr. 2026 The soldiers would have stayed as sentries before and after the performance, symbolically guarding the legacy of Taiwan’s founder.—Timothy Nerozzi, The Washington Examiner, 13 Mar. 2026 Police had taped off several square blocks around Sixth Street, while local police and federal authorities, including Bureau of Alcohol, Tobacco, Firearms and Explosives agents, were at the site, according to Austin police officers serving as sentries.—Jack Myer, Los Angeles Times, 1 Mar. 2026 See All Example Sentences for sentry
Word History
Etymology
perhaps from obsolete sentry sanctuary, watchtower