01 n. A soldier placed on guard; a sentinel.
pl.
Sentires ((#))
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1.
A soldier placed on guard; a sentinel.(Mil.)
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2.
Guard; watch, as by a sentinel.“Here toils, and death, and death's half-brother, sleep, Forms terrible to view, their sentry keep.” — Dryden.
Phrases & compounds
Sentry box —
a small house or box to cover a sentinel at his post, and shelter him from the weather.