Sentry
Pronunciation : Sen"try
Part of Speech : n.;
Etymology : [Probably from OF. senteret a little patch; cf. F. sentier path, and OF. sente. See Sentinel.]
Definition : 1. (Mil.)
Defn: A soldier placed on guard; a sentinel.
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. Sentry box, a small house or box to cover a sentinel at his post, and shelter him from the weather.
pl. Sentires.
Source : Webster's Unabridged Dictionary, 1913