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sentry

[sen-tree] /ˈsɛn tri/
noun, plural sentries.
1.
a soldier stationed at a place to stand guard and prevent the passage of unauthorized persons, watch for fires, etc., especially a sentinel stationed at a pass, gate, opening in a defense work, or the like.
2.
a member of a guard or watch.
Origin
1605-1615
1605-15; short for sentrinel, variant of sentinel
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for sentry
  • They take turns standing sentry over the town, barking to indicate whether danger looms or has subsided.
  • With such heavy demand for raiding, there aren't that many commandos free to perform sentry duty.
  • The only sign of human life is a sentry at the edge of town.
British Dictionary definitions for sentry

sentry

/ˈsɛntrɪ/
noun (pl) -tries
1.
a soldier who guards or prevents unauthorized access to a place, keeps watch for danger, etc
2.
the watch kept by a sentry
Word Origin
C17: perhaps shortened from obsolete centrinel, C16 variant of sentinel
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for sentry
n.

1610s, originally "watchtower;" perhaps a shortened variant of sentinel, which had a variant form centrinel (1590s); or perhaps worn down from sanctuary, on notion of "shelter for a watchman." Meaning "military guard posted around a camp" is first attested 1630s. Sentry-box is from 1728.

Online Etymology Dictionary, © 2010 Douglas Harper
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9
9
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