Definition of sentry in English:

sentry

Line breaks: sen¦try
Pronunciation: /ˈsɛntri
 
/

noun (plural sentries)

  • A soldier stationed to keep guard or to control access to a place: sentries patrolled the border [as modifier]: on sentry duty [mass noun]: two men stood sentry on the door every evening
    More example sentences
    • A lone sentry now stands guard, posted by the Northern Alliance.
    • First, a sentry need no longer be a soldier standing at the entrance to a camp with a pike, or a rifle.
    • By acting as sentries, patrolling the countryside etc. they relieved the army to do other work.
    Synonyms
    guard, sentinel, lookout, watch, watchman, patrol, picket
    historical vedette

Phrases

stand sentry

Keep guard or control access to a place.
More example sentences
  • Because of security woes, classes began two weeks late this year, with armed guards standing sentry at school gates.
  • The number of security guards patrolling its eastern borders exceeds those standing sentry on the closely watched border between the US and Mexico.
  • Relaxed Chinese guards armed with automatic rifles were standing sentry at the 217-meter-long bridge.

Origin

early 17th century: perhaps from obsolete centrinel, variant of sentinel.

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Pronunciation: ˌkɒlərəˈtjʊərə
noun
elaborate ornamentation of a vocal melody