Usually means: Guard or watchman; keeps vigil.
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We found 29 dictionaries that define the word SENTRY:

General (26 matching dictionaries)
  1. sentry: Longman Dictionary of Contemporary English
  2. sentry: Merriam-Webster
  3. sentry: Oxford Learner's Dictionaries
  4. sentry: American Heritage Dictionary of the English Language
  5. sentry: Collins English Dictionary
  6. sentry: Vocabulary.com
  7. Sentry, sentry: Wordnik
  8. sentry: Cambridge Advanced Learner's Dictionary
  9. sentry: Wiktionary
  10. sentry: Webster's New World College Dictionary, 4th Ed.
  11. sentry: The Wordsmyth English Dictionary-Thesaurus
  12. sentry: Infoplease Dictionary
  13. sentry: Dictionary.com
  14. sentry: Online Etymology Dictionary
  15. sentry: Cambridge Essential American English Dictionary
  16. Sentry (AUV), Sentry (Curtis Elkins), Sentry (Kree), Sentry (Marvel Comics), Sentry (Robert Reynolds), Sentry (comics), Sentry (disambiguation), Sentry (monitoring system), Sentry, The Sentry (comics), The Sentry (painting), The Sentry: Wikipedia, the Free Encyclopedia
  17. Sentry: Online Plain Text English Dictionary
  18. sentry: Webster's Revised Unabridged, 1913 Edition
  19. sentry: Rhymezone
  20. Sentry: AllWords.com Multi-Lingual Dictionary
  21. sentry: Webster's 1828 Dictionary
  22. sentry: FreeDictionary.org
  23. sentry: Mnemonic Dictionary
  24. sentry: TheFreeDictionary.com

Business (1 matching dictionary)
  1. sentry: Legal dictionary

Computing (1 matching dictionary)
  1. sentry: Encyclopedia

Slang (1 matching dictionary)
  1. sentry: Urban Dictionary

(Note: See sentries as well.)

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Definitions from Wiktionary (sentry)

▸ noun:  A guard, particularly on duty at the entrance to a military base.
▸ noun:  (uncountable) Sentry duty; time spent being a sentry.
▸ noun:  (nautical) A form of drag to be towed underwater, which on striking bottom is upset and rises to the surface.
▸ noun:  A watchtower.
▸ noun:  An animal like a marmot tasked with alerting the pack to danger.

Similar:
sentinel, scout, lookout man, lookout, picket, watch, centry, outsentry, sentry-go, guardsman, more...

Opposite:
deserter, defector, traitor

Types:
guard, watchman, watcher, lookout, patrol, more...

Phrases:
sentry duty, Sentry box, sentry boxes, stood sentry, standing sentry, more...

Adjectives:
german, armed, first, japanese, single, second, french, british, lone, young, marine

Colors:
    gunmetal,     olive drab,     midnight blue,     charcoal,     slate gray, more...


▸ Word origin

▸ Words similar to SENTRY

▸ Usage examples for SENTRY

▸ Idioms related to SENTRY

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▸ Popular adjectives describing SENTRY

▸ Words that often appear near SENTRY

▸ Rhymes of SENTRY

▸ Invented words related to SENTRY

Similar:
sentinel, scout, lookout man, lookout, picket, watch, centry, outsentry, sentry-go, guardsman, more...

Opposite:
deserter, defector, traitor

Types:
guard, watchman, watcher, lookout, patrol, more...

Phrases:
sentry duty, Sentry box, sentry boxes, stood sentry, standing sentry, stand sentry, sentry duties, stands sentry, sentry go, Boeing E-3 Sentry, Sentry gun, EADS HC-144 Ocean Sentry, Sentry Insurance, more...

Adjectives:
german, armed, first, japanese, single, second, french, british, lone, young, marine

Colors:
    gunmetal,     olive drab,     midnight blue,     charcoal,     slate gray, more...



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