sentry

n. guard, sentinel, soldier or guard who is stationed at a passageway to prevent unauthorized entries or departures; watch, duty of a sentry

Sentry may refer to:A sentry is a guard at a gate or other point of passage. See General Orders for SentriesSentry (monitoring system) is an automatic near-Earth asteroid collision monitoring system.Sentry (comics) is the codename of four unrelated fictional characters of the Marvel Universe, of which the most prominent one is Robert Reynolds.Sentry Foods is a chain of grocery stores in Wisconsin, United States.Sentry Department Stores, a now-defunct chain of discount stores in Ontario, Canada.E-3 Sentry AWACS, airborne early warning aircraft.Sentry Insurance is a Wisconsin based insurance companySentrySafe is a safe manufacturing company headquartered in Rochester, New York.
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Noun
1. a person employed to watch for something to happen
(synonym) lookout, lookout man, sentinel, watch, spotter, scout, picket
(hypernym) watchman, watcher, security guard

(n.)
Guard; watch, as by a sentinel.
  

(n.)
A soldier placed on guard; a sentinel.
  

To dream of a sentry, denotes that you will have kind protectors, and your life will be smoothly conducted.