Sentry has 2 different meanings across 1 category:
Noun
Noun
1
a person employed to keep watch for some anticipated event
"The security guard stood as a sentry at the entrance, ready to spot any intruders before they could breach the building."
2
A guard, particularly on duty at the entrance to a military base.
"The sentry stood rigidly by the iron gates of the base, scanning every vehicle that approached."
Related Terms
Broader Terms (hypernyms)