A sentinel is a guard, a lookout, a person keeping watch. It's often a soldier, but not always. If you're watching a pot, waiting for it to boil, you're standing sentinel over it and incidentally, it won't boil until you leave.
One who watches or guards; specifically
Noun
a person employed to watch for something to happen
n.
One who watches or guards; specifically (Mil.), a soldier
set to guard an army, camp, or other place, from surprise, to observe
the approach of danger, and give notice of it; a sentry.
n.
Watch; guard.
n.
A marine crab (Podophthalmus vigil) native of the Indian
Ocean, remarkable for the great length of its eyestalks; -- called also
sentinel crab.
v. t.
To watch over like a sentinel.
v. t.
To furnish with a sentinel; to place under the guard
of a sentinel or sentinels.
Sentinel
The sentinels who paced the ramparts.2.
Sentinel
One who watches or guards; specifically
To watch over like a sentinel.
Usage Examples
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