The meaning of Sentry

verb

Watch over in order to protect or control.

Usage examples:

Two men were left to guard the stockade

noun

A person who keeps watch, especially a soldier or other person assigned to protect a person or to control access to a place.

Usage examples:

A security guard

noun

A person or group of people whose job is to protect a person, place, or thing from danger or attack, or to prevent a person such as a criminal from escaping

Usage examples:

Prison guards, security guards, post a guard there are guards posted (= standing and watching) at e…

noun

A place from which to keep watch or view the landscape.

Usage examples:

A fortified lookout tower

noun

A person whose job is to watch for someone or something to appear

Usage examples:

Assign someone to be a lookout on the boat to keep an eye out for rocks., what kinds of behavior sh…

noun

An expedition to keep watch over an area, especially by guards or police walking or driving around at regular intervals.

Usage examples:

We were ordered to investigate on a night patrol

verb

Keep watch over (an area) by regularly walking or travelling around it.

Usage examples:

The garrison had to patrol the streets to maintain order

verb

Moving around an area to monitor and provide security

noun

A person or group of people who stand outside a workplace or other venue as a protest or to try to persuade others not to enter during a strike.

Usage examples:

Forty pickets were arrested

verb

Act as a picket outside (a workplace or other venue).

Usage examples:

Strikers picketed the newspaper's main building

verb

A wooden strip forming part of a fence

noun

A soldier or guard whose job is to stand and keep watch.

Usage examples:

Soldiers stood sentinel with their muskets

verb

Station a soldier or guard by (a place) to keep watch.

Usage examples:

A wide course had been roped off and sentinelled with police

noun

A mounted sentry positioned beyond an army's outposts to observe the movements of the enemy.

Usage examples:

For many of the campaigns of history sentries, or larger security parties constituting infantry pic…

verb

Look at or observe attentively over a period of time.

Usage examples:

Lucy watched him go

noun

A small timepiece worn typically on a strap on one's wrist.

Usage examples:

My watch had stopped

verb

Look attentively

noun

A man employed to look after an empty building, especially at night.

Usage examples:

A night watchman