A watch, guard, or lookout; the act of keeping watch or the person assigned to keep watch for danger or activity.
夜間は工場の見張りが交代で巡回する。
At night the factory guards take turns patrolling.
荷物置き場に見張りを立てて、盗難を防いだ。
We posted a lookout at the baggage area to prevent theft.
見張りの目があるので、彼らは不正をしにくい。
With eyes watching, it's harder for them to do anything dishonest.