Sentinel

A sentinel is a person who watches over a place to keep it safe, like a guard at a castle or a lookout on a ship. They help make sure everything is secure and alert others if something is wrong.

Examples

• The ancient castle had a stone sentinel standing tall at the entrance, watching over the land and reminding everyone of the brave knights who once protected it.
• During our camping trip, we spotted a tall tree that acted like a sentinel, keeping watch over our campsite while we roasted marshmallows and told stories around the fire.
• In our science project about animal behavior, we learned that some birds act as sentinels, alerting their flock to danger with loud calls when they see a predator approaching.

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