noun
- guards who keep watch, especially soldiers posted to observe and warn of danger
- things that serve as watchers or protectors
Usage: figurative
Examples
- The sentinels stood at their posts throughout the night.
- Two sentinels guarded the entrance to the military base.
- The ancient castle had sentinels positioned on every tower.
- The tall pine trees stood like sentinels along the mountain ridge.
- Electronic sentinels monitor the building’s security system.
- The lighthouse served as a sentinel for ships approaching the harbor.
- Armed sentinels patrolled the perimeter of the compound.