noun

A beacon is a device or a signal that is used to guide or warn people, especially in case of danger or difficulty. It can emit light, sound, or other forms of radiation that can be seen or heard from a distance, and it is often placed in a high position or on a moving vehicle to maximize its visibility. Beacons are used for navigation, to mark the location of a rescue operation, to warn of hazardous conditions, or to guide ships and aircraft to their destinations.

Example

1. The lighthouse served as a beacon for ships navigating through the treacherous waters.
2. The distress beacon on the life raft activated, sending out a signal to the coast guard.
3. The airport runway was equipped with beacons to guide planes in for landing, even in poor visibility conditions.