DictionarybeaconGuiding or warning signal
noun / verb

beacon

BEE-kuhn/ˈbiːkən/

A conspicuous signal used to guide or warn.

The lighthouse shines as a beacon beside the rocky harbor entrance.

A coastal lighthouse shines a conspicuous beam across a rocky harbor entrance, providing a visible signal light beside the safe channel.
Etymology

Old English beacen covered both signs and lighthouses. A visible signal that helps people find their way provides the image behind the figurative sense of a source of guidance.

In context

Drachinifel46:55
… a fire Beacon was lit by the Watchers on the high Cliffs the signal was seen by another of the beacon networks some miles away …
The Spanish Armada - From its Origins to the Lizard (Part 1)

More examples

  • The school becomes a beacon of hope for the neighborhood.
  • Engineers install warning beacons along the runway.
  • The old account describes lights beaconing the ships toward shore.

Forms

beacon · beacons · beaconed · beaconing

Similar words

signal
Broader; may communicate information without guiding or warning.
guide
Can direct someone without being a conspicuous signal.