Beacon

1. That which gives notice of danger.
2. A high hill near the shore.
3. A signal or conspicuous mark erected on an eminence near the shore, or moored in shoal water, as a guide to mariners.
4. To give light to, as a beacon; to light up; to illumine.
5. A signal fire to notify of the approach of an enemy, or to give any notice, commonly of warning.
6. To furnish with a beacon or beacons.