beacon /ˈbikən/ noun
1 a strong light that can be seen from far away and that is used to help guide ships, airplanes, etc.
2 a radio signal that is broadcast to help guide ships, airplanes, etc.
- a radio beacon
3 someone or something (such as a country) that guides or gives hope to others
- These countries are beacons of democracy.
- Our nation should be a beacon of/for peace to people around the world.
- This new medicine is a beacon of hope for/to thousands of people.