- 1 a light that is placed somewhere to guide vehicles and warn them of danger a navigation beacon
- 2 beacon of/for something a person, principle, etc. that guides others or is a good model for them to follow He was a beacon of hope for the younger generation. America is a beacon for freedom.
- 3a radio station whose signal helps ships and aircraft to find their position The plane was guided in by radio beacon.
- 4(in the past) a fire lit on top of a hill as a signal