Definition of: beacon

(bē′kən) noun
1. Any prominent object, as a pole, tower, flag, or the like, set on a shore, shoal, buoy, reef, or in a similar position, as a guide or warning to mariners or others.
2. Something that serves as a conspicuous warning or a guide.
3. A lighthouse.
4. Aeron. Any of various marker, signal light, or radio devices used to establish and plot flight courses. See RADIO BEACON.
—v.t.
1. To furnish with a beacon.
2. To light up (darkness, etc.).
3. To guide by a light or beacon.
—v.i.
4. To shine or serve as a beacon. [OE bēacen sign, signal. Related to BECKON.]