'radio beacon' definitions:

Definition of 'radio beacon'

noun

A characteristic signal emitted by a transmitter used for navigation

noun

A radio station that broadcasts a directional signal for navigational purposes [syn: radio beacon, beacon]

From: GCIDE

Beacon \Bea"con\ (b[=e]"k'n), n. [OE. bekene, AS. be['a]cen, b[=e]cen; akin to OS. b[=o]kan, Fries. baken, beken, sign, signal, D. baak, OHG. bouhhan, G. bake; of unknown origin. Cf. Beckon.]
1. A signal fire to notify of the approach of an enemy, or to give any notice, commonly of warning. [1913 Webster]
No flaming beacons cast their blaze afar. --Gay. [1913 Webster]
2. A signal, such as that from a lighthouse, or a conspicuous mark erected on an eminence near the shore, or moored in shoal water, as a guide to mariners. [1913 Webster]
3. A high hill near the shore. [Prov. Eng.] [1913 Webster]
4. That which gives notice of danger. [1913 Webster]
Modest doubt is called The beacon of the wise. --Shak. [1913 Webster]
5. (Navigation) a radio transmitter which emits a characteristic signal indication its location, so that vehicles may determine their exact location by locating the beacon with a radio compass; -- also called {radio beacon}. [1913 Webster]
5. [fig.] that which provides guidance or inspiration; the Constitution has been a beacon for civil rights activists. [PJC]
Beacon fire, a signal fire. [1913 Webster]