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beacon (n.)

Old English beacen "sign, portent, lighthouse," from West Germanic *baukna "beacon, signal" (source also of Old Frisian baken, Old Saxon bokan, Old High German bouhhan); probably from Proto-Germanic *baukna- "beacon, signal," from suffixed form of PIE root *bha- (1) "to shine." Figurative use from c. 1600.

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Definitions of beacon from WordNet
1
beacon (n.)
a fire (usually on a hill or tower) that can be seen from a distance;
Synonyms: beacon fire
beacon (n.)
a radio station that broadcasts a directional signal for navigational purposes;
Synonyms: radio beacon
beacon (n.)
a tower with a light that gives warning of shoals to passing ships;
Synonyms: lighthouse / beacon light / pharos
2
beacon (v.)
shine like a beacon;
beacon (v.)
guide with a beacon;
From wordnet.princeton.edu