PharosPronunciation: /ˈfɛːrɒs/Definition of Pharos a lighthouse, often considered one of the Seven Wonders of the World, erected by Ptolemy II (308–246 bc) in circa 280 bc on the island of Pharos, off the coast of Alexandria. (as noun a pharos) a lighthouse or beacon to guide sailors. Pharos in other Oxford dictionaries Definition of Pharos in the US English dictionary