galacticEnglishOxford New American Dictionarygalactic /ɡəˈlaktik, ɡəˈlæktɪk / ▸ adjective relating to a galaxy or galaxies, especially the Milky Way galaxy: the search for a black hole at the galactic center. ▪ Astronomy measured relative to the galactic equator: the south galactic pole. – DERIVATIVES galactically – ORIGIN mid 19th century : from Greek galaktias (variant of galaxias ‘galaxy’) + -ic.