HesperianPronunciation: /hɛˈspɪərɪən/Definition of Hesperian adjective Greek Mythology of or concerning the Hesperides. literary western. Origin: late 15th century: from Latin hesperius (from Greek hesperios, from Hesperia 'land of the west', from hesperos 'western' (see Hesperus)) + -anHesperian in other Oxford dictionaries Definition of Hesperian in the US English dictionary