See also: hyperionian English Etymology From Hyperion + -ian. Pronunciation IPA(key): /ˌhɪpəraɪˈoʊniən/, /ˌhaɪpər-/ Adjective Hyperionian (not comparable) (mythology) Of or relating to the Titan Hyperion in Greek mythology. (astronomy) Of or relating to the Saturnian moon named for Hyperion.Wikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads