/ Dictionary / Index H Hyperion: Meaning and Definition of Find definitions for: Hy•pe•ri•on Pronunciation: (hī-pēr'ē-un), [key] — n. a Titan, the father of Helios, Selene, and Eos. a natural satellite of the planet Saturn. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: hyperion (Thesaurus) hyperinsulinism hyperirritability Related Content Daily Word Quiz: loathe Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language