/ Dictionary / Index S Styx: Meaning and Definition of Find definitions for: Styx Pronunciation: (stiks), [key] — n. Class. Myth. a river in the underworld, over which the souls of the dead were ferried by Charon, and by which the gods swore their most solemn oaths. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: styx (Thesaurus) stythe su- Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language