/ Dictionary / Index S Sion: Meaning and Definition of Find definitions for: Sion Pronunciation: (Fr. syôn), [key] — n. a town in and the capital of Valais, in SW Switzerland. 23,100. Si•on Pronunciation: (sī'un), [key] — n. Zion. -sion Pronunciation: [key] a noun suffix appearing in loanwords from Latin:Cf. compulsion. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: sion (Thesaurus) Sinus Sabaeus SIOP Related Content Daily Word Quiz: ounterfeit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language