/ Dictionary / Index S symposiarch: Meaning and Definition of Find definitions for: sym•po•si•arch Pronunciation: (sim-pō'zē-ärk"), [key] — n. the president, director, or master of a symposium. a toastmaster. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: symposiarch (Thesaurus) symposiac symposiast Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language