/ Dictionary / Index S synaesthesia: Meaning and Definition of Find definitions for: syn•aes•the•sia Pronunciation: (sin"is-thē'zhu, -zhē-u, -zē-u), [key] — n. synesthesia. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: synaesthesia (Thesaurus) synaeresis synagogue 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