/ Dictionary / Index S synesthesia: Meaning and Definition of Find definitions for: syn•es•the•sia Pronunciation: (sin"us-thē'zhu, -zhē-u, -zē-u), [key] — n. a sensation produced in one modality when a stimulus is applied to another modality, as when the hearing of a certain sound induces the visualization of a certain color. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: synesthesia (Thesaurus) synesis synfuel Related Content Daily Word Quiz: procrastinate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language