/ Dictionary / Index S sulfonation: Meaning and Definition of Find definitions for: sul•fo•na•tion Pronunciation: (sul"fu-nā'shun), [key] — n. Chem. the process of attaching the sulfonic acid group, –SOH, directly to carbon in an organic compound. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sulfonate sulfone Related Content Daily Word Quiz: candid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language