/ Dictionary / Index S sulfur spring: Meaning and Definition of Find definitions for: sul'fur spring" Pronunciation: [key] a spring the water of which contains naturally occurring sulfur compounds. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sulfur shelf sulfur trioxide 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