/ Dictionary / Index S stress mark: Meaning and Definition of Find definitions for: stress' mark" Pronunciation: [key] a mark placed before, after, or over a syllable to indicate stress in pronunciation; accent mark. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. stressful stressor Related Content Daily Word Quiz: tactful Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language