/ Dictionary / Index S section mark: Meaning and Definition of Find definitions for: sec'tion mark" Pronunciation: [key] section (def. 16). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. section hand sector Related Content Daily Word Quiz: endear Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language