/ Dictionary / Index S shelf mark: Meaning and Definition of Find definitions for: shelf' mark" Pronunciation: [key] — Library Science. Library Science. a symbol indicating the location of a work on a shelf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. shelflist shelf paper 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