/ Dictionary / Index O open-stack: Meaning and Definition of Find definitions for: o•pen-stack Pronunciation: (ō'pun-stak'), [key] — adj. Library Science. having or being a system of library management in which patrons have direct access to stacks for browsing and selecting books; open-shelf. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. open space open stance Related Content Daily Word Quiz: pauper Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language