/ Dictionary / Index C closed shelf: Meaning and Definition of Find definitions for: closed' shelf' Pronunciation: [key] — Library Science. Library Science. a library stack with access restricted to the staff of the library or to a limited group of library users. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. closed set closed shell Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language