/ Dictionary / Index R rare book: Meaning and Definition of Find definitions for: rare' book' Pronunciation: [key] a book that is distinguished by its early printing date, its limited issue, the special character of the edition or binding, or its historical interest. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. rarebit rare earth Related Content Daily Word Quiz: nonchalant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language