/ Dictionary / Index P precious stone: Meaning and Definition of Find definitions for: pre'cious stone' Pronunciation: [key] a gem distinguished for its beauty and rarity, used in jewelry. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. precious opal precipice Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language