/ Dictionary / Index C Celestine II: Meaning and Definition of Find definitions for: Celestine II Pronunciation: [key] — (Guido di Castello), fl. 12th century, Italian ecclesiastic: pope 1143–44. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Celestine I Celestine III Related Content Daily Word Quiz: sumptuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language