/ Dictionary / Index N Nicholas I: Meaning and Definition of Find definitions for: Nicholas I Pronunciation: [key] (“Nicholas the Great”), dieda.d.867, Italian ecclesiastic: pope 858–867. 1796–1855, czar of Russia 1825–55. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Nicholas Nicholas II Related Content Daily Word Quiz: fervor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language