/ Dictionary / Index O Otto II: Meaning and Definition of Find definitions for: Otto II Pronunciation: [key] a.d.955–983, emperor of the Holy Roman Empire 973–983 (son of Otto I). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Otto I Otto III Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language