/ Dictionary / Index L Lothair I: Meaning and Definition of Find definitions for: Lo•thair I Pronunciation: (lō-thâr', -târ'), [key] a.d. 795?–855, king of Germany 840–843; emperor of the Holy Roman Empire 840–855 (son of Louis I). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. loth Lothair II Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language