/ Dictionary / Index A Alfonso I: Meaning and Definition of Find definitions for: Alfonso I Pronunciation: [key] (Alfonso Henriques), 1109?–85, first king of Portugal 1139–85. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. alfisol Alfonso X Related Content Daily Word Quiz: loathe Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language