/ Dictionary / Index J Juan Carlos I: Meaning and Definition of Find definitions for: Juan Car•los I Pronunciation: (hwän kär'lôs), [key] (Juan Carlos Alfonso Victor María de Borbón y Borbón), born 1938, Spanish monarch, born in Italy: king since 1975. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Juana Díaz Juan de Fuca Related Content Daily Word Quiz: sequester Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language