/ Dictionary / Index A Aga Khan IV: Meaning and Definition of Find definitions for: Aga Khan IV Pronunciation: [key] (Shah Karim al-Husainy) born 1936, leader of the Isma&ain;ili sect of Muslims in India since 1957 (grandson of Aga Khan III). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Aga Khan III agal Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language