/ Dictionary / Index A Aga Khan III: Meaning and Definition of Find definitions for: Aga Khan III Pronunciation: [key] 1877–1957, leader of the Isma&ain;ili sect of Muslims in India 1885–1957. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Aga Khan Aga Khan IV 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