/ Dictionary / Index A Aga Khan: Meaning and Definition of Find definitions for: A•ga Khan Pronunciation: (ä'gu kän'), [key] — Islam. Islam. the divinely ordained head of the Isma&ain;ili branch of Shi&ain;ism. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. against Aga Khan III 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