Aga Khan IV n (Biography) Prince Karim (kəˈriːm). born 1936, spiritual leader of the Ismaili sect of Muslims from 1957 Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 20...