De Klerk, F.W. /də ˈklɜːk $ -ˈklɜːrk/ BrE AmE
(1936–) the President of South Africa from 1989 to 1994. He made many political changes and finally ended the system of ↑ apartheid . In 1990 he allowed the ↑ ANC to become a legal organization again, and let Nelson ↑ Mandela out of prison. He and Mandela won the Nobel Peace Prize in 1993.