Rib·ben·trop 
(rĭbən-trŏp′, -trôp′), Joachim von 1893-1946.
(rĭbən-trŏp′, -trôp′), Joachim von 1893-1946. German diplomat who as minister of foreign affairs (1938-1945) helped negotiate the German-Soviet Nonaggression Pact of 1939. He was convicted of war crimes at Nuremberg and hanged.