Mitch ‧ um, Rob ‧ ert /ˈmɪtʃəm, ˈrɒbət $ ˈrɑːbərt/ BrE AmE
(1917–97) a US film actor, who played leading parts in many films, especially ↑ western s and films about criminals, from the 1940s onwards. Among his best-known films are The Sundowners , Ryan’s Daughter , and The Big Sleep .