quokka /ˈkwɒkə/ noun1 •A cat-sized wallaby, Setonix brachyurus, of southwestern Australia.At least 673 quokkas were re-introduced from Rottnest Island to the Marsupial Research Station of the University of Western Australia (254 ha) at Jandakot from 1972 to 1988. — 2003 formsquokkas