mallee /ˈmæli/ noun4 •(Australia) Any of several low-growing eucalypts characteristic of such scrubland, especially Eucalyptus dumosa, Eucalyptus oleosa, and Eucalyptus socialis.From the mallee and kurrajong trees came a rowdy chatter of parakeets, while queer soughing of air-currents came from the valley top. — 1931 •(Australia) A type of scrubland with low-growing thick eucalypts, characteristic of certain parts of Australia. •(Australia) Any semi-desert region of Australia where such scrub is the predominant vegetation.Although not totally destitute of animal life, in the summer season very few living creatures, beyond innumerable tribes of insects, are to be found within the Mallee. — 1867 •(Australia) The growth habit of certain eucalypt species that grow with multiple stems springing from an underground lignotuber, shared by species of related genera. formsmallees