mallee Syllabification: (mal·lee)Pronunciation: /ˈmalē/Definition of mallee noun a low-growing bushy Australian eucalyptus that typically has several slender stems. Genus Eucalyptus, family Myrtaceae: several species, in particular E. dumosa scrub that is dominated by mallee bushes, typical of some arid parts of Australia. Origin: mid 19th century: from Wuywurung (an Aboriginal language)mallee in other Oxford dictionaries Definition of mallee in the British & World English dictionary