'Wallaby' definitions:

Definition of 'wallaby'

From: WordNet
noun
Any of various small or medium-sized kangaroos; often brightly colored [syn: wallaby, brush kangaroo]

Definition of 'Wallaby'

From: GCIDE
  • Wallaby \Wal"la*by\, n.; pl. Wallabies. [From a native name.] (Zool.) Any one of numerous species of kangaroos belonging to the genus Halmaturus, native of Australia and Tasmania, especially the smaller species, as the brush kangaroo (Halmaturus Bennettii) and the pademelon ({Halmaturus thetidis}). The wallabies chiefly inhabit the wooded district and bushy plains. [Written also wallabee, and whallabee.] [1913 Webster]