From WordNet (r) 3.0 (2006) [wn]:
Australian
adj 1: of or relating to or characteristic of Australia or its
inhabitants or its languages; "Australian deserts";
"Australian aborigines"
n 1: a native or inhabitant of Australia [syn: Australian,
Aussie]
2: the Austronesian languages spoken by Australian aborigines
[syn: Australian, Aboriginal Australian]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Australian \Aus*tra"li*an\, a. [From L. Terra Australis southern
land.]
Of or pertaining to Australia. -- n. A native or an
inhabitant of Australia.
[1913 Webster]