Pronunciation: (ô-strāl'yu),[key] —n. 1. a continent SE of Asia, between the Indian and the Pacific oceans. 14,576,330; 2,948,366 sq. mi. (7,636,270 sq. km).
2. Commonwealth of, a member of the Commonwealth of Nations, consisting of the federated states and territories of Australia and Tasmania. 14,995,287; 2,974,581 sq. mi. (7,704,165 sq. km). Cap.: Canberra.