a continent SE of Asia, between the Indian and the Pacific oceans. 18,438,824; 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. 18,438,824; 2,974,581 sq. mi. (7,704,165 sq. km). Capital: Canberra.