The smallest continent; between the South Pacific and the Indian Ocean WordNet 3.0 & Open English WordNet

The continent of Australia, sometimes known in technical contexts by the names Sahul, Australia-New Guinea, Australinea, Meganesia, or Papualand to distinguish it from the country of Australia, is located within the Southern and Eastern Hemispheres. Wikipedia

Continent in the Earth's Southern Hemisphere Wikidata

Continent that is entirely located on the southern half of the globe, surrounded by the Indian, and Pacific Oceans, and Southern Ocean. OmegaWiki

The continent of Australia-New Guinea. New Guinea and the intervening islands are also on the Australian tectonic plate and are thus geologically considered part of the continent. Wiktionary

Continent of Australia. Wiktionary (translation)