Australasia

[aw-struh-ley-zhuh, -shuh] /ˌɔ strəˈleɪ ʒə, -ʃə/
noun
1.
Australia, New Zealand, and neighboring islands in the S Pacific Ocean.
Origin
Austral(ia) + Asia
Related forms
Australasian, adjective, noun
British Dictionary definitions for Australasia

Australasia

/ˌɒstrəˈleɪzɪə/
noun
1.
Australia, New Zealand, and neighbouring islands in the S Pacific Ocean
2.
(loosely) the whole of Oceania