Definition of Australasia noun from the Oxford Advanced American Dictionary

 

Australasia

 noun
noun
NAmE//ˌɔstrəˈleɪʒə//
 
[singular]
 
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the region consisting of Australia, New Zealand, New Guinea, and the islands of the south-western Pacific Ocean
Australasian
 
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NAmE//ˌɔstrəˈleɪʒn//
 
adjective

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