noun
a person from Australasia or something related to Australasia
adjective
relating to Australasia, which is a region that includes Australia, New Zealand, and nearby islands
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The Australasian region includes countries like Australia, New Zealand, and Papua New Guinea.
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I'm planning a trip to explore the Australasian countries next summer.
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Have you tried the Australasian cuisine yet? It's delicious!
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The company's expansion into the Australasian market opened up new opportunities for growth.