澳洲 - Wiktionary, the free dictionary

From 澳 (Ào, abbreviation of 澳大利亞／澳大利亚 (Àodàlìyà), from English Australia) + 洲 (zhōu, “continent”).

澳洲

1. Australia (A country in Oceania comprising the islands of Australia, Tasmania and other smaller islands in the Pacific Ocean, as well as a former colony in the British Empire)

   低價讓中國商品在澳洲的市場打開局面。 [MSC, trad.]
   低价让中国商品在澳洲的市场打开局面。 [MSC, simp.]

   Dījià ràng Zhōngguó shāngpǐn zài Àozhōu de shìchǎng dǎkāi júmiàn. [Pinyin]

   The low price of China's goods allows them to break into the Australian market.

   • 澳洲之西澳、南澳兩省，限能解英語五十句以上者，乃可登陸。 [MSC, trad.]
     澳洲之西澳、南澳两省，限能解英语五十句以上者，乃可登陆。 [MSC, simp.]

     Àozhōu zhī Xī'ào, Nán'ào liǎng shěng, xiàn néng jiě yīngyǔ wǔshí jù yǐshàng zhě, nǎi kě dēnglù. [Pinyin]

     In Western Australia and South Australia, entry is limited to those who can understand more than fifty sentences in English.

   • 澳洲週日（26日）通報有10人死於2019冠狀病毒病，創疫情爆發創單日死亡數字新高。 [MSC, trad.]
     澳洲周日（26日）通报有10人死于2019冠状病毒病，创疫情爆发创单日死亡数字新高。 [MSC, simp.]

     From: 2020 July 27, 《澳 10 人冠病死 單日新高》, in Harian Indonesia, page A5

     Àozhōu zhōurì (26 rì) tōngbào yǒu 10 rén sǐ yú 2019guānzhuàngbìngdúbìng, chuàng yìqíng bàofā chuàng dānrì sǐwáng shùzì xīngāo. [Pinyin]

     Australia reported on Sunday (26th) that 10 people died from COVID-19, marking a new single-day high since the outbreak of the pandemic.

2. (geology) Australia (a continent consisting of the islands of Australia, New Guinea and intervening islands)
3. (dated) Oceania

While 澳洲 (Àozhōu) is commonly used in Taiwan, Hong Kong and overseas Chinese communities to denote Australia, it is not always understood in mainland China, or is misunderstood as Oceania. To avoid confusion, the standard term 澳大利亞／澳大利亚 (Àodàlìyà) can be used.

• (Australia): 澳大利亞／澳大利亚 (Àodàlìyà); (Taishanese, dated) 新金山
• (Oceania): 大洋洲 (Dàyángzhōu), 海洋洲 (Hǎiyángzhōu)