澳

abbr. for Macao 澳門|澳门 / abbr. for Australia 澳大利亞|澳大利亚

deep bay / cove / harbor

Austria / Austrian / abbr. for 奧地利|奥地利[Ao4 di4 li4] / Olympic / Olympics / abbr. for 奧林匹克|奥林匹克[Ao4 lin2 pi3 ke4]

obscure / mysterious

"water" radical in Chinese characters (Kangxi radical 85), occurring in 沒|没[mei2], 法[fa3], 流[liu2] etc / see also 三點水|三点水[san1 dian3 shui3]

China-Australia (relations)

Nanfang-ao Port in Yilan County 宜蘭縣|宜兰县[Yi2 lan2 Xian4], Taiwan

Nan'ao County in Shantou 汕頭|汕头[Shan4 tou2], Guangdong / Nan'ao Township in Yilan County 宜蘭縣|宜兰县[Yi2 lan2 Xian4], Taiwan / abbr. for 南澳大利亞州|南澳大利亚州[Nan2 ao4 da4 li4 ya4 zhou1], South Australia

South Australia, Australian state

Nan'ao Island in Shantou 汕頭|汕头[Shan4 tou2], Guangdong

Nan'ao County in Shantou 汕頭|汕头[Shan4 tou2], Guangdong

Nan'ao Township in Yilan County 宜蘭縣|宜兰县[Yi2 lan2 Xian4], Taiwan

Hong Kong and Macao Affairs Office of the State Council

Australia (slang term reflecting a perception of Australia as something of a backwater)

Hong Kong 香港[Xiang1 gang3] and Macao 澳門|澳门[Ao4 men2]

Provisional Municipal Council of Macau / Câmara Municipal de Macau Provisória