| 欧洲 | Ōu zhōu | Europe; European |
| 欧 | ōu | (used for transliteration); old variant of 讴; Europe; abbr. for 欧洲; surname Ou |
| 欧姆 | ōu mǔ | ohm |
| 欧文 | Ōu wén | Owen (name); Erwin (name) |
| 欧几里得 | Ōu jǐ lǐ dé | Euclid of Alexandria (c. 300 BC), Greek geometer and author Elements 几何原本 |
| 欧阳 | Ōu yáng | two-character surname Ouyang |
| 欧洲共同体 | Ōu zhōu Gòng tóng tǐ | European Community, old term for EU, European Union 欧盟 |
| 欧亚 | Ōu Yà | Asia and Europe; Eurasian (continent); same as 欧亚 |
| 欧亚大陆 | Ōu yà dà lù | Eurasia |
| 欧仁 | Ōu rén | Eugene (name) |
| 欧伯林 | Ōu bó lín | Oberlin |
| 欧佩克 | ōu pèi kè | OPEC; Organization of the Petroleum Exporting Countries |
| 欧元 | Ōu yuán | Euro (currency) |
| 欧元区 | Ōu yuán qū | Eurozone |
| 欧共体 | Ōu gòng tǐ | abbr. for 欧洲共同体, European Community (old term for the EU, European Union) |
| 欧分 | ōu fēn | Eurocent |
| 欧吉桑 | ōu jí sāng | uncle (Japanese loanword, respectful appellation for any older man) |
| 欧安组织 | Ōu ān zǔ zhī | Organization for Security and Cooperation in Europe (OSCE), abbr. for 欧洲安全与合作组织 |
| 欧宝 | Ōu bǎo | Opel (car brand) |
| 欧巴桑 | ōu ba sāng | aunt (Japanese loanword, respectful appellation for any older female) |
| 欧巴马 | Ōu bā mǎ | Taiwanese variant of 奥巴马, Barack Obama (1961-), US Democrat politician, Senator for Illinois from 2005, president from 2009 |
| 欧几里德 | Ōu jǐ lǐ dé | Euclid of Alexandria (c. 300 BC), Greek geometer and author of Elements 几何原本 |
| 欧式 | ōu shì | in the European style; Euclidean |
| 欧式几何 | ōu shì jǐ hé | Euclidean geometry |
| 欧式几何学 | ōu shì jǐ hé xué | Euclidean geometry |
| 欧拉 | Ōu lā | Leonhard Euler (1707-1783), Swiss mathematician |
| 欧文斯 | Ōu wén sī | Owens (name) |
| 欧柏林 | Ōu bó lín | Oberlin |
| 欧查果 | ōu chá guǒ | medlar |
| 欧氏 | Ōu shì | Euclid; abbr. for 欧几里得 |
| 欧氏几何学 | Ōu shì jǐ hé xué | Euclidean geometry |
| 欧泊 | ōu bó | opal (Sanskrit: upala) |
| 欧洲中央银行 | Ōu zhōu Zhōng yāng Yín háng | European Central Bank |
| 欧洲之星 | ōu zhōu zhī xīng | Eurostar (train line) |
| 欧洲人 | Ōu zhōu rén | European (person) |
| 欧洲共同市场 | Ōu zhōu gòng tóng shì chǎng | European common market (old term for EU, European Union) |
| 欧洲刑警组织 | Ōu zhōu xíng jǐng zǔ zhī | Europol (European Police Office) |
| 欧洲原子能联营 | ōu zhōu yuán zǐ néng lián yíng | Euratom |
| 欧洲大陆 | Ōu zhōu dà lù | continent of Europe |
欧洲安全和合作组
织 | Ōu zhōu ān quán hé hé zuò zǔ zhī | Organization for Security and Cooperation in Europe OCSE |
欧洲安全与合作组
织 | ōu zhōu ān quán yǔ hé zuò zǔ zhī | Organization for Security and Cooperation in Europe (OSCE) |
| 欧洲山杨 | Ōu zhōu shān yáng | European poplar (Populus tremula) |
| 欧洲杯 | Ōu zhōu bēi | European cup (e.g. soccer) |
| 欧洲核子中心 | Ōu zhōu hé zǐ zhōng xīn | European center for nuclear research CERN, at Geneva |
| 欧洲核子研究中心 | Ōu zhōu hé zǐ yán jiū zhōng xīn | European center for nuclear research CERN, at Geneva |
| 欧洲法院 | Ōu zhōu Fǎ yuàn | European Court of Justice |
| 欧洲理事会 | Ōu zhōu Lǐ shì huì | European Council |
| 欧洲联盟 | Ōu zhōu lián méng | European Union; EU |
| 欧洲自由贸易联盟 | Ōu zhōu Zì yóu Mào yì Lián méng | European Free Trade Association |
| 欧洲航天局 | Ōu zhōu Háng tiān jú | European Space Agency (ESA) |
