| 京口 | Jīng kǒu | Jingkou district of Zhenjiang city 镇江市, Jiangsu |
| 一口咬定 | yī kǒu yǎo dìng | to arbitrarily assert; to allege; to stick to one's statement; to cling to one's view |
| 口琴 | kǒu qín | harmonica |
| 插口 | chā kǒu | socket (for electric plug) |
| 龙口 | Lóng kǒu | Longkou county level city in Yantai 烟台, Shandong |
| 口试 | kǒu shì | oral examination; oral test |
| 有口无心 | yǒu kǒu wú xīn | (saying) to speak harshly but without any bad intent |
| 一口气儿 | yī kǒu qìr | erhua variant of 一口气 |
| 三人口气 | sān rén kǒu qì | third person (grammar) |
| 三岔口 | sān chà kǒu | At The Crossroads, the name of a famous opera, story from Shui Hu Zhuan |
| 上口齿 | shàng kǒu chǐ | supraoral tooth |
| 上海振华港口机械 | Shàng hǎi Zhèn huá Gǎng kǒu Jī xiè | Shanghai Zhenhua Port Machinery Company |
| 不冻港口 | bù dòng gǎng kǒu | ice-free port (refers to Vladivostok) |
| 并口 | bìng kǒu | parallel port (computing) |
| 并行口 | bìng xíng kǒu | parallel port (computing) |
中国精密机械进出
口公司 | zhōng guó jīng mì jī xiè jìn chū kǒu gōng sī | China Precision Machinery Import-Export Corporation (CPMIEC) |
中国航天技术进出
口公司 | zhōng guó háng tiān jì shù jìn chū kǒu gōng sī | China National Aero-Technology Import-Export Corporation (CATIC) |
| 中国进出口银行 | Zhōng guó Jìn chū kǒu Yín háng | The Export-Import Bank of China (state owned bank) |
| 串口 | chuàn kǒu | serial port (computing) |
| 串行口 | chuàn xíng kǒu | serial port (computing) |
| 丹江口 | Dān jiāng kǒu | Danjiangkou county level city in Shiyan 十堰, Hubei |
| 丹江口市 | Dān jiāng kǒu shì | Danjiangkou county level city in Shiyan 十堰, Hubei |
| 乃堆拉山口 | Nǎi duī lā shān kǒu | Nathu La (Himalayan pass on Silk Road between Tibet and Indian Sikkim) |
| 五口通商 | wǔ kǒu tōng shāng | the five treaty ports forced on Qing China by the 1842 treaty of Nanjing 南京条约 that concluded the First Opium War, namely: Guangzhou 广州, Fuzhou 福州, Ningbo 宁波, Xiamen or Amoy 厦门 and Shanghai 上海 |
| 五道口 | Wǔ dào kǒu | Wudaokou neighborhood of Beijing |
| 交叉口 | jiāo chā kǒu | (road) intersection |
| 交口 | Jiāo kǒu | Jiaokou county in Lüliang 吕梁[Lu:3 liang2], Shanxi 山西 |
| 交口称誉 | jiāo kǒu chēng yù | voices unanimous in praise (idiom); with an extensive public reputation |
| 交口县 | Jiāo kǒu xiàn | Jiaokou county in Lüliang 吕梁[Lu:3 liang2], Shanxi 山西 |
| 京口区 | Jīng kǒu qū | Jingkou district of Zhenjiang city 镇江市, Jiangsu |
| 人口学 | rén kǒu xué | demography |
| 人口密度 | rén kǒu mì dù | population density |
| 人口数 | rén kǒu shù | population |
| 人口普查 | rén kǒu pǔ chá | census |
| 人口稠密 | rén kǒu chóu mì | populous |
| 人口统计学 | rén kǒu tǒng jì xué | population studies; population statistics |
| 人口调查 | rén kǒu diào chá | census |
| 人口贩运 | rén kǒu fàn yùn | trafficking in persons; human trafficking |
| 以免借口 | yǐ miǎn jiè kǒu | to remove sth that could be used as a pretext (idiom) |
| 以太网络端口 | yǐ tài wǎng luò duān kǒu | Ethernet port |
| 布囊其口 | bù náng qí kǒu | lit. to cover sb's mouth with cloth; to gag; fig. to silence |
| 低领口 | dī lǐng kǒu | low-cut neckline |
| 佛口蛇心 | fó kǒu shé xīn | words of a Buddha, heart of a snake (idiom); two-faced; malicious and duplicitous |
| 俗谚口碑 | sú yàn kǒu bēi | common sayings (idiom); widely circulated proverbs |
| 信口开河 | xìn kǒu kāi hé | to talk off the cuff (idiom); idle talk |
| 信口雌黄 | xìn kǒu cí huáng | to talk off the cuff (idiom); idle talk |
| 倒抽一口气 | dào chōu yī kǒu qì | to gasp (in surprise, dismay, fright etc) |
| 倒抽了一口气 | dào chōu le yī kǒu qì | to gasp (in surprise, dismay, fright etc) |
| 倒胃口 | dǎo wèi kǒu | to spoil one's appetite; fig. to get fed up with sth |
| 光纤分布数据接口 | guāng xiān fēn bù shù jù jiē kǒu | FDDI; Fiber Distributed Data Interface |
