- 西南部 xīnánbù southwestsouthwest part; southwestern region
- 东西南北 dōngxīnánběi the four directionsthe four cardinal points of the compass; east, west, south, and north; all directions
- 西南角 xīnánjiǎo southwest corner
- 黔西南州 qiánxīnánzhōu Qianxinan Buyei and Miao Autonomous PrefectureQianxinan Buyei and Miao Autonomous Prefecture in [[贵州省|貴州省|gui4 zhou1 sheng3]] province
- 黔西南 qiánxīnán QianxinanQianxinan Buyei and Miao Autonomous Prefecture in [[贵州|貴州|gui4 zhou1]] province
- 西南夷 xīnányí Southwest Barbarians(historical) A collective name used in ancient China for various non-Han ethnic groups inhabiting what are now parts of Sichuan, Guizhou, Yunnan, and northern Southeast Asia.
- 黔西南布依族苗族自治州 qiánxīnánbùyīzúmiáozúzìzhìzhōu Qianxinan PrefectureQianxinan Buyei and Miao Autonomous Prefecture, located in [[贵州|貴州|gui4 zhou1]] province
- 西南亚 xīnányà Southwest AsiaSouthwest Asia; the region including countries like Afghanistan, Iran, Turkey, and those on the Arabian Peninsula
- 西南交通大学 xīnánjiāotōngdàxué Southwest Jiaotong UniversitySouthwest Jiaotong University; a public university in Chengdu, Sichuan, China
- 西南官话 xīnánguānhuà Southwestern MandarinSouthwestern Mandarin, a dialect group of Mandarin spoken primarily in southwestern China
- 西南栗耳凤鹛 xīnánlì'ěrfèngméi striated yuhina(bird species of China) striated yuhina (Yuhina castaniceps)
- 西南联大 xīnánliándà National Southwest Associated Universitytemporary coalition university formed by Peking, Tsinghua, and Nankai universities in Kunming during the Second Sino-Japanese War
- 西南冠纹柳莺 xīnánguānwénliǔyīng Blyth's leaf warbler(bird species of China) Blyth's leaf warbler (Phylloscopus reguloides)
- 西南中沙群岛 xīnánzhōngshāqúndǎo Xisha, Nansha, and Zhongsha IslandsThe collective name for the Xisha, Nansha, and Zhongsha Islands and their surrounding waters in the South China Sea, administered by Hainan province.
- 西南非 xīnánfēi South West AfricaFormer name of the territory now known as Namibia
- 国立西南联合大学 guólìxīnánliánhédàxué National Southwest Combined UniversityNational Southwest Combined University; a wartime union of Peking, Tsinghua, and Nankai Universities in Kunming between 1937 and 1945
- 向西南 xiàngxīnán southwestwardin a direction toward the southwest
- 西南大学 xīnándàxué Southwest UniversitySouthwest University, located in Chongqing; often abbreviated as [[西大|西大|xi1 da4]]
