- 西北部 xīběibù northwestthe northwest part of a region or country
- 西北风 xīběifēng northwest winda wind blowing from the northwest, often used to refer to a cold winter wind
- 东南西北 dōngnánxīběi east, south, west and north; all directionsthe four cardinal directions; everywhere; in all directions
- 西北角 xīběijiǎo northwest corner
- 大西北 dàxīběi Northwest Chinathe vast region of Northwest China, comprising Shaanxi, Gansu, Ningxia, Qinghai, Xinjiang, and parts of western Inner Mongolia
- 西北大学 xīběidàxué Northwest UniversityNorthwest University (NWU), a public university in Xi'an, Shaanxi, China
- 喝西北风 hēxīběifēng to go hungryliterally "to drink the northwest wind"; to be too poor to buy food or have nothing to eat; to suffer from cold and hunger
- 西北工业大学 xīběigōngyèdàxué Northwestern Polytechnical UniversityNorthwestern Polytechnical University, a major public research university in Xi'an, China
- 西北农林科技大学 xīběinónglínkējìdàxué NWAFUNorthwest Agriculture and Forestry University
- 西北航空公司 xīběihángkōnggōngsī Northwest Airlines
- 东南西北中 dōngnánxīběizhōng the five directionsThe five directions: east, south, west, north, and middle.
- 嗑西北风 kèxīběifēng to have nothing to eatto live on air; to go hungry because one has no food or money
- 西北台 xīběitái Northwest TyphoonA specific type of typhoon in Taiwan that moves from the sea east of the island toward the northwest. Because these storms pass over the northeastern tip without being blocked by the Central Mountain Range, they maintain their strength and bring intense winds and heavy rain to northern and northwestern Taiwan, often causing floods and seawater backflow.
- 西北季风 xīběijìfēng northwest monsoona cold, dry seasonal wind from the northwest, characteristic of winters in East Asia when high pressure from Mongolia moves south
- 西北方 xīběifāng northwestthe northwest direction; northwestern region
- 西北联大 xīběiliándà Northwest Associated Universityprovisional university established by merger in Shaanxi province during the Second Sino-Japanese War
- 西北雨 xīběiyǔ thundershowerA sudden afternoon thundershower typical of Taiwan summers; it is characterized by being heavy, fast, and accompanied by lightning and thunder.