Wei or WEI may refer to:

States

• Wey (state) (衛, 1040–209 BC), Wèi in pinyin, but spelled Wey to distinguish from the bigger Wèi of the Warring States

• Wei (state) (魏, 403–225 BC), one of the seven major states of the Warring States period

• Cao Wei (曹魏, 220–266), ruled North China during the Three Kingdoms period

• Ran Wei (冉魏, 350–352), short-lived Sixteen Kingdoms period state

• Northern Wei (北魏, 386–535), ruled North China during the Southern and Northern Dynasties, later split into:

• Western Wei (西魏, 535–557)

• Eastern Wei (東魏, 534–550)

• Zhai Wei (翟魏, 388–392), state of Dingling/Gaoche ethnicity in China

Places

• Wei River, a main tributary of the Yellow River

• Wei County, Handan (魏县), Hebei, China

• Wei County, Xingtai (威县), Hebei, China

People

• Wei (given name), different variations of Chinese given names

• Wei (surname), various Chinese surnames (魏, 衛, 尉, 蔿, 韋)

• Wei Wei (disambiguation)

Astronomy

One of three Chinese constellations:

• Wěi (), meaning Tail

• Wēi (), meaning Rooftop

• Wèi (), meaning Stomach

• Wèi (), the Chinese name for the star Delta Herculis

• Wei, a name sometimes used for Epsilon Scorpii, after the Tail constellation

Other uses

• WEi, a South Korean boy group

• Wei (rank), a company-grade officer in Chinese armed forces

• Wei (value token), a subunit of the Ether value token on the Ethereum blockchain

• Wau Ecology Institute, Wau, Papua New Guinea

• Web Environment Integrity, a Web API proposed by Google

• Windows Experience Index (WEI) score, a measure of the user-perceived performance of a computer running Microsoft Windows

• Weipa Airport (IATA code: WEI), Weipa, Queensland, Australia

• Wei Empire, a fictional state and planetary romance series of Yulia Latynina

See also

• Way (disambiguation)

• Wee (disambiguation)

• Wey (disambiguation)

• Whey (disambiguation)