Yi or YI may refer to:
In Chinese philosophy, yin yang (; Chinese: 陰陽 yīnyáng, lit. "dark-bright", "negative-positive") describes how seemingly opposite or contrary forces may actually be complementary, interconnected, and interdependent in the natural world, and how they may give rise to each other as they interrelate to one another.
Yitzhak Rabin (Hebrew: יצחק רבין, IPA: [jitsˈχak ʁaˈbin] ( listen); 1 March 1922 – 4 November 1995) was an Israeli politician, statesman and general.
The yield point is the point on a stress–strain curve that indicates the limit of elastic behavior and the beginning of plastic behavior.
Yiddish words may be used in a primarily English language context. An English sentence that uses these words sometimes is said to be in Yinglish or Hebronics; however, the primary meaning of Yinglish is an anglicism used in Yiddish.
The Yi or Nuosuo people (historically known as Lolo) are an ethnic group in China, Vietnam, and Thailand.
Yingluck Shinawatra (Thai: ยิ่งลักษณ์ ชินวัตร, RTGS: Yinglak Chinnawat, pronounced [jîŋ.lák t͡ɕʰīn.nā.wát]; born 21 June 1967), nicknamed Pu (Thai: ปู, pronounced [pūː], meaning "crab"), is a Thai businesswoman and politician.