Chi

CHI could mean:

Chile, the long and narrow South American nation between the Andes and the Pacific Ocean.
Chicago, the IATA city code for a major US city (sometimes informally written "Chi" or "Chi-town"). Additionally, most Chicago sports teams can be called "CHI" or "Chi" when citing scores, etc.
- Chicago Bears, a National Football League team
- Chicago Blackhawks, a National Hockey League team
- Chicago Bulls, a National Basketball Association team
- Chicago Cubs, a Major League Baseball team
- Chicago White Sox, a Major League Baseball team
Child Health International, a UK based charity for children's health (especially Cystic Fibrosis) in poor countries
Human-Computer Interaction, otherwise known as Computer-Human Interaction (CHI)
- CHI, an annual, international academic conference on the topic of Computer-Human Interaction
Chromosomal crossover, in homologous recombination, a viral DNA sequence called a "crossover hotspot instigator" (CHI)
CHI, Longwood University's, secret honorary society formed in 1900 in Farmville, Virginia
Closed Head Injury, meaning the skull is not broken.
Columbia Helicopters, Inc of Aurora, Oregon. Manufacturer and Operator of heavy lift helicopters
Chingford railway station, London; National Rail station code CHI

Chi could mean:

Chi, the Greek letter, Χ
- The Chi distribution, which is denoted by [math]\displaystyle{ \chi }[/math]
- The Chi-square distribution, which is denoted by [math]\displaystyle{ \chi ^2 }[/math]
Chi (kana), a letter used in the Japanese script Hiragana
Chi (magazine), an Italian magazine based in Milan
Chi Cheng (musician), Bassist for Deftones
Chi McBride, actor
Chi River in North-East Thailand
Chi, a fictional character in the anime/manga series Chobits
In Igbo mythology in Nigeria, Chi is a god or personification of an individual's fate
Chi is an alleged life force in every thing