Meaning of CHI in English

CHI

I. ˈkī, ˈkē noun

Etymology: Greek chei, chi

Date: 15th century

: the 22d letter of the Greek alphabet — see alphabet table

II. noun

or ch'i also qi ˈchē

Usage: often capitalized

Etymology: Chinese (Beijing) qì, literally, air, breath

Date: 1850

: vital energy that is held to animate the body internally and is of central importance in some Eastern systems of medical treatment (as acupuncture) and of exercise or self-defense (as tai chi)

Merriam-Webster's Collegiate English vocabulary.      Энциклопедический словарь английского языка Merriam Webster.