SINCE 1828
chi
noun (1)
\ ˈkī
, ˈkē
\
, ˈkē
\
Definition of chi
(Entry 1 of 2)
: the 22nd letter of the Greek alphabet — see Alphabet Table
\ ˈchē
\
\
variants:
or ch'i
or less commonly qi
Definition of chi (Entry 2 of 2)
: vital energy that is held to animate the body internally and is of central importance in some Eastern systems of medical treatment (such as acupuncture) and of exercise or self-defense (such as tai chi)
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The first known use of chi was in the 15th century
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