Chi has several meanings and pronounciations. Among them are:
- A common romanization for qi (traditional chinese:氣;simplified chinese:气;pin-yin:qi;Wade-Giles:ch'i), a fundemental concept of chinese culture, meaning "air", but also a basic inert matter-particle, the building block , and the life force within everything. Chi is reffered to in martial arts as well as Traditional Chinese medicine.
- a Chi (Greek letter) letter of the Greek alphabet
- a traditional Chinese unit of length, equivalent to 333mm
- an alternative spelling of Qi, the Taoist fifth force
- an Italian magazine (Chi means Who).
- Chi, Wade-Giles for the Pinyin Jì (冀), an abbreviation for the Chinese province of Hebei.
- Chi, Wade-Giles for the Pinyin Jí (吉), an abbreviation for the Chinese province of Jilin
- Chi (Chii), a character in the anime and manga Chobits.
'CHI' is also an acronym for 'Computer-human interaction' (or Human-computer_interaction).