1. (noun)qi, chi, ch'i, ki the circulating life energy that in Chinese philosophy is thought to be inherent in all things; in traditional Chinese medicine the balance of negative and positive forms in the body is believed to be essential for good health Synonyms: qi, khi, ki, ch'i, chi
2. (noun)chi, khi the 22nd letter of the Greek alphabet Synonyms: qi, khi, chi, ch'i, ki