See also: Appendix:Variations of "ki" English Etymology From 氣, 気. Noun kI or ki or KY (sometimes called ch'i) A term indicating intrinsic energy; usually associated with martial art – karate, judo, aikido, etc. – practitioners who consider ki important to performing at the highest level. Anagrams ik, Ik, IKWikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads