» This article is about the musical term. See Antiphon (person) the orator of ancient Greece. An antiphon (Greek ἀντίφωνον, ἀντί "opposite" + φωνή "voice") is a response, usually sung in Gregorian chant, to a psalm or some other part of a religious service, such as at Vespers or at a Mass. This meaning gave rise to the 'antiphony', a call and response style of singing. . Definition A piece of music which is… (More on Antiphon)