A plainsong form of liturgical music, named for Pope Gergory I (c. 540-604). It is sung by a choir or comprised of a choir and soloists, completely in monophonic form and without consistent meter. The chants were written in what are now called Church modes, and approximately 3,000 are known to have been composed. None of the known chants are identified by composer, and were probably written by priests and monks.
Gregorian Chant. (2012). In M. C. Thomsett, Musical terms, symbols, and theory: an illustrated dictionary. McFarland. Credo Reference: https://ezproxy.southern.edu/login?url=https://search.credoreference.com/content/entry/mcfmusic/gregorian_chant/0?institutionId=2258
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