Gregorian chant
noun
the plain song or cantus firmus used in the ritual of the Roman Catholic Church.
a melody in this style.
British Dictionary definitions for gregorian chant
Cultural definitions for gregorian chant
Gregorian chant
The traditional music for Latin texts in the worship of the Roman Catholic Church. Gregorian chant is marked by performance in unison and by free-flowing rhythms that follow the phrasing of the text. The chants often call for one syllable to be sung across several notes.