noun
Gregorian chant
Refers to the central tradition of Western plainchant, a form of monophonic, unaccompanied sacred song of the Roman Catholic Church.
修道院でグレゴリオ聖歌が響いていた。
Gregorian chant echoed through the monastery.
From Latin 'Gregorianus', referring to Pope Gregory I, traditionally credited with organizing the chant repertoire. The Japanese term is a direct borrowing and calque.