Gregorian chant
noun /ɡrɪˌɡɔːriən ˈtʃɑːnt/
/ɡrɪˌɡɔːriən ˈtʃænt/
[uncountable, countable]- a type of church music for voices alone, used since the Middle AgesWord Originmid 18th cent.: named after St Gregory the Great (in Latin Gregorius), who is said to have standardized it.