- the monophonic and unmeasured ritual chant of the early Christian church, esp. Gregorian chant
- any similar religious chant, as in Hindu liturgies
Origin of plainsongtranslated, translation of Medieval Latin cantus planus
- Gregorian chant.
- Monophonic medieval liturgical music without strict meter and traditionally sung without accompaniment. In both senses also called plainchant.
Origin of plainsongTranslation of Medieval Latin cantus planus.