A simple or principal melody, as accompanied by a running melody or ‘descant’ (see descant, n.). Chiefly figurative and in figurative contexts. Now…

The foundation or substratum on which other parts are overlaid, or on which they rest for support or… Music. The plainsong or melody on which a…

As a mass noun: that aspect of musical composition which consists in the arrangement of single notes in expressive succession; the branch of…

The plain-song or canto-fermo in old church music; the melody or ‘air’ in any composition, now usually the highest part. Also attributive.

Music. See quot. 1879.

‘The simple unadorned melody of the ancient hymns and chants of the church’ (Grove); plain-song.

That part of a harmonized musical composition which predominates and gives it its character; the melody. Now rare.

see canto fermo, n.

A song or melody, especially ecclesiastical melody; also, the principal voice. Also attributive.

Plainchant.