melisma

A passage of multiple notes sung to one syllable of text, as in Gregorian chant.

In music: A song, melody, or air, as contrasted with a recitative or declamatory passage.

A melodic decoration, grace, fioritura, or roulade.

A cadenza.

A piece of melody; a song or tune, — as opposed to recitative or musical declamation.

A grace or embellishment.

A passage of several notes sung to one syllable of text, as in Gregorian chant.