(noun) a group of notes or tones sung on one syllable in plainsong / (noun) melodic embellishment / (noun) cadenza
She pauses in the uneasy melismas of desert wind.
oooh pretty
It was a bit like mine (a guttural Liverpool k; some of the same distended vowels), but with a northeastern melisma that turned “module” into mod-joo-al, “sure” into shower.