Definitions for sibilation
hiss, hissing, hushing, fizzle, sibilation(noun)
a fricative sound (especially as an expression of disapproval)
"the performers could not be heard over the hissing of the audience"
pronunciation with a sibilant (hissing or whistling) sound
A hissing sound.
Origin: sibilatio, from sibilare, present active infinitive of sibilo.
utterance with a hissing sound; also, the sound itself; a hiss