- hiss, hissing, sibilation - a fricative sound (especially as an expression of disapproval); "the performers could not be heard over the hissing of the audience"
--1 is a kind of noise
Derived form: verb sibilate4 - sibilation, assibilation - pronunciation with a sibilant (hissing or whistling) sound
--2 is a kind of pronunciation
Derived forms: verb sibilate1, verb sibilate2, verb sibilate3