sibilation Meaning, Definition & Usage

  1. noun a fricative sound (especially as an expression of disapproval)
    hissing; hushing; fizzle; hiss.
    • the performers could not be heard over the hissing of the audience
  2. noun pronunciation with a sibilant (hissing or whistling) sound
    assibilation.

WordNet

Sib`i*la"tion noun
Etymology
L. sibilatio.
Definitions
  1. Utterance with a hissing sound; also, the sound itself; a hiss.
    He, with a long, low sibilation, stared. Tennyson.

Webster 1913