Definitions for: Sibilation

[n] pronunciation with a sibilant (hissing or whistling) sound
[n] a fricative sound (especially as an expression of disapproval); "the performers could not be heard over the hissing of the audience"

Webster (1913) Definition: Sib`i*la"tion, n. [L. sibilatio.]
Utterance with a hissing sound; also, the sound itself; a
hiss.

He, with a long, low sibilation, stared. --Tennyson.

Synonyms: assibilation, hiss, hissing

See Also: noise, pronunciation