v. & n.
v. 1 intr. (of a person, snake, goose, etc.) make a sharp sibilant sound, esp. as a sign of disapproval or derision (audience booed and hissed; the water hissed on the hotplate). 2 tr. express disapproval of (a person etc.) by hisses. 3 tr. whisper (a threat etc.) urgently or angrily ('Where's the door?' he hissed).
n. 1 a sharp sibilant sound as of the letter s. 2 Electronics unwanted interference at audio frequencies. hiss away (or down) drive off etc. by hisses. hiss off hiss (actors etc.) so that they leave the stage.
[ ME: imit. ]