Dictionary

hiss

Pronunciation: (his), [key]
—v.i.
1. to make or emit a sharp sound like that of the letter s prolonged, as a snake does, or as steam does when forced under pressure through a small opening.
2. to express disapproval or contempt by making this sound: The audience hissed when the actor forgot his lines.

—v.t.
1. to express disapproval of by hissing: The audience hissed the controversial play.
2. to silence or drive away by hissing (usually fol. by away, down, etc.): They hissed down the author when he tried to speak.
3. to utter with a hiss.

—n.
a hissing sound, esp. one made in disapproval.