To praise, or express approval for something or someone.
To express approval (of something) by clapping the hands.
To condemn or express contempt (for someone or something) by hissing.
To call someone by hissing.
To utter (something) with a hissing sound.
To make a hissing sound.
To whisper, especially angrily or urgently.
To emit or eject (something) with a hissing sound.
To move with a hissing sound.
A sibilant sound, such as that made by a snake or escaping steam; an unvoiced fricative.
An expression of disapproval made using such a sound.