Dictionary definition · hiss
noun
- a fricative sound (especially as an expression of disapproval)"the performers could not be heard over the hissing of the audience"
- a cry or noise made to express displeasure or contempt
verb
- make a sharp hissing sound, as if to show disapproval
- move with a whooshing sound
- express or utter with a hiss
- show displeasure, as after a performance or speech
Source: Open English WordNet (CC BY 4.0).