What is the meaning of hiss?

noun

• A fricative sound (especially as an expression of disapproval. )
  • usage: "the performers could not be heard over the hissing of the audience"
  • synonyms: hissing, hushing, fizzle, sibilation
• A cry or noise made to express displeasure or contempt.
  • synonyms: boo, hoot, Bronx cheer, raspberry, razzing, razz, snort, bird

verb

• Make a sharp hissing sound, as if to show disapproval.
  • synonyms: siss, sizz, sibilate
• Move with a whooshing sound.
  • synonyms: whoosh
• Express or utter with a hiss.
  • synonyms: sizz, siss, sibilate
• Show displeasure, as after a performance or speech.
  • synonyms: boo