To make or emit a sound like a prolonged enunciation of s, as a serpent or a goose; utter or send forth a long-drawn sibilation; hence, to emit any similar sound, as water thrown on hot metal, or as steam rushing through a small orifice; specifically (of persons), to express disapprobation or contempt by uttering such a sound.To whizz, as an arrow or other thing in rapid flight.To condemn or express disapproval of by hissing.n. A continued sound like that of s; a prolonged sibilation produced by the organs of utterance, or any similar sound: as, a serpent's hiss. It is a common expression of disapprobation or contempt.