a sound like a long ‘s’; this sound used to show disapproval of sb 嘶嘶声；嘘声 the hiss of the air brakes 气闸的嘶嘶声 the snake’s hiss 蛇发出的嘶嘶声 The performance was met with boos and hisses. 演出换来一片倒彩声和嘘声。