- (North American English) (British English silencer)
a device that is fixed to the exhaust of a vehicle in order to reduce the amount of noise that the engine makes （发动机的）消音器 
a device that is fitted to an instrument in order to reduce the amount of noise that it makes, or to a camera, a microphone, etc. to reduce the amount of noise coming from things that you do not want to record 消声器；减声器 - (old-fashioned)
a thick piece of cloth worn around the neck to keep you warm 围巾
