1 [U] the waste gas that comes out of a vehicle, an engine or a machine (车辆、发动机、机器等排出的)废气:
car exhaust fumes/emissions汽车废气
2 [C] (also exhaust pipe (US 美) tailpipe) a pipe (particularly at the back of a car) through which waste gas escapes from an engine or machine 排气管(尤指汽车后面的)
☞picture at car 见car插图