(n) system consisting of the parts of an engine through which burned gases or steam are discharged
(n) gases ejected from an engine as waste products
(v) wear out completely; "This kind of work exhausts me"; "I'm beat"; "He was all washed up after the exam"
(v) create a vacuum in (a bulb, flask, reaction vessel, etc.)
(v) use up the whole supply of; "We have exhausted the food supplies"
(v) use up (resources or materials); "this car consumes a lot of gas"; "We exhausted our savings"; "They run through 20 bottles of wine a week"
(v) deplete; "exhaust one's savings"; "We quickly played out our strength"