1.gases ejected from an engine as waste products
2.system consisting of the parts of an engine through which burned gases or steam are discharged
1.wear out completely;
This kind of work exhausts me
2.use up (resources or materials);
this car consumes a lot of gas
3.deplete;
exhaust one's savings
4.use up the whole supply of;
We have exhausted the food supplies
5.create a vacuum in (a bulb, flask, reaction vessel, etc.)