Definition of "Exhaust" :

noun: system consisting of the parts of an engine through which burned gases or steam are discharged

noun: gases ejected from an engine as waste products

verb: wear out completely

"This kind of work exhausts me."

verb: eliminate (a substance)

"Combustion products are exhausted in the engine."

verb: use up the whole supply of

"We have exhausted the food supplies."

verb: use up (resources or materials)

"We exhausted our savings."

verb: deplete

"Exhaust one's savings."