exhaust

1. A system consisting of the parts of an engine through which burned gases or steam are discharged; see also exhaust system.
2. The steam let out of a cylinder after it has done its work there.
3. The dirty air let out of a room through a register or pipe provided for the purpose.
4. An exhaust pipe, especially on a motor vehicle.
5. Exhaust gas.

1. To draw or let out wholly; to drain off completely

   Moisture of the earth is exhausted by evaporation.

2. To empty by drawing or letting out the contents

   to exhaust a treasury

3. To drain; to use up or expend wholly, or until the supply comes to an end

   I exhausted my strength walking up the hill.

4. To tire out; to wear out; to cause to be without any energy

   The marathon exhausted me.

5. To bring out or develop completely
6. To discuss thoroughly or completely

   That subject has already been fully exhausted.

7. To subject to the action of various solvents in order to remove all soluble substances or extractives

   to exhaust a drug successively with water, alcohol, and ether

adjective

Exhausted; used up.