exhaust

verb

1. 1

   To draw or let out wholly; to drain completely.

   The water was exhausted out of the well.

   Moisture of the earth is exhausted by evaporation.

2. 2

   To empty by drawing or letting out the contents.

   to exhaust a well

   to exhaust a treasury

   It takes approximately 8 to 9 minutes to exhaust the tank of air and fill it with water.

3. 3

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

   My grandfather seemingly never exhausts his supply of bad jokes.

   to exhaust one's resources

   to exhaust all possibilities

   You're exhausting my patience.

4. 4

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

   The marathon exhausted me.

   It is a branch that climbs for 11½ miles into the picturesque Wealden hills until, apparently exhausted by the effort, it terminates a mile short of the village of Hawkhurst.

5. 5

   To discuss thoroughly or completely.

   That subject has already been exhausted.

6. 6

   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

7. 7

   To expel (as exhaust).

   Infections can be reduced further if outside air is exhausted after a single use, rather than re-circulated.

   They [the doors between two clean rooms] get connected, and then high-pressure air blasts out anything in between: all the outside atmosphere is exhausted by fresh, clean air.

8. 8

   To discharge or escape (as exhaust).

   Steam from both high pressure cylinders exhausts through the respective receiver pipes into cylinders.

   Figure 7.13e shows a 4/2 valve that normally has the pressure applied to output 4 while output 3 exhausts through the exhaust port. When activated, the pressure switches to output 3 while output 4 exhausts through the exhaust port.

noun

1. 1

   A system consisting of the parts of an engine through which burned gases or steam are discharged; see also exhaust system.

2. 2

   The steam let out of a cylinder after it has done its work there.

   A lovely crisp exhaust: a feeling of almost unlimited power combined with complete freedom of running: and, to crown it all, a most melodious and wholly American chime whistle—these were my immediate impressions as we stormed rapidly out of Göttingen, intent on winning back some of the lost time.

   Travellers over the London & North Western main line in bygone days will need no reminder of the pattering of cinders on the carriage roofs, the fountains of sparks from the chimneys at night and the distance from which the exhaust of approaching locomotives could be heard, due to the fierceness of their blast in such conditions.

3. 3

   The dirty air let out of a room through a register or pipe provided for the purpose.

   If successful, Edison and Ford—in 1914—would move society away from the[…]hazards of gasoline cars: air and water pollution, noise and noxiousness, constant coughing and the undeniable rise in cancers caused by smoke exhaust particulates.

4. 4

   An exhaust pipe, especially on a motor vehicle.

5. 5

   Exhaust gas.

adjective

1. 1

   obsoleteExhausted; used up.

Forms

plural

exhausts

past tense

exhausted

past participle

exhausted

present participle

exhausting

third person singular

exhausts