ex|haust

ex|haust «ehg ZST», verb, noun.

–v.t.

1. to empty completely; drain: »

to exhaust an oil well.

SYNONYM(S): deplete.

2. to use up; expend: »

to exhaust one's money, exhaust the supply of water, exhaust one's strength.

SYNONYM(S): consume.

3. to tire very much: »

The climb up the hill exhausted us.

SYNONYM(S): fatigue.

4. to drain of strength or resources: »

to exhaust the soil. The long war exhausted the country.

5. to draw off: »

to exhaust the air in a jar.

6. to create a vacuum in.

7. to find out or say everything important about; explain fully: »

Her book about tulips exhausted the subject.

8. to deprive of ingredients by the use of solvents.

–v.i.

to be discharged; go forth: »

Gases from an automobile exhaust through a pipe.

–n.

1. the escape of used steam, spent gases, or fluid, from an engine or turbine.

2. a) the pipe or other means through which steam, spent gases, or fluid escape from an engine or turbine. b) the duct through which used air passes, especially in an air-conditioning system.

3. a) the used steam, spent gases, or fluid, that escape: »

The exhaust from an automobile engine is poisonous.

b) the hot gases emitted from the nozzle of a jet engine or rocket.

4. a) the production of an air current by the creation of a partial vacuum. b) an apparatus for this purpose, such as a fan or pump.

╂[< Latin exhaustus, past participle of exhaurīre draw out < ex- out, off + haurīre draw]

–ex|haust´er, noun.