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From Latin exhaustus, past participle of exhaurire ‎(to draw out, drink up, empty, exhaust), from ex ‎(out) + haurire ‎(to draw (especially water), drain).



exhaust ‎(third-person singular simple present exhausts, present participle exhausting, simple past and past participle exhausted)

  1. To draw or let out wholly; to drain off completely; as, to exhaust the water of a well; the moisture of the earth is exhausted by evaporation.
  2. To empty by drawing or letting out the contents; as, to exhaust a well, or a treasury.
  3. To drain, metaphorically; to use or expend wholly, or till the supply comes to an end; to deprive wholly of strength; to use up; to weary or tire out; to wear out; as, to exhaust one's strength, patience, or resources.
    A decrepit, exhausted old man at fifty-five. --Motley.
  4. To bring out or develop completely; to discuss thoroughly; as, to exhaust a subject.
  5. (chemistry) To subject to the action of various solvents in order to remove all soluble substances or extractives; as, to exhaust a drug successively with water, alcohol, and ether.


Related terms[edit]



exhaust ‎(plural exhausts)

  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 foul air let out of a room through a register or pipe provided for the purpose.
    • 2006, Edwin Black, chapter 1, Internal Combustion[1]:
      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. An exhaust pipe, especially on a motor vehicle.
  5. Short for exhaust gas.


Derived terms[edit]


exhaust ‎(not comparable)

  1. (obsolete) Exhausted; used up.

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