Definition: exhaust

Source: WordNet (r) 1.7

exhaust
     n 1: gases ejected from an engine as waste products [syn: exhaust
          fumes, fumes]
     2: system consisting of the parts of an engine through which
        burned gases or steam are discharged [syn: exhaust system]
     v 1: wear out completely; "This kind of work exhausts me"; "I'm
          beat"; "He was all washed up after the exam" [syn: wash
          up, beat, tucker, tucker out]
     2: use up, as of resources or materials; "this car consumes a
        lot of gas"; "We exhausted our savings"; "They run through
        20 bottles of wine a week" [syn: consume, eat up, use
        up, eat, deplete, run through, wipe out]
     3: deplete; "exhaust one's savings"; "We quickly played out our
        strength" [syn: run down, play out, sap, tire]
     4: use up the whole supply of; "We have exhausted the food
        supplies"
     5: create a vacuum in (a bulb, flask, reaction vessel, etc.)
        [syn: evacuate]

Source: Webster's Revised Unabridged Dictionary (1913)

Exhaust \Ex*haust"\, a. [L. exhaustus, p. p.]
   1. Drained; exhausted; having expended or lost its energy.

   2. Pertaining to steam, air, gas, etc., that is released from
      the cylinder of an engine after having preformed its work.

   Exhaust draught, a forced draught produced by drawing air
      through a place, as through a furnace, instead of blowing
      it through.

   Exhaust fan, a fan blower so arranged as to produce an
      exhaust draught, or to draw air or gas out of a place, as
      out of a room in ventilating it.

   Exhaust nozzle, Exhaust orifice (Steam Engine), the blast
      orifice or nozzle.

   Exhaust pipe (Steam Engine), the pipe that conveys exhaust
      steam from the cylinder to the atmosphere or to the
      condenser.

   Exhaust port (Steam Engine), the opening, in the cylinder
      or valve, by which the exhaust steam escapes.

   Exhaust purifier (Milling), a machine for sorting grains,
      or purifying middlings by an exhaust draught. --Knight.

   Exhaust steam (Steam Engine), steam which is allowed to
      escape from the cylinder after having been employed to
      produce motion of the piston.

   Exhaust valve (Steam Engine), a valve that lets exhaust
      steam escape out of a cylinder.

Exhaust \Ex*haust"\, v. t. [imp. & p. p. Exhausted; p. pr. &
   vb. n. Exhausting.] [L. exhaustus, p. p. of exhaurire; ex
   out + haurire, haustum, to draw, esp. water; perhaps akin to
   Icel. asua to sprinkle, pump.]
   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. (Chem.) 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.

   Exhausted receiver. (Physics) See under Receiver.

   Syn: To spend; consume; tire out; weary.

Exhaust \Ex*haust"\, n. (Steam Engine)
   1. The steam let out of a cylinder after it has done its work
      there.

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