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The Collaborative International Dictionary of English v.0.48 (gcide)

Exhaust \Ex*haust"\, a. [L. exhaustus, p. p.]
1. Drained; exhausted; having expended or lost its energy.
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2. Pertaining to steam, air, gas, etc., that is released from
the cylinder of an engine after having preformed its work.
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{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.
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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.
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2. To empty by drawing or letting out the contents; as, to
exhaust a well, or a treasury.
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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.
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A decrepit, exhausted old man at fifty-five.
--Motley.
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4. To bring out or develop completely; to discuss thoroughly;
as, to exhaust a subject.
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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.
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{Exhausted receiver}. (Physics) See under {Receiver}.

Syn: To spend; consume; tire out; weary.
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Exhaust \Ex*haust"\, n. (Steam Engine)
1. The steam let out of a cylinder after it has done its work
there.
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2. The foul air let out of a room through a register or pipe
provided for the purpose.
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