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