Exhaust /(?)/

Ex·haust

Exhaust

v. t.

imp. & p. p. Exhausted; p. pr. & vb. n. Exhausting

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.
To empty by drawing or letting out the contents; as, to exhaust a well, or a treasury.
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.
To bring out or develop completely; to discuss thoroughly; as, to exhaust a subject.
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. (Chem.)

Drained; exhausted; having expended or lost its energy.
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: the blast orifice or nozzle.
Exhaust pipe: the pipe that conveys exhaust steam from the cylinder to the atmosphere or to the condenser.
Exhaust port: the opening, in the cylinder or valve, by which the exhaust steam escapes.
Exhaust purifier: a machine for sorting grains, or purifying middlings by an exhaust draught.
Exhaust steam: steam which is allowed to escape from the cylinder after having been employed to produce motion of the piston.
Exhaust valve: a valve that lets exhaust steam escape out of a cylinder.

The steam let out of a cylinder after it has done its work there. (Steam Engine)
The foul air let out of a room through a register or pipe provided for the purpose.