exhaust

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]

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 (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]

English

Etymology

From exhaustus (past participle of exhaurire).

Pronunciation

\Ex*haust"\

• Rhymes: -ɔːst

Verb

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. 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.

Synonyms

• spend, consume, tire out, weary

Translations

• Finnish: ehdyttää (1,2), uuvuttaa (3), näännyttää (3)

Noun

1. System consisting of the parts of an engine through which burned gases or steam are discharged
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.
4. An exhaust pipe, especially on a motor vehicle.

Translations

• Dutch: uitlaatpijp (1), uitlaat (1,2,3)
• Finnish: pakokaasu (2,3), pakoputki (4)
• German: Auspuff (1,4)
• Greek: εξάτμιση (1,4)
• Spanish: tubo de escape (1)

Derived terms

• exhaust draught
• exhaust fan
• exhaustion
• exhaustless
• exhaust nozzle
• exhaust pipe
• exhaust port
• exhaust purifier
• exhaust steam
• exhaust valve

Exhaust may refer to:

In mathematics:

• Proof by exhaustion, proof by examining all individual cases
• Exhaustion by compact sets, in analysis, a sequence of compact sets that converges on a given set
• Collectively exhaustive, in probability and set theory, a collection of sets whose union equals the complete space
• Method of exhaustion, in geometry, finding the area of a shape by approximating it with polygons

In engines and technology:

• Exhaust gas, a gas which occurs as a result of combustion of fuel
• Exhaust system, a mechanism for venting exhaust gases from an internal combustion engine
• Exhaust velocity, a measure of engine efficiency
• Exhaust brake, a method of slowing diesel engines
• Exhaust manifold, a structure collecting an engine's exhaust outlets

In health:

• Heat exhaustion, a medical condition where the body is unable to control its accumulation of heat
• Nervous exhaustion, a nineteenth-century diagnosis encompassing fatigue, anxiety, and depression
• Adrenal exhaustion, a hypothesized maladaption of the adrenal glands

In law:

• Exhaustion of remedies, restrictions on opening a suit in a new court while the original suit is still continuing
• Exhaustion of rights, the loss of intellectual property rights

Exhaust may also refer to:

• Exhaustive ballot, a multi-round voting system
• Exhaust date, the projected date that a telecommunications area code will have assigned all of its numbers
• Exhaust (band) is a clarinet, drum, and tape trio in Montreal, Canada
• In the description of any formally defined set, the rules by which every arbitrary object may be defined as included in some subset n (and excluded from every other n-1 wholly independent subsets), with no objects remaining, are referred to as being exhaustive.

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