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# Exhaust

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 or Hyperthermia, a medical condition where the body is unable to control its accumulation of heat
*Nervous exhaustion or Neurasthenia, a nineteenth-century diagnosis encompassing fatigue, anxiety, and depression

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

In other uses:
*Exhaust (band), a clarinet, drum, and tape trio in Montreal, Canada
*Exhaustive ballot, a multi-round voting system
*Exhaust date, the projected date that a telecommunications area code will have assigned all of its numbers

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Synonyms:

### Look at other dictionaries:

• Exhaust — Ex*haust , a. [L. exhaustus, p. p.] 1. Drained; exhausted; having expended or lost its energy. [1913 Webster] 2. Pertaining to steam, air, gas, etc., that is released from the cylinder of an engine after having preformed its work. [1913 Webster]… …   The Collaborative International Dictionary of English

• 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… …   The Collaborative International Dictionary of English

• exhaust — ex‧haust [ɪgˈzɔːst ǁ ˈzɒːst] verb [transitive] 1. if you exhaust a supply of something, you use it all, so that there is none left: • The museum was unable to buy the painting as its funds were exhausted by the purchase of two huge albums of… …   Financial and business terms

• exhaust — ex·haust vt: to use up or consume entirely: as a: to try all of (available remedies) the applicant has exhaust ed the remedies available in the court of the State U.S. Code b: to bring (a claim) through all available prior levels of review each… …   Law dictionary

• exhaust — [eg zôst′, igzôst′] vt. [< L exhaustus, pp. of exhaurire, to draw out, exhaust < ex , out + haurire, to draw, drain < IE base * aus > ON ausa] 1. to draw off or let out completely (air, gas, etc.), as from a container 2. to use up;… …   English World dictionary

• exhaust — [v1] tire or wear out bankrupt, burn out*, conk out*, cripple, debilitate, disable, do in*, drain, draw, enervate, enfeeble, fag, fatigue, frazzle, impoverish, overdo, overexert, overextend, overfatigue, overtire, overwork, peter out*, poop*,… …   New thesaurus

• Exhaust — Ex*haust , n. (Steam Engine) 1. The steam let out of a cylinder after it has done its work there. [1913 Webster] 2. The foul air let out of a room through a register or pipe provided for the purpose. [1913 Webster] …   The Collaborative International Dictionary of English

• exhaust — (v.) 1530s, to draw off or out, to use up completely, from L. exhaustus, pp. of exhaurire draw off, take away, use up, from ex off (see EX (Cf. ex )) + haurire to draw up (as water), from PIE *aus to draw water. Of resources, etc., from 1630s.… …   Etymology dictionary

• exhaust — vb 1 drain, *deplete, impoverish, bankrupt Analogous words: sap, undermine, *weaken: consume, absorb, engross, *monopolize: dissipate, disperse, dispel, *scatter Contrasted words: conserve, preserve, * …   New Dictionary of Synonyms

• exhaust — ► VERB 1) tire out completely. 2) use up (resources or reserves) completely. 3) explore (a subject) thoroughly. 4) expel (gas or steam) from an engine or other machine. ► NOUN 1) waste gases or air expelled from an engine or other machine. 2) …   English terms dictionary