ex·​haust | \ ig-ˈzȯst How to pronounce exhaust (audio) \
exhausted; exhausting; exhausts

Definition of exhaust

 (Entry 1 of 2)

transitive verb

1a : to consume entirely : use up exhausted our funds in a week
b : to tire extremely or completely exhausted by overwork
c : to deprive of a valuable quality or constituent exhaust a soil of fertility
2a : to draw off or let out completely
b : to empty by drawing off the contents specifically : to create a vacuum in
3a : to consider or discuss (a subject) thoroughly or completely
b : to try out the whole number of exhausted all the possibilities

intransitive verb

: discharge, empty the engine exhausts through the muffler



Definition of exhaust (Entry 2 of 2)

1a : the escape of used gas or vapor from an engine
b : the gas or vapor thus escaping
2a : the conduit through which used gases escape
b : an arrangement for removing fumes, dusts, or odors from an enclosure

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Other Words from exhaust


exhauster noun
exhaustibility \ ig-​ˌzȯ-​stə-​ˈbi-​lə-​tē How to pronounce exhaustibility (audio) \ noun
exhaustible \ ig-​ˈzȯ-​stə-​bəl How to pronounce exhaustible (audio) \ adjective

Choose the Right Synonym for exhaust


deplete, drain, exhaust, impoverish, bankrupt mean to deprive of something essential to existence or potency. deplete implies a reduction in number or quantity so as to endanger the ability to function. depleting our natural resources drain implies a gradual withdrawal and ultimate deprivation of what is necessary to an existence. personal tragedy had drained him of all spirit exhaust stresses a complete emptying. her lecture exhausted the subject impoverish suggests a deprivation of something essential to richness or productiveness. impoverished soil bankrupt suggests impoverishment to the point of imminent collapse. war had bankrupted the nation of resources

tire, weary, fatigue, exhaust, jade mean to make or become unable or unwilling to continue. tire implies a draining of one's strength or patience. the long ride tired us out weary stresses tiring until one is unable to endure more of the same thing. wearied of the constant arguing fatigue suggests great lassitude from excessive strain or undue effort. fatigued by the day's chores exhaust implies complete draining of strength by hard exertion. shoveling snow exhausted him jade suggests the loss of all freshness and eagerness. appetites jaded by overindulgence

Examples of exhaust in a Sentence

Verb If they keep spending this way, they'll exhaust their savings. He can talk about baseball for hours and still feel that he hasn't exhausted the subject . Noun diesel exhaust from passing trucks There's a problem with the car's exhaust.
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Recent Examples on the Web: Verb In fact, a detailed list of them would exhaust the space of a short column. Matthew Walther, TheWeek, "The case against D.C. statehood," 27 June 2020 That means the some firms could exhaust their PPP money by as early as next week. Stephen Gandel, CBS News, "Thousands of companies that borrowed from U.S. relief fund plan layoffs," 26 June 2020 With so much at stake, and the financial resources to exhaust every avenue of appeal, the Wests were unlikely to cut their losses prematurely. Tim Sullivan, The Courier-Journal, "Maximum Security's Kentucky Derby DQ appeal was about everything except interference," 18 June 2020 Requiring an officer to exhaust all other options before shooting. Brandi Addison, Dallas News, "After protests, Frisco leaders invite discussion on race and policing in increasingly diverse city," 17 June 2020 Moreover, many economists expect bankruptcies to rise as companies, facing low revenues, exhaust their cash piles. The Economist, "Acute or chronic? What the early 1980s implies for unemployment today," 11 June 2020 Turner said his executive order will also require police to deescalate confrontations, exhaust all alternatives before using their guns, and give a warning before shooting. Marisa Iati, BostonGlobe.com, "Mayor bans chokeholds for Houston police, announces move at George Floyd’s funeral," 9 June 2020 Whole-house fans pull in cool air from open windows and doors, and exhaust hot air through the attic and roof, according to Energy.gov. oregonlive, "10 easy ways to stay cool at home this summer," 5 June 2020 The Wildcats exhausted all the Eastern options, but why not play East Carolina instead of Kent State? 61. Berry Tramel, Detroit Free Press, "Here's where Michigan State football, Michigan rank among nonconference schedules," 31 May 2020 Recent Examples on the Web: Noun But that exhaust is simply the reaction product of hydrogen and oxygen, namely water. The Economist, "Hydrogen power After many false starts, hydrogen power might now bear fruit," 4 July 2020 Do not idle your vehicle; exhaust contributes considerably to ozone formation. Madeline Mitchell, The Enquirer, "Air quality alert in effect through holiday weekend across Greater Cincinnati," 3 July 2020 The Level 3 package gets all the goodies from the Level 1 and 2 packages along with a Ford Performance chase rack with a 40-inch LED light bar, an ARB winch-capable front bumper, and a sport exhaust system. Connor Hoffman, Car and Driver, "Ford Ranger Gets 3 Ford Performance Off-Road Packages Full of Badass Upgrades," 30 June 2020 The Environmental Protection Agency has estimated that tailpipe emissions from the newest passenger cars, SUVs, trucks, and buses generate about 99 percent less smog-producing exhaust and soot than those from the 1970 models did. Sam Roberts, BostonGlobe.com, "John J. Mooney, inventor of the catalytic converter," 28 June 2020 The Sabre engine core is the air-breathing heart of the propulsion system stripped of its exhaust nozzle and the precooler. Daniel Oberhaus, Ars Technica, "The rocket motor of the future “breathes” air like a jet engine," 27 June 2020 The Sabre engine core is the air-breathing heart of the propulsion system stripped of its exhaust nozzle and the precooler. Daniel Oberhaus, Wired, "The Rocket Motor of the Future Breathes Air Like a Jet Engine," 26 June 2020 On June 8, a rental company employee called police after discovering that two trucks had very loud exhaust. John Benson, cleveland, "Catalytic converter thief hits rental company: Parma Police Blotter," 24 June 2020 The devices, which are found in a vehicle’s exhaust, contain expensive metals — most often palladium, platinum and rhodium — that can be sold or recycled, police said. Tatiana Sanchez, SFChronicle.com, "Mill Valley police see uptick in catalytic converter thefts," 21 June 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'exhaust.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of exhaust


1531, in the meaning defined at transitive sense 1a


1848, in the meaning defined at sense 1a

History and Etymology for exhaust


Latin exhaustus, past participle of exhaurire, from ex- + haurire to draw; akin to Middle High German œsen to empty, Greek auein to take

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Time Traveler for exhaust

Time Traveler

The first known use of exhaust was in 1531

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Statistics for exhaust

Last Updated

5 Jul 2020

Cite this Entry

“Exhaust.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/exhaust. Accessed 8 Jul. 2020.

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More Definitions for exhaust


How to pronounce exhaust (audio)

English Language Learners Definition of exhaust

 (Entry 1 of 2)

: to use all of someone's mental or physical energy : to tire out or wear out (someone) completely
: to completely use up (something, such as supplies or money)
: to try all of (something)



English Language Learners Definition of exhaust (Entry 2 of 2)

: the mixture of gases produced by an engine
: a pipe or system of pipes through which exhaust is released


ex·​haust | \ ig-ˈzȯst How to pronounce exhaust (audio) \
exhausted; exhausting

Kids Definition of exhaust

 (Entry 1 of 2)

1 : to tire out : fatigue Hard work will exhaust you.
2 : to use up completely We've exhausted our supplies.
3 : to try out all of We exhausted all options.



Kids Definition of exhaust (Entry 2 of 2)

1 : the gas that escapes from an engine
2 : a system of pipes through which exhaust escapes
ex·​haust | \ ig-ˈzȯst How to pronounce exhaust (audio) \

Medical Definition of exhaust

1a : to draw off or let out completely
b : to empty by drawing off the contents specifically : to create a vacuum in
2a : to use up : consume completely
b : to tire extremely or completely exhausted by overwork
3 : to extract completely with a solvent exhaust a drug with alcohol

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Legal Definition of exhaust

: to use up or consume entirely: as
a : to try all of (available remedies) the applicant has exhausted the remedies available in the courts of the StateU.S. Code
b : to bring (a claim) through all available prior levels of review each of his claims would now be exhausted— W. R. LaFave and J. H. Israel

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Comments on exhaust

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