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 Add those infractions to the incessant lying, snitching, backstabbing, and accusations of alcoholism, and yeah...I'm sure you'd be exhausted, too. Ineye Komonibo, refinery29.com, "People Can’t Get Over How Sad Peter Weber Looks In This Interview," 7 Feb. 2020 Driving a 911 hard in Germany is restorative, not exhausting. Tony Quiroga, Car and Driver, "Testing Porsche's New 911 in Germany," 15 Jan. 2020 The result is a curious and at times exhausting book. Philip Kennicott, Washington Post, "He burned Frank Lloyd Wright’s house and killed his mistress — but why?," 22 Nov. 2019 Moore and Dixon will definitely be around for longer, likely exhausting the duration of their eligibility with the Wildcats. Emily Caron, SI.com, "Top-Five Freshman Class Gives Jay Wright Plenty to Work With at Villanova," 19 Sep. 2019 The weeks of living under fire’s unrelenting threat has exhausted Young. Washington Post, "Firenados, ember attacks and megafires: Australia is seeing sci-fi weather," 13 Jan. 2020 Senior cornerback Donte Vaughn, who started three games in 2019, also exhausted his eligibility. Tyler James, Indianapolis Star, "Notre Dame football: Shaun Crawford to return for 6th year," 12 Jan. 2020 After more than nine weeks, resources are stretched and civilians and firefighters are exhausted. Lauren Williams, USA TODAY, "'We were in the middle of it': Stories of survival and mateship as Australia battles deadly bushfires," 11 Jan. 2020 But across the country’s heavily populated eastern coast, the public’s patience is nearly exhausted and turning rapidly to fury. New York Times, "As Fires Rage, Australia Sees Its Leader as Missing in Action," 4 Jan. 2020 Recent Examples on the Web: Noun Speaking of that engine, despite the M badging and M Sport exhaust, the 523-hp N63 V-8 is never intrusive, and the X7's cabin is always insulated and quiet. Maxwell B. Mortimer, Car and Driver, "2020 BMW X7 M50i Arrives for a 40,000-Mile Test," 13 Feb. 2020 However, Marc Weisskopf, a professor of environmental epidemiology at the T.H. Chan School of Public Health at Harvard University, coauthored a federally funded study in 2018 that linked exposure to diesel exhaust to greater risks of developing ALS. Brian Macquarrie, BostonGlobe.com, "Illnesses spark concerns about workplace hazards at Springfield courthouse," 4 Feb. 2020 The Lohner firm thought that electric cars would be particularly marketable given their lack of noise and exhaust fumes. Adam Kaslikowski, Ars Technica, "Check out the first-ever electric car designed by Porsche, the 1898 P1," 4 Feb. 2020 The recipe also calls for a hefty supercharger atop its 5.2-liter V8, 2.75-inch exhaust piping, aggressive suspension tuning and a Tremec seven-speed dual-clutch transmission. Jeff Yip, Houston Chronicle, "Upcoming Chevy Corvette, Tahoe among highlights of Houston Auto Show," 24 Jan. 2020 The media galaxy, however, is undeniably changing, making trends as difficult to pinpoint as X-wing fighters attempting to hit a small exhaust port on the Death Star. Brian Lowry, CNN, "As 'Star Wars' disappoints, studios might need to adjust streaming-age expectations," 14 Jan. 2020 Before dust even gets to the exhaust filter, there’s a high-efficiency filtering bag to traps larger particles. Carolyn Forte, Good Housekeeping, "5 Best HEPA Vacuum Cleaners, According to Cleaning Experts," 9 Jan. 2020 Sitting that low, there’s no space beneath the engine now for the exhaust manifolds to dump the LT2’s spent gases. Dan Carney, Popular Science, "The Corvette is finally the supercar it deserves to be," 2 Jan. 2020 If a vehicle tail pipe becomes buried by snow, slush, mud or water, exhaust can back up into the vehicle cabin and cause death from carbon monoxide poisoning. Tim Macwelch, Outdoor Life, "10 Survival Tips To Get You Through Winter," 30 Dec. 2019

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

16 Feb 2020

Cite this Entry

“Exhaust.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/exhaust. Accessed 24 Feb. 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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