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

Other Words from exhaust


exhauster noun
exhaustibility \ ig-​ˌzȯ-​stə-​ˈbi-​lə-​tē How to pronounce exhaust (audio) \ noun
exhaustible \ ig-​ˈzȯ-​stə-​bəl How to pronounce exhaust (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.
Recent Examples on the Web: Verb Washington, Grand Rapids’ first Black city manager, announced operational changes that included banning chokeholds and requiring officers to exhaust all alternatives and give verbal warnings before using deadly force. Washington Post, 21 Apr. 2022 State workers who exhaust all their sick time could be required to quarantine without being paid. From Usa Today Network And Wire Reports, USA TODAY, 5 Nov. 2021 That can exhaust a partner who doesn’t have the temperament for flux. Washington Post, 19 Apr. 2016 Garmus’ commitment to portraying the near countless ways sexism trivialized and muzzled women may exhaust some readers. Erin Douglass, The Christian Science Monitor, 8 Apr. 2022 Biocides tainted their food, factory and automobile exhaust their air, and waste products their water. Jack E. Davis, Smithsonian Magazine, 1 Apr. 2022 To keep domestic flights airworthy, airlines will have to exhaust their supplies of parts and then start cannibalizing components from planes. Samanth Subramanian, Quartz, 7 Mar. 2022 In a change from last year, employers can no longer require workers to exhaust their supplementary paid sick leave before being paid to stay home under the Cal/OSHA rules. Chase Difeliciantonio, San Francisco Chronicle, 7 Feb. 2022 Love is expected to provide an immediate lift, helping fill the void that will be created when starting guards Jadyn Pimentel and Lapraisjah Johnson exhaust their eligibility at the end of the season. Greg Luca, San Antonio Express-News, 3 Mar. 2022 Recent Examples on the Web: Noun Other highlights include a beasty titanium exhaust by Akrapovič, specially designed aluminum wheels with high-performance tires by Michelin and a striking rear light created by GERG Lighthouse. Rachel Cormack, Robb Report, 5 May 2022 This supplies fresh air to the hot exhaust gasses, igniting them, and creating that secondary combustion. Bradley Ford, Popular Mechanics, 2 May 2022 But others call the plan, which is still being tweaked, a major improvement, providing safer streets and an alternative to exhaust-spewing vehicles. Rachel Uranga, Los Angeles Times, 29 Apr. 2022 The electric motor, about 1.6 inches thick, is attached to common shaft between the turbine and compressor wheels, so the motor can spin the shaft before the exhaust gases do. Caleb Miller, Car and Driver, 26 Apr. 2022 A few years ago, the school had to install a multimillion-dollar heating and cooling system to filter out vehicle exhaust from the highway. New York Times, 21 Apr. 2022 There’s a greater total global warming impact when scientists consider the heating effect of planes’ contrails – those temporary, line-like clouds formed by an airplane’s exhaust stream. Stephanie Hanes, The Christian Science Monitor, 18 Apr. 2022 At one point in the company's promotional video, a handful of employees can be seen running from an expanding cloud of dust and exhaust. Eric Berger, Ars Technica, 15 Apr. 2022 Thefts of the exhaust scrubbing devices, which contain valuable metals, are a nationwide and increasingly hazardous problem. Jesse Leavenworth, courant.com, 6 Apr. 2022 See More

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.

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

Learn More About exhaust

Time Traveler for exhaust

Time Traveler

The first known use of exhaust was in 1531

See more words from the same year

Statistics for exhaust

Last Updated

7 May 2022

Cite this Entry

“Exhaust.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/exhaust. Accessed 17 May. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

More Definitions for exhaust


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


transitive verb
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


transitive verb

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

More from Merriam-Webster on exhaust

Nglish: Translation of exhaust for Spanish Speakers

Britannica English: Translation of exhaust for Arabic Speakers

Britannica.com: Encyclopedia article about exhaust


Test Your Vocabulary

Which Word Does Not Belong?

  • one green toy robot amidst many red toy robots
  • Which of these words does not mean "nonsense"?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

Universal Daily Crossword

A daily challenge for crossword fanatics.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!