\ ˈgas How to pronounce gas (audio) \
plural gases also gasses

Definition of gas

 (Entry 1 of 2)

1 : a fluid (such as air) that has neither independent shape nor volume but tends to expand indefinitely
2a : a combustible gas or gaseous mixture for fuel or lighting especially : natural gas
b : a gaseous product of digestion also : discomfort from this
c : a gas or gaseous mixture used to produce anesthesia
d : a substance that can be used to produce a poisonous, suffocating, or physically irritating atmosphere
3 : empty talk : bombast His talk about quitting his job was all gas.
4 : gasoline also : the accelerator pedal of an automotive vehicle
5 : driving force : energy I was young, and full of gas— H. L. Mencken ran out of gas in the seventh inning
6 slang : something that gives pleasure : delight the party was a gas
7 baseball, informal : fast and powerfully thrown pitches : smoke sense 8 That's Nate on the mound in the glossy photo in his dad's office, throwing gas in some Little League game.— Austin Murphy


gassed; gassing

Definition of gas (Entry 2 of 2)

intransitive verb

1 : to talk idly or garrulously
2 : to give off gas (see gas entry 1 sense 1)
3 : to fill the tank (as of an automobile) with gasoline usually used with up

transitive verb

1 : to supply with gas or especially gasoline gas up the car
2a : to treat chemically with gas
b : to poison or otherwise affect adversely with gas
3 slang : to please greatly

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Examples of gas in a Sentence

Noun Carbon monoxide is a poisonous gas. We heat our house with gas. Do you have a gas stove or an electric one? The car gets good gas mileage. The car almost ran out of gas. He was driving with one foot on the gas and one foot on the brake. Verb soldiers gassed on the battlefield We stopped to gas the car.
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Recent Examples on the Web: Noun DeHaan said some Southeast states may experience price increases, but only if the shutdown lasts more than 5 days; when the pipeline shut down for more than 10 days in 2016, gas prices rose by as much as 30 cents per gallon in some states. Jonathan Ponciano, Forbes, "Cyberattacks Against U.S. Infrastructure Are 'Here To Stay' After 100-Gigabyte Colonial Pipeline Hack, Biden Official Warns," 9 May 2021 Without going into the science of greenhouse gas effect, because of climate change, temperatures are going up. Lisa Deaderick, San Diego Union-Tribune, "Environmental issues play a part in layers of systemic and structural racism," 9 May 2021 Black businessman Horatio Thomas sold gas at cost to the boycott participants, and a predominately white radio station encouraged black residents to boycott and offered carpools. Lauren M. Johnson, CNN, "Louisiana unveils civil rights markers honoring the courage of activists and the places they organized and boycotted for change," 8 May 2021 After food and gas, there wasn’t much left over, and Washington was forced to let some of her bills go unpaid. Jon Schuppe, NBC News, "In Nevada, drivers can be arrested for unpaid tickets. Activists are fighting to change that.," 8 May 2021 But things are changing for the gas-rich emirate’s 2m migrant workers, who are 95% of its labour force. The Economist, "Foreign workers in Qatar get some basic rights," 8 May 2021 The fire was being fed by natural gas, and firefighters were still working to control the gas leak by Saturday afternoon, authorities said. Meredith Deliso, ABC News, "'Horrific' shooting and fire leaves 4 dead, including suspect, 1 injured," 8 May 2021 The first leg of that effort, announced April 20, will address security holes in the electrical grid, before moving to other sectors, including the country’s gas pipelines and water utilities. Mike Jeffers, Fortune, "A cyber attack has shut down the country’s largest gasoline pipeline," 8 May 2021 The chef kitchen has a gas cooktop, island with an eating bar, granite counters and two pantries. oregonlive, "On the market: Homes with a kid-friendly backyard sell quicker and for more, says Zillow," 8 May 2021 Recent Examples on the Web: Verb Below, Utica shares an exclusive playlist with Billboard, featuring the songs that gas her up on a day-to-day basis. Stephen Daw, Billboard, "Utica Queen Wiggles Down to Her 'Drag Race' Playlist with Carly Rae Jepsen, Olivia Rodrigo & More," 16 Apr. 2021 Lane Kiffin’s group leads the SEC averaging 536 yards in this young season with quick quarterbacks and schemes that can gas a defense. Michael Casagrande |, al, "A look at Alabama’s pass rush after 2 games," 6 Oct. 2020 But when flying presents too much of a risk (and your pet may prefer to stay grounded anyway), the only option, really, is to gas up the car, requires more forethought. Andrea Cheng, Condé Nast Traveler, "Everything You Need to Pack for Road Trips With Pets," 12 Aug. 2020 Critics have alleged that officers have been quick to indiscriminately gas largely peaceful crowds, when only a small number of individuals commit crimes such as throwing projectiles at officers and setting fires. Katie Shepherd, Washington Post, "Another Portland protest ended with tear gas after police declared a riot," 13 Aug. 2020 This was a large contrast from recent weeks, where federal officers would gas crowds nightly. oregonlive, "Portland’s 66th day of protests already underway with march in N. Portland," 1 Aug. 2020 There's no telling how long TJ will have this drag on for, and some players will gas out. Sydney Bucksbaum,, "The Challenge: Total Madness recap: Where's Dee?," 18 June 2020 Montgomery:Attendants are coming out to gas up cars, clean windshields and even deliver food and drinks from inside at a dozen MAPCO stations nationwide, including one in Montgomery. USA TODAY, "Rock Hall, Hard Rock resort, full-service gas: News from around our 50 states," 13 June 2020 The video is set to triumphant music, without including any of his threatening language or images of protesters being tear-gassed that preceded the PR stunt. cleveland, "D.C. bishop calls Trump photo op ‘antithetical to everything we as a church stand for’ in ‘CBS This Morning’ interview," 2 June 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'gas.' 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 gas


1779, in the meaning defined at sense 1


1849, in the meaning defined at intransitive sense 1

History and Etymology for gas


New Latin, alteration of Latin chaos space, chaos


derivative of gas entry 1

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Learn More about gas

Statistics for gas

Last Updated

12 May 2021

Cite this Entry

“Gas.” Dictionary, Merriam-Webster, Accessed 13 May. 2021.

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More Definitions for gas



English Language Learners Definition of gas

 (Entry 1 of 2)

: a substance (such as oxygen or hydrogen) that is like air and has no fixed shape
: a gas or mixture of gases that is burned as a fuel
US : gas in your stomach and intestines that causes pain or discomfort



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

: to poison or kill (someone) with gas
US : to put gasoline in (a car, truck, etc.)


\ ˈgas How to pronounce gas (audio) \
plural gases

Kids Definition of gas

 (Entry 1 of 2)

1 : a substance (as oxygen or hydrogen) having no fixed shape and tending to expand without limit
3 : a gas or a mixture of gases used to make a person unconscious (as for an operation)
4 : a substance that poisons the air or makes breathing difficult
5 : gasoline
6 : a gaseous product of digestion or the discomfort caused by it


gassed; gassing; gasses

Kids Definition of gas (Entry 2 of 2)

1 : to poison with gas “Her boy was gassed in the trenches,” Grandma said.— Richard Peck, A Year Down Yonder
2 : to supply with gas Gas up the car.


\ ˈgas How to pronounce gas (audio) \
plural gases also gasses

Medical Definition of gas

 (Entry 1 of 3)

1 : a fluid (as air) that has neither independent shape nor volume but tends to expand indefinitely
2 : a gaseous product of digestion also : discomfort from this
3 : a gas or gaseous mixture used to produce anesthesia
4 : a substance that can be used to produce a poisonous, asphyxiating, or irritant atmosphere
gassed; gassing

Medical Definition of gas (Entry 2 of 3)

1 : to treat chemically with gas
2 : to poison or otherwise affect adversely with gas

Medical Definition of GAS (Entry 3 of 3)

general adaptation syndrome

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