English Reference

Word

gas

US/ˈɡæs/

UK/ɡˈæs/

UK spelling · gases

Definitions

01state of matter

A2 · Elementary Countable noun Science

n. a substance like air that is not a solid or a liquid.

n. a substance in a physical state of matter characterized by low density and the ability to expand indefinitely.

“Oxygen is a gas that humans need to breathe to stay alive.”

“The experiment demonstrates how the volume of a gas increases when the temperature rises while pressure remains constant.”

Synonyms

Antonyms

02fuel for heating or cooking

A2 · Elementary Uncountable noun

n. a substance burned as fuel for heating houses or cooking food.

n. natural gas or a similar gaseous fuel used as a utility for domestic or industrial energy.

“I prefer cooking with gas because it is easier to control the heat.”

“The utility company sent a technician to investigate a possible leak in the main gas line outside the apartment complex.”

Synonyms

fuelnatural gas

03fuel for cars

A2 · Elementary Uncountable noun American English

n. a liquid fuel used to power cars and other vehicles.

n. a liquid petroleum derivative used as fuel in internal combustion engines; an ellipsis of 'gasoline'.

“We should stop at the next station because the car is almost out of gas.”

“Rising gas prices have prompted many commuters to consider switching to electric vehicles or using public transportation.”

Pitfall

I need to buy some petrol for my car in New York.

I need to buy some gas for my car in New York.

In American English, use 'gas'; 'petrol' is the British English equivalent.

04digestive air

B1 · Intermediate Uncountable noun Medicine

n. air that builds up in your stomach or bubbles out of your body.

n. intestinal or stomach flatus produced during the digestive process.

“Certain foods like beans can give you gas and make you feel bloated.”

“The patient complained of abdominal discomfort and persistent gas following the dietary changes recommended by the nutritionist.”

Synonyms

flatulencewind

05something funny

C1 · Advanced Countable noun Informal · British English · Dialect

n. a person or an event that is very funny or entertaining.

n. an entertaining or humorous person, situation, or experience.

“The party last night was a total gas; we didn't stop laughing.”

“The local comedy night proved to be a real gas, featuring several up-and-coming performers who kept the audience engaged for hours.”

Synonyms

Antonyms

06to poison with gas

B2 · Upper Intermediate Military

v. to attack or kill someone using poisonous gas.

v. to expose a person or animal to poisonous gas with the intent to injure or kill.

“The soldiers were warned that the enemy might try to gas them during the night.”

“Historical accounts detail the horrific consequences when troops were gassed in the trenches during the First World War.”

Synonyms

poisonasphyxiate

07to talk a lot

C2 · Proficiency Informal · British English

v. to talk for a long time about things that are not important.

v. to engage in idle, boastful, or empty conversation for an extended period.

“They spent the whole afternoon gassing about their old school days.”

“The neighbors stood by the garden fence for nearly an hour, gassing away about local gossip and the upcoming village festival.”

Synonyms

08funny or amusing

C1 · Advanced Informal · Dialect

adj. very funny or strange in an entertaining way.

adj. comical, amusing, or zany in nature.

“He is a gas man; he always has a funny story to tell.”

“It was gas to see the look on his face when he realized we were all in on the joke.”

Usage

Common in Irish English to describe a funny person or situation.

Synonyms

Antonyms

Collocations

Common phrases and expressions where native English speakers use the word “gas” in context.

01. natural gas

Word family

NOUN

gas(A2)

ADJECTIVE

Related words

Idioms

Domains

BusinessEducationMedicineMilitary

This entry

Exam level
CambridgeCambridgeCambridge English QualificationsThe exam suite from Cambridge University Press & Assessment, from A1 Movers up to C2 Proficiency. The benchmark names double as CEFR labels.A2 KeyIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.3.0–4.0TOEFL iBTTOEFL iBTTest of English as a Foreign Language, Internet-Based TestETS's academic English test, the standard route for US university admissions. Scored 0–120, with a 1–6 scale since 2026.1–6 scale: 2.0–2.524–43TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.225–549
Frequency
Very common
Level
A2 · ElementaryOxford
Updated

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