English Dictionary

Pioneers in dictionary publishing since 1819

Definitions of gas

gas (ɡæs Pronunciation for gas



Word forms:   plural gases, gasses
  1. a substance in a physical state in which it does not resist change of shape and will expand indefinitely to fill any container. If very high pressure is applied a gas may become liquid or solid, otherwise its density tends towards that of the condensed phase Compare liquid (sense 1), solid (sense 1)
  2. any substance that is gaseous at room temperature and atmospheric pressure
  3. any gaseous substance that is above its critical temperature and therefore not liquefiable by pressure alone Compare vapour (sense 2)
    1. a fossil fuel in the form of a gas, used as a source of domestic and industrial heat See also coal gas, natural gas
    2. (as modifier)   ⇒ a gas cooker, gas fire
  4. a gaseous anaesthetic, such as nitrous oxide
  5. (mining) firedamp or the explosive mixture of firedamp and air
  6. the usual US, Canadian, and New Zealand word for petrol See also gasoline
  7. See step on the gas

  8. a toxic or suffocating substance in suspension in air used against an enemy
  9. (informal) idle talk or boasting
  10. (slang) a delightful or successful person or thing   ⇒ his latest record is a gas
  11. (US) an informal name for flatus


Word forms:  gases,  gasses,  gassing,  gassed
  1. (transitive) to provide or fill with gas
  2. (transitive) to subject to gas fumes, esp so as to asphyxiate or render unconscious
  3. (intransitive) to give off gas, as in the charging of a battery
  4. (transitive) (in textiles) to singe (fabric) with a flame from a gas burner to remove unwanted fibres
  5. (intransitive) foll by to (informal) to talk in an idle or boastful way (to a person)
  6. (transitive) (slang, mainly US & Canadian) to thrill or delight

Derived Forms

ˈgasless adjective

Word Origin

C17 (coined by J. B. van Helmont (1577–1644), Flemish chemist): modification of Greek khaos atmosphere

Ga2 or (ɡɑː Pronunciation for )



  1. Word forms:   plural Ga, Gas, , Gãs
    . a member of a Negroid people of W Africa living chiefly in S Ghana
  2. the language of this people, belonging to the Kwa branch of the Niger-Congo family

Translations for 'gas'

  • British English: gasPronunciation for gas A gas is any substance that is neither liquid nor solid.Hydrogen is a gas, not a metal.ɡæs NOUN
  • Arabic: غَازPronunciation for غَاز
  • Brazilian Portuguese: gásPronunciation for gás
  • Chinese: 煤气Pronunciation for 煤气
  • Croatian: plinPronunciation for plin
  • Czech: plynPronunciation for plyn
  • Danish: gasPronunciation for gas
  • Dutch: gasPronunciation for gas
  • European Spanish: gasPronunciation for gas
  • Finnish: kaasuPronunciation for kaasu
  • French: gazPronunciation for gaz
  • German: GasPronunciation for Gas
  • Greek: αέριοPronunciation for αέριο
  • Italian: gasPronunciation for gas
  • Japanese: ガスPronunciation for ガス
  • Korean: 가스Pronunciation for 가스
  • Norwegian: gassPronunciation for gass
  • Polish: gazPronunciation for gaz
  • Portuguese: gásPronunciation for gás
  • Romanian: gaz gaze
  • Russian: газPronunciation for газ
  • Spanish: gasPronunciation for gas
  • Swedish: gasPronunciation for gas
  • Thai: แก๊ซPronunciation for แก๊ซ
  • Turkish: gazPronunciation for gaz
  • Ukrainian: газ
  • Vietnamese: khí gaPronunciation for khí ga
  • British English: gas To gas a person or animal means to kill them by making them breathe poisonous gas. VERBHer husband ran a pipe from her car exhaust to the bedroom in an attempt to gas her.
  • Brazilian Portuguese: asfixiar com gás
  • Chinese: 用毒气杀死用毒气氣杀殺死
  • European Spanish: gasear
  • French: asphyxier
  • German: vergasen
  • Italian: asfissiare con il gas
  • Japanese: 毒ガスで殺す
  • Korean: 독가스로 죽이다
  • Portuguese: asfixiar com gás
  • Spanish: gasear

Example Sentences Including 'gas'

Posy huddled in the furthest corner of the ambulance, clung on to a strap and eyed the gas and air with envy.
Christina Jones TICKLED PINK (2002)
He told me about nebulae, towering clouds of luminous gas which float through space like vast jellyfish.
Isabel Wolff RESCUING ROSE (2002)
They focussed, briefly, on the gas canister (currently burning), then alighted on Arthur's laptop computer.
Nicola Barker BEHINDLINGS (2002)


Comment by Collins Dictionary (Admin) on 13 Dec 2012

'gas' definition based on an original suggestion by Daved Wachsman made on the 09 October 2012.

Report as inappropriate
Log in to comment on this word.