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English Dictionary

Definitions of gas

gas  (ɡæs



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 )



  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: gas A gas is any substance that is neither liquid nor solid.Hydrogen is a gas, not a metal.ɡæs NOUN
  • Arabic: غَاز
  • Brazilian Portuguese: gás
  • Chinese: 煤气
  • Croatian: plin
  • Czech: plyn
  • Danish: gas
  • Dutch: gas
  • European Spanish: gas
  • Finnish: kaasu
  • French: gaz
  • German: Gas
  • Greek: αέριο
  • Italian: gas
  • Japanese: ガス
  • Korean: 가스
  • Norwegian: gass
  • Polish: gaz
  • Portuguese: gás
  • Romanian: gaz gaze
  • Russian: газ
  • Spanish: gas
  • Swedish: gas
  • Thai: แก๊ซ
  • Turkish: gaz
  • Ukrainian: газ
  • Vietnamese: 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.

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