from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The state of matter distinguished from the solid and liquid states by relatively low density and viscosity, relatively great expansion and contraction with changes in pressure and temperature, the ability to diffuse readily, and the spontaneous tendency to become distributed uniformly throughout any container.
  • n. A substance in the gaseous state.
  • n. A gaseous fuel, such as natural gas.
  • n. Gasoline.
  • n. The speed control of a gasoline engine. Used with the: Step on the gas.
  • n. A gaseous asphyxiant, irritant, or poison.
  • n. A gaseous anesthetic, such as nitrous oxide.
  • n. Flatulence.
  • n. Flatus.
  • n. Slang Idle or boastful talk.
  • n. Slang Someone or something exceptionally exciting or entertaining: The party was a gas.
  • transitive v. To treat chemically with gas.
  • transitive v. To overcome, disable, or kill with poisonous fumes.
  • intransitive v. To give off gas.
  • intransitive v. Slang To talk excessively.
  • gas up To supply a vehicle with gas or gasoline: gas up a car; gassed up before the trip.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. comical, zany.
  • n. Matter in a state intermediate between liquid and plasma that can be contained only if it is fully surrounded by a solid (or held together by gravitational pull); it can condense into a liquid, or can (rarely) become a solid directly.
  • n. A chemical element or compound in such a state.
  • n. A flammable gaseous hydrocarbon or hydrocarbon mixture (typically predominantly methane) used as a fuel, e.g. for cooking, heating, electricity generation or as a fuel in internal combustion engines in vehicles.
  • n. A hob on a gas cooker.
  • n. Methane or other waste gases trapped in one's belly as a result of the digestive process.
  • n. A humorous or entertaining event or person.
  • n. A fastball.
  • v. To kill with poisonous gas.
  • v. To talk, chat.
  • v. To emit gas.
  • n. Gasoline; a derivative of petroleum used as fuel.
  • v. To give a vehicle more fuel in order to accelerate it.
  • v. To fill (a vehicle's fuel tank) with fuel

from the GNU version of the Collaborative International Dictionary of English

  • n. An aëriform fluid; -- a term used at first by chemists as synonymous with air, but since restricted to fluids supposed to be permanently elastic, as oxygen, hydrogen, etc., in distinction from vapors, as steam, which become liquid on a reduction of temperature. In present usage, since all of the supposed permanent gases have been liquified by cold and pressure, the term has resumed nearly its original signification, and is applied to any substance in the elastic or aëriform state.
  • n.
  • n. A complex mixture of gases, of which the most important constituents are marsh gas, olefiant gas, and hydrogen, artificially produced by the destructive distillation of gas coal, or sometimes of peat, wood, oil, resin, etc. It gives a brilliant light when burned, and is the common gas used for illuminating purposes.
  • n. Laughing gas.
  • n. Any irrespirable aëriform fluid.
  • n. same as gasoline; -- a shortened form. Also, the accelerator pedal of a motor vehicle; used in the term “ step on the gas”.
  • n. the accelerator pedal of a motor vehicle; used in the term “ step on the gas”.
  • n. Same as natural gas.
  • n. an exceptionally enjoyable event; a good time.
  • transitive v. To singe, as in a gas flame, so as to remove loose fibers.
  • transitive v. To impregnate with gas.
  • transitive v. to expose to a poisonous or noxious gas.

from The Century Dictionary and Cyclopedia

  • To remove loose filaments from (net, lace, etc.) by passing the material between rollers and exposing it to the action of a large number of minute jets of gas.
  • To talk nonsense or falsehood to; impose upon by wheedling, frothy, or empty speech.
  • To indulge in “gas” or empty talk; talk nonsense.
  • To treat with a gas or expose to the action of a gas, as is done with slaked lime in the manufacture of bleaching-powder.
  • To overcome or poison by means of the inhalation of gas.
  • n. A substance possessing perfect molecular mobility and the property of indefinite expansion.
  • n. Specifically In coal-mining, any explosive mixture of fire-damp with common air.
  • n. In popular language, a compound of various gases, used for illuminating and heating purposes.
  • n. A gas-light: as, the gas is dim; turn down the gas.
  • n. Empty or idle talk; frothy speech; rant.
  • n. Specifically, nitrous-oxid gas when used to produce anæsthesia, most commonly by dentists.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a fluid in the gaseous state having neither independent shape nor volume and being able to expand indefinitely
  • v. show off
  • v. attack with gas; subject to gas fumes
  • n. a state of excessive gas in the alimentary canal
  • n. a fossil fuel in the gaseous state; used for cooking and heating homes
  • n. a pedal that controls the throttle valve
  • n. a volatile flammable mixture of hydrocarbons (hexane and heptane and octane etc.) derived from petroleum; used mainly as a fuel in internal-combustion engines
  • n. the state of matter distinguished from the solid and liquid states by: relatively low density and viscosity; relatively great expansion and contraction with changes in pressure and temperature; the ability to diffuse readily; and the spontaneous tendency to become distributed uniformly throughout any container


Dutch, an occult physical principle supposed to be present in all bodies, alteration of Greek khaos, chaos, empty space, coined by Jan Baptista van Helmont (1577-1644), Flemish chemist.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Dutch gas, a word coined by chemist Van Helmont. Perhaps inspired by Dutch & Flemish gheest "breath, vapour, spirit" or from Ancient Greek χάος (khaos, "chasm, void"). More at ghost, ghastly (Wiktionary)
Shortened from gasoline. (Wiktionary)
Confer slang term "a gas", above. (Wiktionary)



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