- Gas is defined as an air-like substance that expands to fill the space it is in. It also refers to a substance used as fuel.
- An example of gas is helium.
- An example of gas is the fuel you put in your car to get it to move.
- The definition of gas is to expose someone to gas fumes, to treat chemically with gas or to give off gas fumes.
- An example of gas is when you give someone nitrous oxide.
- An example of gas is when people are exposed to mustard gas in a war setting.
- An example of gas is when a car exhaust gives off fumes into the air.
Helium is the gas making these balloons float.
nounpl. gases or gasses
- the fluid form of a substance in which it can expand indefinitely and completely fill its container; form that is neither liquid nor solid; vapor
- any mixture of flammable gases used for lighting, heating, or cooking
- any gas, as nitrous oxide, used as an anesthetic
- any substance, as phosgene, intentionally dispersed through the atmosphere, as in war, to act as a poison, irritant, or asphyxiant
- various gaseous substances formed by living or decaying matter, esp. if formed in the stomach, bowels, etc.
- Informal gasoline
- ☆ Slang
- idle or boastful talk
- something or someone that is very pleasing, exciting, amusing, etc.: the movie was a gas
- Mining a mixture of firedamp with air, that explodes if ignited
Origin of gasModern Latin altered by Van Helmont (1577-1644), Belgian chemist (with g- pronounced, as in Dutch as a voiced fricative) ; from Classical Greek chaos, air (see chaos), term used by Paracelsus
transitive verbgassed, gassing
- to supply with gas
- to subject to the action of gas
- to injure or kill by gas, as in war
- ☆ Slang to thrill, delight, amuse greatly, etc.
- to give off gas
- ☆ Slang to talk in an idle or boastful way
step on the gas☆
- Slang to press on the accelerator of an automobile
- to hurry; move or act faster
nounpl. gas·es or gas·ses
- a. 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.b. A substance in the gaseous state.
- A gaseous fuel, such as natural gas.
- The speed control of a gasoline engine. Used with the: Step on the gas.
- A gaseous asphyxiant, irritant, or poison.
- A gaseous anesthetic, such as nitrous oxide.
- a. Flatulence.b. Flatus.
- Slang Idle or boastful talk.
- Slang Someone or something exceptionally exciting or entertaining: The party was a gas.
verbgassed gassed, gas·sing, gas·es or gas·ses
- To treat chemically with gas.
- To overcome, disable, or kill with poisonous fumes.
- To give off gas.
- Slang To talk excessively.
Origin of gasDutch, 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.
(countable and uncountable, plural gases or gasses)
- (uncountable, chemistry) Matter in a state intermediate between liquid and plasma that can be contained only if it is fully surrounded by a solid (in a bubble of liquid) (held together by gravitational pull); it can condense into a liquid, or can (rarely) become a solid directly.
- A lot of gas had escaped from the cylinder.
- (countable, chemistry) A chemical element or compound in such a state.
- The atmosphere is made up of a number of different gases.
- (uncountable) 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.
- Gas-fired power stations have largely replaced coal-burning ones.
- (countable) A hob on a gas cooker.
- She turned the gas on, put the potatoes on, then lit the oven.
- (US) Methane or other waste gases trapped in one's belly as a result of the digestive process.
- My tummy hurts so bad, I have gas.
- (slang) A humorous or entertaining event or person.
- He is such a gas!
- (baseball) A fastball.
- The closer threw him nothing but gas.
(third-person singular simple present gases, present participle gassing, simple past and past participle gassed)
From Dutch gas, a word coined by chemist Van Helmont. From Ancient Greek χάος (khaos, “chasm, void”).
(third-person singular simple present gases or gasses, present participle gassing, simple past and past participle gassed)
- (US) To give a vehicle more fuel in order to accelerate it.
- The cops are coming. Gas it!
- (US) To fill (a vehicle's fuel tank) with fuel
Shortening of gasoline.
- This is common in speech, but rarely used in writing.
Compare the slang usage of "a gas", above.