| Automotive. gas (def. 5b). |
[gas] 
noun, plural gas⋅es, verb, gassed, gas⋅sing.| 1. | Physics. a substance possessing perfect molecular mobility and the property of indefinite expansion, as opposed to a solid or liquid. |
| 2. | any such fluid or mixture of fluids. |
| 3. | any such fluid used as an anesthetic, as nitrous oxide: Did the dentist give you gas for your extraction? |
| 4. | any such combustible fluid used as fuel: Light the gas in the oven. |
| 5. | Automotive.
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| 6. | flatus. |
| 7. | Coal Mining. an explosive mixture of firedamp with air. |
| 8. | an aeriform fluid or a mistlike assemblage of fine particles suspended in air, used in warfare to asphyxiate, poison, or stupefy an enemy. |
| 9. | Slang.
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| 10. | to supply with gas. |
| 11. | to overcome, poison, or asphyxiate with gas or fumes. |
| 12. | to singe (yarns or fabrics) with a gas flame to remove superfluous fibers. |
| 13. | to treat or impregnate with gas. |
| 14. | Slang.
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| 15. | to give off gas, as a storage battery being charged. |
| 16. | Slang.
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| 17. | gas up, to fill the gasoline tank of an automobile, truck, or other vehicle. |
| 18. | step on the gas, Informal. to increase the speed of one's movement or activity; hurry: We'd better step on the gas or we'll be late for the concert. |
gas (gās)
n. pl. gas·es or gas·ses
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.
A substance in the gaseous state.
A gaseous fuel, such as natural gas.
Gasoline.
A gaseous asphyxiant, an irritant, or a poison.
A gaseous anesthetic, such as nitrous oxide.
Flatulence.
Flatus.
To treat chemically with gas.
To overcome, disable, or kill with poisonous fumes.
To give off gas.
| gas (gās) Pronunciation Key
One of four main states of matter, composed of molecules in constant random motion. Unlike a solid, a gas has no fixed shape and will take on the shape of the space available. Unlike a liquid, the intermolecular forces are very small; it has no fixed volume and will expand to fill the space available. gaseous adjective (gās'ē-əs, gāsh'əs) |