gas

gas (g

n. pl. 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.

2. A gaseous fuel, such as natural gas.

3. Gasoline.

4. The speed control of a gasoline engine. Used with the: Step on the gas.

5. A gaseous asphyxiant, irritant, or poison.

6. A gaseous anesthetic, such as nitrous oxide.

a. Flatulence.

b. Flatus.

8. Slang Idle or boastful talk.

9. Slang Someone or something exceptionally exciting or entertaining: The party was a gas.

v. gassed, gas·sing, gas·es or gas·ses

v.tr.

1. To treat chemically with gas.

2. To overcome, disable, or kill with poisonous fumes.

v.intr.

1. To give off gas.

2. Slang To talk excessively.

Phrasal Verb:

gas up

To supply a vehicle with gas or gasoline: gas up a car; gassed up before the trip.

[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.]

gas

Noun

pl gases or gasses

1. an airlike substance that is neither liquid nor solid at room temperature and atmospheric pressure

2. a fossil fuel in the form of a gas, used as a source of heat

3. an anaesthetic in the form of a gas

4. Mining firedamp or the explosive mixture of firedamp and air

5. US, Canad, Austral, NZ petrol

6. a poisonous gas used in war

7. Informal idle talk or boasting

8. Slang an entertaining person or thing: Monterey was a gas for musicians and fans alike

9. US informal gas generated in the alimentary canal

Verb

gases or gasses, [gassing, gassed]

1. to subject to gas fumes so as to make unconscious or to suffocate

2. Informal to talk a lot; chatter [coined from Greek khaos atmosphere]

gas (g

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 (g

s, g

ThesaurusLegend: Synonyms Related Words Antonyms

Noun	1.	gas - 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 gaseous state state of matter, state - (chemistry) the three traditional states of matter are solids (fixed shape and volume) and liquids (fixed volume and shaped by the container) and gases (filling the container); "the solid state of water is called ice"
	2.	gas - a fluid in the gaseous state having neither independent shape nor volume and being able to expand indefinitely atmosphere - the envelope of gases surrounding any celestial body argonon, inert gas, noble gas - any of the chemically inert gaseous elements of the helium group in the periodic table atomic number 17, chlorine, Cl - a common nonmetallic element belonging to the halogens; best known as a heavy yellow irritating toxic gas; used to purify water and as a bleaching agent and disinfectant; occurs naturally only as a salt (as in sea water) atomic number 9, fluorine, F - a nonmetallic univalent element belonging to the halogens; usually a yellow irritating toxic flammable gas; a powerful oxidizing agent; recovered from fluorite or cryolite or fluorapatite atomic number 1, H, hydrogen - a nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas; the simplest and lightest and most abundant element in the universe atomic number 7, N, nitrogen - a common nonmetallic element that is normally a colorless odorless tasteless inert diatomic gas; constitutes 78 percent of the atmosphere by volume; a constituent of all living tissues atomic number 8, O, oxygen - a nonmetallic bivalent element that is normally a colorless odorless tasteless nonflammable diatomic gas; constitutes 21 percent of the atmosphere by volume; the most abundant element in the earth's crust butane - occurs in natural gas; used in the manufacture of rubber and fuels propane - colorless gas found in natural gas and petroleum; used as a fuel afterdamp - a toxic mixture of gases (including carbon dioxide and carbon monoxide and nitrogen) after an explosion of firedamp in a mine firedamp - a mixture of gases (mostly methane) that form in coal mines and become explosive when mixed with air arsine - a poisonous colorless flammable gas used in organic synthesis and to dope transistors and as a poison gas in warfare nitrogen dioxide - a highly poisonous brown gas (NO2) nitric oxide - a poisonous red-brown gas (NO) blow gas, blowing gas - the gas leaving a generator during a blow period butene, butylene - any of three isomeric hydrocarbons C4H8; all used in making synthetic rubbers cyanogen - a colorless toxic gas with a pungent almond odor; has been used in chemical warfare exhaust, exhaust fumes, fumes - gases ejected from an engine as waste products air - a mixture of gases (especially oxygen) required for breathing; the stuff that the wind consists of; "air pollution"; "a smell of chemicals in the air"; "open a window and let in some air"; "I need some fresh air" compressed gas - gas at a high pressure that can be used as a propellant ethene, ethylene - a flammable colorless gaseous alkene; obtained from petroleum and natural gas and used in manufacturing many other chemicals; sometimes used as an anesthetic air gas, producer gas - a gas made of carbon monoxide and hydrogen and nitrogen; made by passing air over hot coke formaldehyde, methanal - a colorless poisonous gas; made by the oxidation of methanol greenhouse emission, greenhouse gas - a gas that contributes to the greenhouse effect by absorbing infrared radiation bottled gas, liquefied petroleum gas - hydrocarbon gases, usually propane or butane, kept under pressure water gas - a mixture of hydrogen and carbon monoxide with small amounts of other gases; made by blowing steam over hot coke or coal ideal gas, perfect gas - a hypothetical gas with molecules of negligible size that exert no intermolecular forces inhalant - something that is inhaled fluid - continuous amorphous matter that tends to flow and to conform to the outline of its container: a liquid or a gas methane - a colorless odorless gas used as a fuel ozone - a colorless gas (O3) soluble in alkalis and cold water; a strong oxidizing agent; can be produced by electric discharge in oxygen or by the action of ultraviolet radiation on oxygen in the stratosphere (where it acts as a screen for ultraviolet radiation) phosgene - a colorless poisonous gas that smells like new-mown hay; used in chemical warfare phosphine - a colorless gas with a strong fishy smell; used as a pesticide poison gas - a gas that is poisonous to breath or contact; used in chemical warfare propene, propylene - a flammable gas obtained by cracking petroleum; used in organic synthesis
	3.	gas - a volatile flammable mixture of hydrocarbons (hexane and heptane and octane etc.) derived from petroleum; used mainly as a fuel in internal-combustion engines gasolene, gasoline, petrol gasohol - a gasoline substitute consisting of 90% gasoline and 10% grain alcohol from corn leaded gasoline, leaded petrol - gasoline treated with a lead compound to reduce motor knocks; "combustion of leaded gasoline released lead into the air where it could cause lead poisoning" fuel - a substance that can be consumed to produce energy; "more fuel is needed during the winter months"; "they developed alternative fuels for aircraft" hydrocarbon - an organic compound containing only carbon and hydrogen napalm - gasoline jelled with aluminum soaps; highly incendiary liquid used in fire bombs and flamethrowers unleaded gasoline, unleaded petrol - gasoline that has not been treated with a lead compound
	4.	gas - a state of excessive gas in the alimentary canal flatulence, flatulency physical condition, physiological condition, physiological state - the condition or state of the body or bodily functions
	5.	gas - a pedal that controls the throttle valve; "he stepped on the gas" accelerator, accelerator pedal, gas pedal, throttle, gun aeroplane, airplane, plane - an aircraft that has a fixed wing and is powered by propellers or jets; "the flight was delayed due to trouble with the airplane" auto, automobile, car, motorcar, machine - a motor vehicle with four wheels; usually propelled by an internal combustion engine; "he needs a car to get to work" foot lever, foot pedal, treadle, pedal - a lever that is operated with the foot
	6.	gas - a fossil fuel in the gaseous state; used for cooking and heating homes natural gas fossil fuel - fuel consisting of the remains of organisms preserved in rocks in the earth's crust with high carbon and hydrogen content methane - a colorless odorless gas used as a fuel
Verb	1.	gas - attack with gas; subject to gas fumes; "The despot gassed the rebellious tribes" attack, assail - launch an attack or assault on; begin hostilities or start warfare with; "Hitler attacked Poland on September 1, 1939 and started World War II"; "Serbian forces assailed Bosnian towns all week" teargas - attack with teargas; subject to teargas fumes; "The students were teargassed during the riot"
	2.	gas - show off boast, brag, gasconade, shoot a line, vaunt, tout, bluster, swash, blow puff - speak in a blustering or scornful manner; "A puffing kind of man" exaggerate, hyperbolise, hyperbolize, overstate, amplify, magnify, overdraw - to enlarge beyond bounds or the truth; "tended to romanticize and exaggerate this `gracious Old South' imagery" crow, gloat, triumph - dwell on with satisfaction