gas
     n 1: 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
     2: a fluid in the gaseous state having neither independent
        shape nor volume and being able to expand indefinitely
     3: a volatile flammable mixture of hydrocarbons (hexane and
        heptane and octane etc.) derived from petroleum; used
        mainly as a fuel in internal-combustion engines [syn: {gasoline},
         {gasolene}, {petrol}]
     4: a state of excessive gas in the alimentary canal [syn: {flatulence},
         {flatulency}]
     5: a pedal that controls the throttle valve; "he stepped on the
        gas" [syn: {accelerator}, {accelerator pedal}, {gas pedal},
         {throttle}, {gun}]
     6: a fossil fuel in the gaseous state; used for cooking and
        heating homes [syn: {natural gas}]
     v 1: attack with gas; subject to gas fumes; "The despot gassed
          the rebellious tribes"
     2: show off [syn: {boast}, {tout}, {swash}, {shoot a line}, {brag},
         {blow}, {bluster}, {vaunt}, {gasconade}]
     [also: {gassing}, {gasses}, {gassed}, {gasses} (pl)]
Source: WordNet® 2.0

gas [as in `gas chamber'] 1. interj. A term of disgust and hatred,
   implying that gas should be dispensed in generous quantities, thereby
   exterminating the source of irritation. "Some loser just reloaded the
   system for no reason! Gas!" 2. interj. A suggestion that someone or
   something ought to be flushed out of mercy. "The system's getting
   {wedged} every few minutes. Gas!" 3. vt. To {flush} (sense 1). "You
   should gas that old crufty software." 4. [IBM] n. Dead space in
   nonsequentially organized files that was occupied by data that has since
   been deleted; the compression operation that removes it is called
   `degassing' (by analogy, perhaps, with the use of the same term in
   vacuum technology). 5. [IBM] n. Empty space on a disk that has been
   clandestinely allocated against future need.


Source: The Jargon File