The Collaborative International Dictionary of English v.0.48:

Gas \Gas\ (g[a^]s), v. t. [imp. & p. p. Gassed (g[a^]st); p.
   pr. & vb. n. Gassing.]
   1. (Textiles) To singe, as in a gas flame, so as to remove
      loose fibers; as, to gas thread.
      [Webster 1913 Suppl.]

   2. To impregnate with gas; as, to gas lime with chlorine in
      the manufacture of bleaching powder.
      [Webster 1913 Suppl.]

   3. to expose to a poisonous or noxious gas "The protest
      threatened to become violent, and the police gassed the
      demonstrators to force them to disperse."
      [PJC]

The Collaborative International Dictionary of English v.0.48:

Gas \Gas\ (g[a^]s), n.; pl. Gases (g[a^]s"[e^]z). [Invented by
   the chemist Van Helmont of Brussels, who died in 1644.]
   1. An a["e]riform 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 a["e]riform state.
      [1913 Webster]

   2. (Popular Usage)
      (a) 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.
      (b) Laughing gas.
      (c) Any irrespirable a["e]riform fluid.
          [1913 Webster]

   3. same as gasoline; -- a shortened form. Also, the
      accelerator pedal of a motor vehicle; used in the term "
      step on the gas".
      [PJC]

   4. the accelerator pedal of a motor vehicle; used in the term
      " step on the gas".
      [PJC]

   5. Same as natural gas.
      [PJC]

   6. an exceptionally enjoyable event; a good time; as, The
      concert was a gas. [slang]
      [PJC]

   Note: Gas is often used adjectively or in combination; as,
         gas fitter or gasfitter; gas meter or gas-meter, etc.
         [1913 Webster]

   Air gas (Chem.), a kind of gas made by forcing air through
      some volatile hydrocarbon, as the lighter petroleums. The
      air is so saturated with combustible vapor as to be a
      convenient illuminating and heating agent.

   Gas battery (Elec.), a form of voltaic battery, in which
      gases, especially hydrogen and oxygen, are the active
      agents.

   Gas carbon, Gas coke, etc. See under Carbon, Coke,
      etc.

   Gas coal, a bituminous or hydrogenous coal yielding a high
      percentage of volatile matters, and therefore available
      for the manufacture of illuminating gas. --R. W. Raymond.

   Gas engine, an engine in which the motion of the piston is
      produced by the combustion or sudden production or
      expansion of gas; -- especially, an engine in which an
      explosive mixture of gas and air is forced into the
      working cylinder and ignited there by a gas flame or an
      electric spark.
      [1913 Webster]

WordNet (r) 3.0 (2006):

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 [syn: gas, gaseous state]
    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, gas, petrol]
    4: a state of excessive gas in the alimentary canal [syn:
       flatulence, flatulency, gas]
    5: a pedal that controls the throttle valve; "he stepped on the
       gas" [syn: accelerator, accelerator pedal, gas pedal,
       gas, throttle, gun]
    6: a fossil fuel in the gaseous state; used for cooking and
       heating homes [syn: natural gas, 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, gas, blow, bluster, vaunt, gasconade]

The Free On-line Dictionary of Computing (19 January 2023):

GNU assembler
gas

   (GAS) A Unix assembler for the GNU project.  Many CPU
   types are handled and COFF and IEEE-695 formats are
   supported as well as standard a.out.

   Current version 2.2 ported to Sun-3, Sun-4, i386,
   386BSD, BSD/386, Linux, PS/2-AIX, VAX, Ultrix,
   BSD, VMS.

   The assembler has been merged with GNU Binutils.

   E-mail: .

   (1995-04-18)


The Jargon File (version 4.4.7, 29 Dec 2003):

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.