Source : Webster's Revised Unabridged Dictionary (1913)

Gray \Gray\, a. [Compar. {Grayer}; superl. {Grayest}.] [OE.
   gray, grey, AS. gr[=ae]g, gr[=e]g; akin to D. graauw, OHG.
   gr[=a]o, G. grau, Dan. graa, Sw. gr[*a], Icel. gr[=a]r.]
   [Written also {grey}.]
   1. White mixed with black, as the color of pepper and salt,
      or of ashes, or of hair whitened by age; sometimes, a dark
      mixed color; as, the soft gray eye of a dove.

            These gray and dun colors may be also produced by
            mixing whites and blacks.             --Sir I.
                                                  Newton.

   2. Gray-haired; gray-headed; of a gray color; hoary.

   3. Old; mature; as, gray experience. Ames.

   {Gray antimony} (Min.), stibnite.

   {Gray buck} (Zo["o]l.), the chickara.

   {Gray cobalt} (Min.), smaltite.

   {Gray copper} (Min.), tetrahedrite.

   {Gray duck} (Zo["o]l.), the gadwall; also applied to the
      female mallard.

   {Gray falcon} (Zo["o]l.) the peregrine falcon.

   {Gray Friar}. See {Franciscan}, and {Friar}.

   {Gray hen} (Zo["o]l.), the female of the blackcock or black
      grouse. See {Heath grouse}.

   {Gray mill or millet} (Bot.), a name of several plants of the
      genus {Lithospermum}; gromwell.

   {Gray mullet} (Zo["o]l.) any one of the numerous species of
      the genus {Mugil}, or family {Mugilid[ae]}, found both in
      the Old World and America; as the European species ({M.
      capito}, and {M. auratus}), the American striped mullet
      ({M. albula}), and the white or silver mullet ({M.
      Braziliensis}). See {Mullet}.

   {Gray owl} (Zo["o]l.), the European tawny or brown owl
      ({Syrnium aluco}). The great gray owl ({Ulula cinerea})
      inhabits arctic America.

   {Gray parrot} (Zo["o]l.), a parrot ({Psittacus erithacus}),
      very commonly domesticated, and noted for its aptness in
      learning to talk.

   {Gray pike}. (Zo["o]l.) See {Sauger}.

   {Gray snapper} (Zo["o]l.), a Florida fish; the sea lawyer.
      See {Snapper}.

   {Gray snipe} (Zo["o]l.), the dowitcher in winter plumage.

   {Gray whale} (Zo["o]l.), a rather large and swift California
      whale ({Rhachianectes glaucus}), formerly taken in large
      numbers in the bays; -- called also {grayback},
      {devilfish}, and {hardhead}.

Gray \Gray\, n.
   1. A gray color; any mixture of white and black; also, a
      neutral or whitish tint.

   2. An animal or thing of gray color, as a horse, a badger, or
      a kind of salmon.

            Woe worth the chase, woe worth the day. That coats
            thy life, my gallant gray.            --Sir W.
                                                  Scott.

Source : WordNet®

gray
     adj 1: an achromatic color of any lightness between the extremes of
            black and white; "gray flannel suit"; "hair just
            turning gray" [syn: {grey}, {grayish}, {greyish}]
     2: showing characteristics of age, especially having gray or
        white hair; "whose beard with age is hoar"-Coleridge;
        "nodded his hoary head" [syn: {grey}, {gray-haired}, {grey-haired},
         {gray-headed}, {grey-headed}, {grizzly}, {hoar}, {hoary},
         {white-haired}]
     3: darkened with overcast; "a dark day"; "a dull sky"; "a gray
        rainy afternoon"; "gray clouds"; "the sky was leaden and
        thick" [syn: {dull}, {grey}, {leaden}]
     4: used to signify the Confederate forces in the Civil War (who
        wore gray uniforms); "a stalwart gray figure" [syn: {grey}]
     5: intermediate in character or position; "a gray area between
        clearly legal and strictly illegal" [syn: {grey}]

gray
     v 1: make gray; "The painter decided to grey the sky" [syn: {grey}]
     2: turn gray; "Her hair began to gray" [syn: {grey}]

gray
     n 1: a neutral achromatic color midway between white and black
          [syn: {grayness}, {grey}, {greyness}]
     2: gray clothing; "he was dressed in gray" [syn: {grey}]
     3: any organization or party whose uniforms or badges are gray;
        "the Confederate army was a vast gray" [syn: {grey}]
     4: horse of a light grey or whitish color
     5: English poet best known for his elegy written in a country
        church-yard (1716-1771) [syn: {Thomas Gray}]
     6: American navigator who twice circumnavigated the globe and
        who discovered the Columbia River (1755-1806) [syn: {Robert
        Gray}]
     7: United States botanist who specialized in North American
        flora and who was an early supporter of Darwin's theories
        of evolution (1810-1888) [syn: {Asa Gray}]

Source : Free On-Line Dictionary of Computing

Gray
     
        A {parser generator} written in {Forth} by Martin Anton Ertl
        .  Gray takes grammars in an
        {extended BNF} and produces executable Forth code for
        {recursive descent parser}s.  There is no special support for
        error handling.  Version 3 runs under {Tile Forth} Release 2
        by Mikael Patel.
     
        (1992-05-22)