Source : Webster's Revised Unabridged Dictionary (1913)

Ash \Ash\ ([a^]sh), n. [OE. asch, esh, AS. [ae]sc; akin to OHG.
   asc, Sw. & Dan. ask, Icel. askr, D. esch, G. esche.]
   1. (Bot.) A genus of trees of the Olive family, having
      opposite pinnate leaves, many of the species furnishing
      valuable timber, as the European ash ({Fraxinus
      excelsior}) and the white ash ({F. Americana}).

   {Prickly ash} ({Zanthoxylum Americanum}) and {Poison ash}
      ({Rhus venenata}) are shrubs of different families,
      somewhat resembling the true ashes in their foliage.

   {Mountain ash}. See {Roman tree}, and under {Mountain}.

   2. The tough, elastic wood of the ash tree.

   Note: Ash is used adjectively, or as the first part of a
         compound term; as, ash bud, ash wood, ash tree, etc.

Ash \Ash\, n.,
   sing. of {Ashes}.

   Note: Ash is rarely used in the singular except in connection
         with chemical or geological products; as, soda ash,
         coal which yields a red ash, etc., or as a qualifying
         or combining word; as, ash bin, ash heap, ash hole, ash
         pan, ash pit, ash-grey, ash-colored, pearlash, potash.

   {Bone ash}, burnt powered; bone earth.

   {Volcanic ash}. See under {Ashes}.

Ash \Ash\, v. t.
   To strew or sprinkle with ashes. --Howell.

Source : WordNet®

ash
     v : convert into ashes

ash
     n 1: the residue that remains when something is burned
     2: any of various deciduous pinnate-leaved ornamental or timber
        trees of the genus Fraxinus [syn: {ash tree}]
     3: strong elastic wood of any of various ash trees; used for
        furniture and tool handles and sporting goods such as
        baseball bats

Source : Free On-Line Dictionary of Computing

ash
     
         A {Bourne Shell} clone by Kenneth Almquist.  It works
        pretty well.  For running scripts, it is sometimes better and
        sometimes worse than {Bash}.
     
        Ash runs under {386BSD}, {NetBSD}, {FreeBSD}, and {Linux}.
     
        {FTP Linux version
        (ftp://ftp.win.tue.nl/pub/linux/ports/ash-linux-0.1.tar.gz)}.
     
        (1995-07-20)