The Collaborative International Dictionary of English v.0.48:

Ash \Ash\, n.,
   sing. of Ashes.
   [1913 Webster]

   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.
         [1913 Webster]

   Bone ash, burnt powered; bone earth.

   Volcanic ash. See under Ashes.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

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 (Fraxinus Americana).
      [1913 Webster]

   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.
      [1913 Webster]

   2. The tough, elastic wood of the ash tree.
      [1913 Webster]

   Note: Ash is used adjectively, or as the first part of a
         compound term; as, ash bud, ash wood, ash tree, etc.
         [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Ash \Ash\, v. t.
   To strew or sprinkle with ashes. --Howell.
   [1913 Webster]

WordNet (r) 3.0 (2006):

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, 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
    v 1: convert into ashes

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

ash

    A Bourne Shell clone by Kenneth Almquist comparable
   with 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)