Source : Webster's Revised Unabridged Dictionary (1913)

Tool \Tool\ (t[=oo]l), v. i. [Cf. {Tool}, v. t., 2.]
   To travel in a vehicle; to ride or drive. [Colloq.]

         Boys on their bicycles tooling along the well-kept
         roads.                                   --Illust.
                                                  American.

Tool \Tool\, v. t. [imp. & p. p. {tooled}; p. pr. & vb. n.
   {tooling}.]
   1. To shape, form, or finish with a tool. ``Elaborately
      tooled.'' --Ld. Lytton.

   2. To drive, as a coach. [Slang, Eng.]

Tool \Tool\, n. [OE. tol,tool. AS. t[=o]l; akin to Icel. t[=o]l,
   Goth. taijan to do, to make, taui deed, work, and perhaps to
   E. taw to dress leather. [root]64.]
   1. An instrument such as a hammer, saw, plane, file, and the
      like, used in the manual arts, to facilitate mechanical
      operations; any instrument used by a craftsman or laborer
      at his work; an implement; as, the tools of a joiner,
      smith, shoe-maker, etc.; also, a cutter, chisel, or other
      part of an instrument or machine that dresses work.

   2. A machine for cutting or shaping materials; -- also called
      {machine tool}.

   3. Hence, any instrument of use or service.

            That angry fool . . . Whipping her horse, did with
            his smarting tool Oft whip her dainty self.
                                                  --Spenser.

   4. A weapon. [Obs.]

            Him that is aghast of every tool.     --Chaucer.

   5. A person used as an instrument by another person; -- a
      word of reproach; as, men of intrigue have their tools, by
      whose agency they accomplish their purposes.

            I was not made for a minion or a tool. --Burks.

Source : WordNet®

tool
     n 1: an implement used in the practice of a vocation
     2: the means whereby some act is accomplished; "my greed was
        the instrument of my destruction"; "science has given us
        new tools to fight disease" [syn: {instrument}]
     3: a person who is controlled by others and is used to perform
        unpleasant or dishonest tasks for someone else [syn: {creature},
         {puppet}]
     4: obscene terms for penis [syn: {cock}, {prick}, {dick}, {shaft},
         {pecker}, {peter}, {putz}]

tool
     v 1: drive; "The convertible tooled down the street"
     2: ride in a car with no particular goal and just for the
        pleasure of it; "We tooled down the street" [syn: {joyride},
         {tool around}]
     3: furnish with tools
     4: work with a tool

Source : Free On-Line Dictionary of Computing

tool
     
        1.  A program used primarily to create, manipulate,
        modify, or analyse other programs, such as a compiler or an
        editor or a cross-referencing program.  Opposite: {app},
        {operating system}.
     
        2. A {Unix} {application program} with a simple, "transparent"
        (typically text-stream) interface designed specifically to be
        used in programmed combination with other tools (see {filter},
        {plumbing}).
     
        3.  ({MIT}: general to students there) To work; to
        study (connotes tedium).  The {TMRC} Dictionary defined this
        as "to set one's brain to the grindstone".  See {hack}.
     
        4.  ({MIT}) A student who studies too much and
        hacks too little.  MIT's student humour magazine rejoices in
        the name "Tool and Die".
     
        [{Jargon File}]
     
        (1996-12-12)