Source : Webster's Revised Unabridged Dictionary (1913)

Gang \Gang\, v. i. [AS. gangan, akin to OS. & OHG. gangan, Icel.
   ganga, Goth. gaggan; cf. Lith. ?engti to walk, Skr. ja?gha
   leg. [root]48. Cf. {Go}.]
   To go; to walk.

   Note: Obsolete in English literature, but still used in the
         North of England, and also in Scotland.

Gang \Gang\, n. [Icel. gangr a going, gang, akin to AS., D., G.,
   & Dan. gang a going, Goth. gaggs street, way. See {Gang}, v.
   i.]
   1. A going; a course. [Obs.]

   2. A number going in company; hence, a company, or a number
      of persons associated for a particular purpose; a group of
      laborers under one foreman; a squad; as, a gang of
      sailors; a chain gang; a gang of thieves.

   3. A combination of similar implements arranged so as, by
      acting together, to save time or labor; a set; as, a gang
      of saws, or of plows.

   4. (Naut.) A set; all required for an outfit; as, a new gang
      of stays.

   5. [Cf. {Gangue}.] (Mining) The mineral substance which
      incloses a vein; a matrix; a gangue.

   {Gang board}, or {Gang plank}. (Naut.)
      (a) A board or plank, with cleats for steps, forming a
          bridge by which to enter or leave a vessel.
      (b) A plank within or without the bulwarks of a vessel's
          waist, for the sentinel to walk on.

   {Gang cask}, a small cask in which to bring water aboard
      ships or in which it is kept on deck.

   {Gang cultivator}, {Gang plow}, a cultivator or plow in which
      several shares are attached to one frame, so as to make
      two or more furrows at the same time.

   {Gang days}, Rogation days; the time of perambulating
      parishes. See {Gang week} (below).

   {Gang drill}, a drilling machine having a number of drills
      driven from a common shaft.

   {Gang master}, a master or employer of a gang of workmen.

   {Gang plank}. See {Gang board} (above).

   {Gang plow}. See {Gang cultivator} (above).

   {Gang press}, a press for operating upon a pile or row of
      objects separated by intervening plates.

   {Gang saw}, a saw fitted to be one of a combination or gang
      of saws hung together in a frame or sash, and set at fixed
      distances apart.

   {Gang tide}. See {Gang week} (below).

   {Gang tooth}, a projecting tooth. [Obs.] --Halliwell.

   {Gang week}, Rogation week, when formerly processions were
      made to survey the bounds of parishes. --Halliwell.

   {Live gang}, or {Round gang}, the Western and the Eastern
      names, respectively, for a gang of saws for cutting the
      round log into boards at one operation. --Knight.

   {Slabbing gang}, an arrangement of saws which cuts slabs from
      two sides of a log, leaving the middle part as a thick
      beam.

Source : WordNet®

gang
     n 1: an association of criminals; "police tried to break up the
          gang"; "a pack of thieves" [syn: {pack}, {ring}, {mob}]
     2: an informal body of friends; "he still hangs out with the
        same crowd" [syn: {crowd}, {crew}, {bunch}]
     3: an organized group of workmen [syn: {crew}, {work party}]
     4: tool consisting of a combination of implements arranged to
        work together

gang
     v : act as an organized group [syn: {gang up}]