Source : Webster's Revised Unabridged Dictionary (1913)

Jig \Jig\, v. t. [imp. & p. p. {Jigged}; p. pr. & vb. n.
   {Jigging}.]
   1. To sing to the tune of a jig.

            Jig off a tune at the tongue's end.   -- Shak.

   2. To trick or cheat; to cajole; to delude. --Ford.

   3. (Mining) To sort or separate, as ore in a jigger or sieve.
      See {Jigging}, n.

   4. (Metal Working) To cut or form, as a piece of metal, in a
      jigging machine.

Jig \Jig\, n. [OF. gigue a stringed instrument, a kind of dance,
   F. gigue dance, tune, gig; of German origin; cf. MHG. g[=i]ge
   fiddle, G. geige. Cf. {Gig} a fiddle, {Gig} a whirligig.]
   1. (Mus.) A light, brisk musical movement.

            Hot and hasty, like a Scotch jib.     -- Shak.

   3. A light, humorous piece of writing, esp. in rhyme; a farce
      in verse; a ballad. [Obs.]

            A jig shall be clapped at, and every rhyme Praised
            and applauded.                        --Beau. & Fl.

   4. A piece of sport; a trick; a prank. [Obs.]

            Is't not a fine jig, A precious cunning, in the late
            Protector?                            -- Beau & Fl.

   5. A trolling bait, consisting of a bright spoon and a hook
      attached.

   6. (Mach.)
      (a) A small machine or handy tool; esp.: (Metal Working) A
          contrivance fastened to or inclosing a piece of work,
          and having hard steel surfaces to guide a tool, as a
          drill, or to form a shield or templet to work to, as
          in filing.
      (b) (Mining) An apparatus or a machine for jigging ore.

   {Drill jig}, a jig for guiding a drill. See {Jig}, 6
      (a) .

   {Jig drilling}, {Jig filing} (Metal Working), a process of
      drilling or filing in which the action of the tool is
      directed or limited by a jig.

   {Jig saw}, a sawing machine with a narrow, vertically
      reciprocating saw, used to cut curved and irregular lines,
      or ornamental patterns in openwork, a scroll saw; --
      called also {gig saw}.

Jig \Jig\, v. i.
   To dance a jig; to skip about.

         You jig, you amble, and you lisp.        -- Shak.

Jig \Jig\, v. i.
   To move with a skip or rhythm; to move with vibrations or
   jerks.

         The fin would jig off slowly, as if it were looking for
         nothing at all.                          --Kipling.

Source : WordNet®

jig
     n 1: music in three-four time for dancing a jig
     2: any of various old rustic dances involving kicking and
        leaping
     [also: {jigging}, {jigged}]

jig
     v : dance a quick dance with leaping and kicking motions
     [also: {jigging}, {jigged}]