Source : Webster's Revised Unabridged Dictionary (1913)

Switch \Switch\, v. t. [imp. & p. p. {Switched}; p. pr. & vb. n.
   {Switching}.]
   1. To strike with a switch or small flexible rod; to whip.
      --Chapman.

   2. To swing or whisk; as, to switch a cane.

   3. To trim, as, a hedge. [Prov. Eng.] --Halliwell.

   4. To turn from one railway track to another; to transfer by
      a switch; -- generally with off, from, etc.; as, to switch
      off a train; to switch a car from one track to another.

   5. (Eccl.) To shift to another circuit.

Switching \Switch"ing\,
   a. & n. from {Switch}, v.

   {Switching engine}, a locomotive for switching cars from one
      track to another, and making up trains; -- called also
      {switch engine}. [U.S.]

Source : WordNet®

switching
     n : the act of changing one thing or position for another; "his
         switch on abortion cost him the election" [syn: {switch},
          {shift}]