Source : Webster's Revised Unabridged Dictionary (1913)

Caddie \Cad"die\, n. [Written also {caddy}, {cadie}, {cady}, and
   {cawdy}.] [See {Cadet}.]
   1. A cadet. [Obs. Scot.]

   2. A lad; young fellow. [Scot.] --Burns.

   3. One who does errands or other odd jobs. [Scot.]

   4. An attendant who carries a golf player's clubs, tees his
      ball, etc.

Cadie \Cad"ie\, Caddie \Cad"die\, n.
   A Scotch errand boy, porter, or messenger. [Written also
   {cady}.]

         Every Scotchman, from the peer to the cadie.
                                                  --Macaulay.

Source : WordNet®

caddie
     n : an attendant who carries the golf clubs for a player [syn: {golf
         caddie}]
     v : act as a caddie and carry clubs for a player [syn: {caddy}]
     [also: {caddying}, {caddies}, {caddied}]