The Collaborative International Dictionary of English v.0.48:

Fork \Fork\, v. i. [imp. & p. p. Forked; p. pr. & vb. n.
   Forking.]
   1. To shoot into blades, as corn.
      [1913 Webster]

            The corn beginneth to fork.           --Mortimer.
      [1913 Webster]

   2. To divide into two or more branches; as, a road, a tree,
      or a stream forks.
      [1913 Webster]

WordNet (r) 3.0 (2006):

forking
    n 1: the place where something divides into branches [syn:
         furcation, forking]
    2: the act of branching out or dividing into branches [syn:
       branching, ramification, fork, forking]