The Collaborative International Dictionary of English v.0.48:
Forked \Forked\, a.
1. Formed into a forklike shape; having a fork; dividing into
two or more prongs or branches; furcated; bifurcated;
zigzag; as, the forked lighting.
A serpent seen, with forked tongue. --Shak.
2. Having a double meaning; ambiguous; equivocal.
Cross forked (Her.), a cross, the ends of whose arms are
divided into two sharp points; -- called also cross
double fitch['e]. A cross forked of three points is a
cross, each of whose arms terminates in three sharp
Forked counsel, advice pointing more than one way;
ambiguous advice. [Obs.] --B. Jonson. -- Fork"ed*ly,
adv. -- Fork"ed*ness, n.