pathway

noun3

1. •
   A footpath or other path or track.

   • YOU WILL REMEMBER there was no road—not even a pathway—between the castle of the Wicked Witch and the Emerald City. — 1900
2. •
   (figurative) A course of action.
3. •
   A sequence of biochemical compounds, and the reactions linking them, that describe a process in metabolism or catabolism.