The adj farther has 2 senses (first 2 from tagged texts)
1. (2) farther -- (more distant in especially space or time; "they live in the farther house")
2. (1) further, farther -- (more distant in especially degree; "nothing could be further from the truth"; "further from our expectations"; "farther from the truth"; "farther from our expectations")
Overview of adv farther
The adv farther has 2 senses (first 2 from tagged texts)
1. (3) further, farther -- (to or at a greater extent or degree or a more advanced stage (`further' is used more often than `farther' in this abstract sense); "further complicated by uncertainty about the future"; "let's not discuss it further"; "nothing could be further from the truth"; "they are further along in their research than we expected"; "the application of the law was extended farther"; "he is going no farther in his studies")
2. (2) farther, further -- (to or at a greater distance in time or space (`farther' is used more frequently than `further' in this physical sense); "farther north"; "moved farther away"; "farther down the corridor"; "the practice may go back still farther to the Druids"; "went only three miles further"; "further in the future")
Overview of adv far
The adv far has 5 senses (first 4 from tagged texts)
1. (62) far -- (to a considerable degree; very much; "a far far better thing that I do"; "felt far worse than yesterday"; "eyes far too close together")
2. (39) far -- (at or to or from a great distance in space; "he traveled far"; "strayed far from home"; "sat far away from each other")
3. (22) far -- (at or to a certain point or degree; "I can only go so far before I have to give up"; "how far can we get with this kind of argument?")
4. (3) far -- (remote in time; "if we could see far into the future"; "all that happened far in the past")
5. far -- (to an advanced stage or point; "a young man who will go very far")