/ ˈfɑːðə(r); NAmE ˈfɑːrð-/ adverb , adjective
■ adverb
(comparative of far ) at or to a greater distance in space or time :
farther north / south
farther along the road
I can't go any farther .
As a family we grew farther and farther apart.
We watched their ship moving gradually farther away .
How much farther is it?
They hadn't got any farther with the work (= they had made no progress)
•
IDIOMS
see afield
■ adjective
(comparative of far ) at a greater distance in space, direction or time :
the farther shore of the lake
••
WHICH WORD
farther / further / farthest / furthest
These are the comparative and superlative forms of far .
To talk about distance, use either farther, farthest or further, furthest . In BrE , further , furthest are the most common forms and in NAmE , further and farthest :
I have to travel further / farther to work now.
To talk about the degree or extent of something, further / furthest are usually preferred:
Let's consider this point further.
Further , but not farther , can also mean 'more' or 'additional':
Are there any further questions?
This sounds very formal in NAmE .