Meaning : (comparatives of `far') most remote in space or time or order.
Example :
Had traveled to the farthest frontier.
Don't go beyond the farthermost (or furthermost) tree.
Explored the furthest reaches of space.
The utmost tip of the peninsula.
Synonyms : farthermost, farthest, furthermost, utmost, uttermost
Meaning : To the greatest degree or extent or most advanced stage (`furthest' is used more often than `farthest' in this abstract sense).
Example :
Went the furthest of all the children in her education.
Furthest removed from reality.
She goes farthest in helping us.
Synonyms : farthest
Meaning : To the greatest distance in space or time (`farthest' is used more often than `furthest' in this physical sense).
Example :
See who could jump the farthest.
Chose the farthest seat from the door.
He swam the furthest.
Synonyms : farthest