furthest - adjective

• (comparatives of `far') most remote in space or time or order

furthest - adverb

• to the greatest degree or extent or most advanced stage (`furthest' is used more often than `farthest' in this abstract sense)
• to the greatest distance in space or time (`farthest' is used more often than `furthest' in this physical sense)

furthest - thesaurus

farthermost   farthest   furthermost   utmost   uttermost