adjective (comparatives of `far') most remote in space or time or order.
— synonyms: farthermost, furthermost, furthest, utmost, uttermost
adverb to the greatest distance in space or time (`farthest' is used more often than `furthest' in this physical sense).
— synonyms: furthest
adverb to the greatest degree or extent or most advanced stage (`furthest' is used more often than `farthest' in this abstract sense).
— synonyms: furthest