(comparatives of `far') most remote in space or time or
order; "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" Synonym(s):farthermost, farthest, furthermost, furthest, utmost, uttermost
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
Furthermost \Fur"ther*most"\, a.
Most remote; furthest.