Furthest

1. (a.) superl. Most remote; most in advance; farthest. See Further.

2. (adv.) At the greatest distance; farthest.

Thesaurus Entries

at the height, at the limit, extreme, far out, farthermost, farthest, farthest off, furthermost, greatest, most, most distant, outermost, outmost, radical, remotest, too much, ultimate, ultra, ultra-ultra, utmost, uttermost, way out