Webster's Revised Unabridged Dictionary · 1913

Further

Further , adverb

[A comparative of forth; Old English further, forther, Anglo-Saxon fur{not transcribed}or, far{not transcribed}ur; akin to German furder. See Forth, adv.]

To a greater distance; in addition; moreover. See Farther.
Carries us, I know not how much further, into familiar company. — M. Arnold
They sdvanced us far as Eleusis and Thria; but no further. — Jowett (Thucyd. )
Collocations (1)
Further off , not so near; apart by a greater distance.

Further , a. compar.

1.
More remote; at a greater distance; more in advance; farther; as, the further end of the field. See Farther.
2.
Beyond; additional; as, a further reason for this opinion; nothing further to suggest.

The forms further and farther are in general not differentiated by writers, but further is preferred by many when application to quantity or degree is implied.

Further , transitive verb

[Old English furthren, forthren, Anglo-Saxon fyreran, fyrerian. See Further, adv.]

To help forward; to promote; to advance; to forward; to help or assist.
This binds thee, then, to further my design. — Dryden
I should nothing further the weal public. — Robynsom (More's Utopia)