1 more, additional, another, other, new, supplemental, supplementary, accessory, auxiliary, extra, spare, fresh:
Further investment by our group is out of the question.
2 farther, more distant or remote:
Some day, we may travel to the further reaches of the galaxy.
3 furthermore, besides, moreover, too, also, additionally, in addition, over and above, beyond, above, what is more, to boot, yet, then (again), again:
She told him he was rude and, further, ugly as well.
4 farther, at or to a greater distance or depth:
She has looked into the matter much further than I.
5 advance, promote, favour, push or urge onward(s) or forward(s), forward, foster, back, patronize, support, help, assist, aid:
What can I do to further your efforts?