From WordNet (r) 2.0 (August 2003) [wn]:
unfinished
adj 1: not brought to the desired final state [ant: finished]
2: not brought to an end or conclusion; "unfinished business";
"the building is still unfinished" [ant: finished]
3: lacking a surface finish such as paint; "bare wood";
"unfinished furniture" [syn: bare]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Unfinished \Un*fin"ished\, a.
Not finished, not brought to an end; imperfect; incomplete;
left in the rough; wanting the last hand or touch; as, an
unfinished house; an unfinished picture; an unfinished iron
casting.
[1913 Webster]