If you describe something such as a work of art or a piece of work as unfinished, you mean that it is not complete, for example because it was abandoned or there was no time to complete it.
Jane Austen's unfinished novel.
简·奥斯汀未写完的小说。
The cathedral was eventually completed in 1490, though the Gothic facade remains unfinished.
大教堂在1490年终于完工,不过其哥特式建筑的正面仍未建好。