Nominally she is the king's prisoner.是什么意思？

Nominally she is the king's prisoner.

名义上她是国王的囚犯。

nominally

adv. 在名义上，表面地，应名儿；

例句
He was nominally Deputy Prime Minister, certainly, but his influence was clearly on the wane...
当然，他名义上是副首相，但是显然他的影响力正在下降。

she

pron. 她，它；

例句
Her lover walked out on her after she had aborted their child.
她的情人在她打掉胎儿后甩了她。

is

vt.& vi. 是（be的三单形式；n. 存在；

例句
Bollinger 'RD' is a rare, highly prized wine.
博林格RD香槟是一种名贵的备受推崇的葡萄酒。

the

art. 指已提到的人（物），指说话人与听者已知的人（物），用于独一无二的事物前，与形容词最高级和序数词连用；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

prisoner

n. 囚犯，犯人，俘虏，刑事被告；

例句
McCain spent five and a half years in a prisoner of war camp in Vietnam.
麦凯恩在越南的战俘营里度过了5年半的时间。