kept in prison or in a place that you are not allowed to leave

被关押的，遭监禁的:

captive soldiers

被俘的士兵

captive animals

被关住的动物

His son had been taken captive (=became a prisoner) during the raid.

他的儿子在这次突袭中被劫持了。

a pilot who was held captive (=kept as a prisoner) for six years

被关押了六年的飞行员

captive audience, people who listen or watch someone or something because they have to, not because they are interested

受制的听众（观众）

captive market, the people who must buy a particular product or service, because they need it and there is only one company selling it

专属市场，垄断市场

be captive to sth, to be unable to think or speak freely, because of being influenced too much by something

受某物禁锢，受某物影响而无法摆脱:

Our communities should not be captive to the mistakes of the past.

我们的社会不应受制于过去犯下的错误。

someone who is kept as a prisoner, especially in a war

囚徒，战俘，俘虏