C2 someone who is taken as a prisoner by an enemy in order to force the other people involved to do what the enemy wants人质
She was taken/held hostage by the gunmen.她被持枪歹徒劫持作人质。
The terrorists have seized 20 hostages and are threatening to kill one a day unless their demands are met.恐怖分子劫持了20名人质,并威胁除非他们的要求得到满足,否则将每天杀掉一名人质。