hold hostage

Meanings

1. To hold as hostage.
2. To have possession or custody of (a person) as security for performance against a treaty, a pledge, or a demand, especially now an extra-legal demand.
3. To seek advantage in a situation by threatening the well-being or success of (a person or thing not directly involved in the situation).
4. To sabotage (a computer) with intent to blackmail the owner.
5. To hold in custody or use for any advantage.