A Slave

1. A person who is the property of another person and whose labor (and sometimes also whose life) is subject to the owner's volition.
2. A person who is legally obliged by prior contract (oral or written) to work for another, with contractually limited rights to bargain; an indentured servant.
3. A drudge; one who labours like a slave.
4. One who has lost the power of resistance; one who surrenders to something.
5. An abject person.
6. A submissive partner in a BDSMrelationship who (consensually) submits to (sexually and/or personally) serving one or more masters or mistresses.
7. A person who is forced against their will to perform, for another person or group, sexual acts or services on a regular or continuing basis.
8. (engineering) A device that is controlled by another device.