One who is owned as the property of someone else, especially in involuntary servitude.
2. One who is subservient to or controlled by another: his boss's slave.
3. One who is subject to or controlled by a specified influence: a slave to alcohol; a slave to an irrational fear.
4. One who works extremely hard.
5. One who acts out the role of the submissive partner in a sadomasochistic relationship.
6. A slave ant.
7. A machine or component controlled by another machine or component