noun

• (figuratively) A drudge; one who labors or is obliged (e.g. by prior contract) to labor like a slave with limited rights, e.g. an indentured servant.
• (figuratively) An abject person.
  "Art thou the ſlaue that with thy breath haſt kill'd / Mine innocent child?"
• (figuratively) One who has no power of resistance to something, one who surrenders to or is under the domination of something.
  "a slave to passion, to strong drink, or to ambition"
• (BDSM) A submissive partner in a BDSM relationship who consensually submits to, sexually or personally, serving one or more masters or mistresses.
  "In the clip the black female “slave” dons a chain around her neck for which her white mistress possesses the key. The black woman sub is further disciplined by the power of speech—the force of silence."

verb

• (intransitive) To work hard.
  "I was slaving all day over a hot stove."
• (transitive) To place a device under the control of another.
  "to slave a hard disk"