slave

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun One who is owned as the property of someone else, especially in involuntary servitude.
• noun One who is subservient to or controlled by another.
• noun One who is subject to or controlled by a specified influence.
• noun One who works extremely hard.
• noun One who acts out the role of the submissive partner in a sadomasochistic relationship.
• noun A slave ant.
• noun A machine or component controlled by another machine or component.
• intransitive verb To work very hard or doggedly; toil.
• intransitive verb To trade in or transport slaves.
• intransitive verb To cause a machine or component to be controlled by another machine or component.

from The Century Dictionary.

• To work like a slave; toil; drudge: as, to slave night and day for a miserable living.
• To enslave.
• See Slav.
• noun A person who is the chattel or property of another and is wholly subject to his will; a bond-servant; a serf. See slavery.
• noun One who has lost the power of resistance and is entirely under the influence or domination of some habit or vice: as, a slave to ambition; a slave of drink.
• noun One who labors like a slave; a drudge: as, a slave to the desk.
• noun An abject wretch; a mean, servile person.
• noun In entomology, an insect held captive by or made to work for another, as in some colonies of ants. See slave-making.
• noun Synonyms Serf, Slave (see serf), bondman, thrall. See servitude.
• Performed by slaves: as, slave labor.
• Containing or holding slaves: as, a slave State.

from the GNU version of the Collaborative International Dictionary of English.

• transitive verb To enslave.
• noun See Slav.
• intransitive verb To drudge; to toil; to labor as a slave.
• noun A person who is held in bondage to another; one who is wholly subject to the will of another; one who is held as a chattel; one who has no freedom of action, but whose person and services are wholly under the control of another.
• noun One who has lost the power of resistance; one who surrenders himself to any power whatever.
• noun A drudge; one who labors like a slave.
• noun An abject person; a wretch.
• noun (Zoöl.) any species of ants which is captured and enslaved by another species, especially Formica fusca of Europe and America, which is commonly enslaved by Formica sanguinea.
• noun one who attempted to catch and bring back a fugitive slave to his master.
• noun part of the western coast of Africa to which slaves were brought to be sold to foreigners.
• noun one who superintends slaves at their work; hence, figuratively, a cruel taskmaster.
• noun A search after fugitive slaves, often conducted with bloodhounds.
• noun a vessel employed in the slave trade or used for transporting slaves; a slaver.
• noun the business of dealing in slaves, especially of buying them for transportation from their homes to be sold elsewhere.
• noun one who traffics in slaves.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A person who is the property of another person and whose labor and also whose life often is subject to the owner's volition.
• noun 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.
• noun A person who is forced against his/her will to perform, for another person or other persons, sexual acts or other personal services on a regular or continuing basis.
• noun engineering A device that is controlled by another device.
• verb intransitive To work hard.
• verb transitive To enslave.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a person who is owned by someone
• verb work very hard, like a slave
• noun someone entirely dominated by some influence or person
• noun someone who works as hard as a slave