bondage

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. The state of one who is bound as a slave or serf.
2. n. A state of subjection to a force, power, or influence.
3. n. The practice of being physically restrained, as with cords or handcuffs, as a means of attaining sexual gratification.
4. n. Villeinage.

Century Dictionary and Cyclopedia

1. n. In old English law, villeinage; tenure of land by performing the meanest services for a superior.
2. n. In Scot. agri., the state of, or services due by, a bondager. See bondager.
3. n. [From the foregoing extract it will be seen that formerly the system had place not only, as now, between farmer and laborer, but also between proprietor and farmer.]
4. n. Obligation; tie of duty; binding power or influence.
5. n. Slavery or involuntary servitude; serfdom.
6. n. Captivity; imprisonment; restraint of a person's liberty by compulsion.
7. n. Figuratively, subjection to some power or influence: as, he is in bondage to his appetites. Synonyms Slavery, etc. (see servitude), thraldom, serfdom.
8. To reduce to bondage or slavery; enslave.

Wiktionary

1. n. The state of being enslaved or the practice of slavery.
2. n. The state of lacking freedom; constraint.
3. n. The practice of tying people up for sexual pleasure.

GNU Webster's 1913

1. n. The state of being bound; condition of being under restraint; restraint of personal liberty by compulsion; involuntary servitude; slavery; captivity.
2. n. Obligation; tie of duty.
3. n. Villenage; tenure of land on condition of doing the meanest services for the owner.

WordNet 3.0

1. n. the state of being under the control of another person
2. n. the state of being under the control of a force or influence or abstract power
3. n. sexual practice that involves physically restraining (by cords or handcuffs) one of the partners