Source : Webster's Revised Unabridged Dictionary (1913)

Bondage \Bond"age\, n. [LL. bondagium. See {Bond}, a.]
   1. The state of being bound; condition of being under
      restraint; restraint of personal liberty by compulsion;
      involuntary servitude; slavery; captivity.

            The King, when he designed you for my guard,
            Resolved he would not make my bondage hard.
                                                  --Dryden.

   2. Obligation; tie of duty.

            He must resolve by no means to be . . . brought
            under the bondage of onserving oaths. --South.

   3. (Old Eng. Law) Villenage; tenure of land on condition of
      doing the meanest services for the owner.

   Syn: Thralldom; bond service; imprisonment.

Source : WordNet®

bondage
     n 1: the state of being under the control of another person [syn:
           {slavery}, {thrall}, {thralldom}, {thraldom}]
     2: sexual practice that involves physically restraining (by
        cords or handcuffs) one of the partners