Source : Webster's Revised Unabridged Dictionary (1913)

Enslavement \En*slave"ment\, n.
   The act of reducing to slavery; state of being enslaved;
   bondage; servitude.

         A fresh enslavement to their enemies.    --South.

Source : WordNet®

enslavement
     n 1: the state of being a slave; "So every bondman in his own
          hand bears the power to cancel his
          captivity"--Shakespeare [syn: {captivity}]
     2: the act of making slaves of your captives