n.[U]

1. 奴役（状态）；束缚
   They spent their lives in servitude.

   他们一辈子过着被奴役的生活。

2. （作为刑罚的）劳役，苦役
3. 【律】役权；地役权

n.

1. the state of being a slave or completely subject to someone more powerful.
2. Law,  archaic the subjection of property to an easement.