The Collaborative International Dictionary
Bond servant
bond-servant \bond-servant\, Bond servant \Bond" serv`ant\ A slave; one who is bound to service without wages.
If thy brother . . . be waxen poor, and be sold unto
thee; thou shalt not compel him to serve as a bond
servant: but as an hired servant.
--Lev. xxv.
39, 40.
WordNet
bond servant
n. someone bound to labor without wages
Usage examples of "bond servant".
Appropriately enough, our bond servant's name was Juan, the same as the printer of the first book in New Spain.
He's a bond servant, so far as anyone knows, and only freemen are obliged to join the militia.