n.(Middle Ages) a person who is bound to the land and owned by the feudal lord
同义词：serfhelot
英汉双解大词典
villein(alsovillain)
1.
N（名词）
(in medieval Europe) a peasant personally bound to his lord, to whom he paid dues and services, sometimes commuted to rents, in return for his land (中世纪欧洲的)农奴