In England, at least from the reign of Henry II, one
only, and that the inferior species [of villeins],
existed . . . But by the customs of France and Germany,
persons in this abject state seem to have been called
serfs, and distinguished from villeins, who were only
bound to fixed payments and duties in respect of their
lord, though, as it seems, without any legal redress if
injured by him. --Hallam.
Usage: A slave is the absolute property of his master, and
may be sold in any way. A serf, according to the
strict sense of the term, is one bound to work on a
certain estate, and thus attached to the soil, and
sold with it into the service of whoever purchases the
land.