Serfdom was the status of many peasants under feudalism, specifically relating to manorialism and similar systems. It was a condition of debt bondage and indentured servitude with similarities to and differences from slavery. It developed during late antiquity and the Early Middle Ages in Europe and lasted in some countries until the mid-19th century.
Unlike slaves, serfs could not be bought, sold, or traded individually, though they could, depending on the area, be sold together with land. Actual slaves, such as the kholops in Russia, could, by contrast, be traded like regular slaves, abused with no rights over their own bodies, could not leave the land they were bound to, and marry only with their lord's permission.