Serfdom is a form of bondage in which a person is bound to the land of a lord and is required to provide labor in exchange for protection and the use of land. Serfdom was widespread in Europe during the Middle Ages, but it has since been abolished in most countries.
Indentured servitude is a form of labor in which a person agrees to work for a specific period of time in exchange for passage to a new country or other benefits. Indentured servitude was common in the early days of the United States, but it is no longer practiced.