http://es.wikipedia.org/wiki/Señorío
http://en.wikipedia.org/wiki/Manorialism
Manorialism or Seigneurialism, an essential ingredient of feudal society,[1] was the organizing principle of rural economy that originated in the villa system of the Late Roman Empire, was widely practiced in medieval western and parts of central Europe, and was slowly replaced by the advent of a money-based market economy and new forms of agrarian contract. Manorialism was characterised by the vesting of legal and economic power in a lord, supported economically from his own direct landholding and from the obligatory contributions of a legally subject part of the peasant population under his jurisdiction. These obligations could be payable in several ways, in labor (the French term corvée is conventionally applied), in kind, or, on rare occasions, in coin.

http://petrimoulx.pbworks.com/f/SpanishGlossary.pdf
manorialism [régimen señorial] s. sistema
social en el que campesinos trabajan las
tierras de un señor, a cambio de protección
y seguridad. (pág. 87)

http://rua.ua.es/dspace/handle/10045/605
En estos casos, la abolición de derechos señoriales significó únicamente la pérdida de sus derechos exclusivos, privativos y prohibitivos, pero consolidaron como propiedad privada sus respectivos patrimonios.

In these cases, the abolition of the rights of the lords signified only the loss of their exclusive rights, private and prohibitive, for they consolidated as private property their respective patrimony.