Socage (Free and Common)

Socage is a type of tenure whereby lands are held in consideration of certain services of husbandry (farming) performed for a superior, such as the lord of the manor. Free and common is the highest form of socage, being a tenure that is both certain and honorable. Conversely, tenure by either capite or Knights Service is certainly honorable, but can be quite uncertain.

Source: Black's Law Dictionary, 4th Edition.