A more thorough explanation:

Definition: Feodum novum (or feodum) is a Latin term that refers to a new fief or feud that began with the person of the feudatory and was not acquired by succession.

Example: If a lord granted a new piece of land to a vassal, it would be considered a feodum novum. This type of fief was not inherited from ancestors but was acquired by the vassal's own merit or service to the lord.

Explanation: Feodum novum was a new type of feudal land tenure that emerged during the Middle Ages. It was different from feodum antiquum, which was a feud that passed to a vassal from an intestate ancestor, or a feud that ancestors had possessed for more than four generations. Feodum novum was a way for lords to reward their vassals for their service and loyalty, and it allowed vassals to acquire new lands and increase their power and wealth.