Final answer:
A serf was a person who lived and worked on the private land of a noble or medieval lord.
Step-by-step explanation:
In medieval times, a person who lived and worked on the private land of a noble or medieval lord was called a serf. Serfs were bound to the land and were not allowed to leave without permission from their lord. They were responsible for working the fields, tending to livestock, and performing other tasks to support the lord and the manor.
Learn more about Serfs in medieval times