A more thorough explanation:

Definition: Yardland is a term used in history to describe a piece of land that could vary in size, but was often around 20 acres. It was also known as virga terrae.

Example: In medieval England, a yardland was a unit of measurement used to determine the amount of land a peasant could farm. It was usually enough land to support a family.

Explanation: The example illustrates how yardland was used as a measurement of land in medieval England. It was an important unit of measurement because it determined how much land a peasant could farm and support their family. The size of a yardland could vary, but it was typically around 20 acres.