A more thorough explanation:

Definition: Forum Regium is a Latin term that refers to the king's court in history.

Example: During the medieval period, the Forum Regium was the highest court of law in the kingdom. It was responsible for hearing cases that involved the king and his subjects.

Explanation: The example illustrates how the Forum Regium was the highest court of law in the kingdom during the medieval period. It was responsible for hearing cases that involved the king and his subjects, which means that it had the power to make important decisions that affected the lives of many people.