A more thorough explanation:

Definition: A surrenderor is someone who gives up or yields a copyhold estate for conveyance. They are also known as surrenderers. Copyhold is a type of land tenure in which a person holds land from a lord of the manor, and the surrenderor is the person who surrenders their rights to that land.

Example: John inherited a copyhold estate from his father, but he decided to surrender it to the lord of the manor so that it could be conveyed to someone else. In this case, John is the surrenderor.

Example: Before the passing of St.55 Geo. 3, ch. 192, a surrender to uses of will was required for a copyhold interest passed by will to the will's uses. This means that if someone wanted to pass on their copyhold estate through their will, they had to surrender it to the will's uses first. However, this requirement was abolished by the law.

Explanation: The examples illustrate how a surrenderor is someone who gives up their rights to a copyhold estate. In the first example, John surrenders his copyhold estate to the lord of the manor. In the second example, the surrender to uses of will was a requirement for passing on a copyhold estate through a will, but this requirement was abolished by the law.