A more thorough explanation:

Definition: An additional right that is granted to the same owner of a main right.

Example: The right to a security is an accessory right to the right that is secured. For instance, if a person owns a piece of land, they have the main right to it. However, if they also have the right to use a neighboring property for a specific purpose, that right is an accessory right.

This means that the accessory right is supplementary to the main right and is granted to the same owner. It is important to note that the accessory right cannot exist without the main right.