A more thorough explanation:

Definition: Universitas rerum is a Latin term used in Roman and civil law to refer to a collection of individual things that are considered as a whole by the law. It is also known as universitas iuris.

For example, in the time of Justinian, universitas rerum referred to the sum or whole of a person's legal position concerning the ius rerum. This concept was important in law, especially during events like death, where the universitas would pass from one person to another.

The term universitas rerum can also be used to describe any collection of objects that are considered as a whole. For instance, a library can be seen as a universitas rerum since it is a collection of books that are regarded as a whole.

The examples illustrate how universitas rerum is used to refer to a collection of individual things that are regarded as a whole by the law or society.