A more thorough explanation:

Definition: A volumen is a legal term that refers to a rolled-up document or book. It is often used in civil law.

Examples:

• Ancient Roman legal documents were often written on papyrus scrolls that were rolled up into volumina.
• The volumen of evidence presented in the court case was overwhelming and convinced the jury of the defendant's guilt.

The examples illustrate how volumen is used to describe a rolled-up document or book, often in a legal context.