A more thorough explanation:

Definition: A legal document that serves as a written rejection of a marriage proposal or offer of marriage. It is similar to a divorce document, but it is used when the marriage has not yet taken place.

Example: If a man proposes to a woman and she does not want to marry him, she can use a libellus repudii to formally reject his proposal.

Explanation: The libellus repudii is a legal way for someone to decline a marriage proposal. It is important because it provides a written record of the rejection, which can be used in court if necessary. The example illustrates how the document can be used in a real-life situation.