A more thorough explanation:

Definition: A type of civil or legal proceeding that deals with issues related to marriage, such as divorce, annulment, or separation.

Example: A couple decides to file for divorce and initiates a matrimonial action in court. The court will then address issues such as property division, child custody, and spousal support.

This example illustrates how a matrimonial action is a legal process that deals with the dissolution of a marriage and the related issues that arise from it.