A more thorough explanation:

Definition: Non plevin is a Latin term used in history to describe the failure to timely replevy land after it is taken by the Crown on a default.

Example: If a person fails to pay their taxes, the Crown may take possession of their land. If the person does not take action to reclaim their land within a certain period of time, they are said to have committed non plevin.

This term is not commonly used in modern times, but it is still relevant in legal history and can be found in historical documents and records.