There is no commonly used word or term in the English language that starts with "P-L". Therefore, it is not possible to provide a dictionary definition for "P-L". It is important to note that when defining a term or word, it should be an existing word or phrase that is recognized and used in the English language. However, if "P-L" is an acronym or an abbreviation for a specific term, it would require more context or information in order to provide an accurate definition. It is recommended to provide additional details or clarify the meaning of "P-L" to receive a proper definition.