A more thorough explanation:

A magisterial district is a geographical unit of government that defines the territorial jurisdiction of a magistrate, constable, or justice of the peace. It is also known as a magisterial precinct or precinct.

For example, in a county, there may be several magisterial districts that determine which magistrate or justice of the peace has jurisdiction over a particular area. This helps to ensure that justice is administered fairly and efficiently.

Magisterial districts are important for the functioning of local government and law enforcement. They help to divide up areas of responsibility and ensure that each magistrate or justice of the peace has a manageable workload.