The area over which a bailiff has jurisdiction WordNet 3.0 & Open English WordNet

A bailiwick is usually the area of jurisdiction of a bailiff, and once also applied to territories in which a privately appointed bailiff exercised the sheriff's functions under a royal or imperial writ. In English the original French bailie combined with '-wic', the Anglo-Saxon suffix to produce a term meaning literally 'bailiff's village'—the original geographic scope of a bailiwick. Wikipedia

Usually the area of jurisdiction of a bailiff Wikidata

A person's concern or sphere of operations, their area of skill or authority. Wiktionary