The phrase "city limits" refers to the boundary or jurisdictional extent of a city's legal authority. There are a variety of synonyms that can be used to describe this boundary, including city boundaries, city line, city perimeter, city border, city frontier, city confines, city precincts, city district, city environs, and city terrain. Each of these expressions carries a slightly different connotation, but all refer to the physical and legal limits of a city's authority. When referring to the limits of a particular city, it is important to choose the most accurate synonym to ensure clear communication with readers or listeners.