I don't think you can make well-defined boundaries.

The suburb has fairly well-defined boundaries, having been a separate borough from 1875 until the time of local government restructuring in 1989.

A corpus of knowledge does not have a single well-defined boundary; it has many fuzzy debates going on.

Heat is defined in physics as the transfer of thermal energy across a well-defined boundary around a thermodynamic system.

Agricultural fields radiate away from the well-defined outer boundaries of the town.

Atoms lack a well-defined outer boundary, so their dimensions are usually described in terms of an atomic radius.

"We insist on all our demands being met, but we represent a force with well-defined boundaries."

All of these animals have particular areas where they rest and breed, and some even feed within well-defined boundaries, seldom leaving their territory.

Presenting a remarkably intact main street, the district includes the core of the city's past and present commercial activities within a well-defined boundary.

Instead, it is the structure of political institutions, along with well-defined boundaries and roles for players, that has supported the foundation of Western pluralism.