See also loose coupling, tight coupling, and decoupled.

Design loosely coupled modules - object oriented systems
This article explains the coupling between the classes. It also explains the consequences of high coupling. The article then classifies coupling and explains each type of coupling along with the ways to eliminate the coupling.

Long-lived systems: decoupling
Systems that are clearly separated from each other live longer than systems that are coupled.

Towards a More Effective Coupling of Reflection and Runtime Metamodels for Middleware (PDF)
Reflection plays an important role in the flexibilisation of middleware platforms. Through dynamic inspection, middleware interfaces can be discovered and invoked at runtime, and through adaptation the structure and behavior of the platform can be modified on-the fly to meet new user or environment demands.