1. It measures the number of linearly-independent paths through a program module.

2. 27 In software engineering, the degree to which the tasks performed by a single program module are functionally related.

3. In computer science, Coupling is considered to be the degree to which each program module relies on other modules, and is also the term used to describe connecting two or more systems.Coupling is broken down into loose Coupling, tight Coupling, and decoupled