what is called coupling?

[W_Heisenberg]

there are many coupling and I do not understand what is called a coupling


it is something connecting two things by word itself, yet when applying to EE, what is it?

 

[FvM]

I'm not aware of a meaning related to the topic of this board (DSP).

For various meanings in other fields of electronics see https://en.wikipedia.org/wiki/Coupling_(electronics)