Definitions of Communication

The term communication can be defined in many ways here are a few:

• The imparting or exchanging of information by speaking, writing, or using some other medium. 

• A process by which information is exchanged between individuals through a common system of symbols, signs, or behavior.

Question

What do these definitions of communication have in common?

References

9http://www.merriam-webster.com/dictionary/communication

http://www.oxforddictionaries.com/definition/english/communication

https://www.youtube.com/watch?v=frNHRyldFiY