Something people do. It has no life its own. There is no magic about it except what people in the communication relationship put into it. When one studies communication, they are actually studying people, relating to each other and their groups , organizations and societies - influencing each other and being influenced, informing and being informed, taching and being taught, entertaining and being entertained - by means of certain signs that exist separately from either of them. To understand the human communication process, one must understand how people relate to each other.
Definition of Communication (Wilbur Schramm)