Abstract : We conclude our study of the term “communication” with questions raised by the definition. By what means does human communication differ from the communication between animals or between humans and machines? Does communication not imply a subject, someone endowed with interiority? Is it possible to describe what happens between two people? Can we call a machine intelligent? We also can draw the borderlines of the notion. For example, communication often requires language and our analysis of communication is only a very small part of a vast unit.