That every language is a system of signs, that the sounds of language are posited by the speaker as signs and received by the hearer as signs, that the phenomenon of language arises as the mediator between individuals in the exchange of signs in this or some similar way we can begin to speak about language. In any case, the first thing needed logically in order to define it is a general term such as sign (σηεα, signum, seign) . What are signs?