Book excerpt: between linguistic and psychoanalytic concepts necessarily arises. Until now this question has been examined mainly by psychoanalysts, from their own perspective, but here it is investigated by a linguist, who systematically explores two domains. The first is related to the sign and symbol, where the meeting of Freud, Saussure and Hjelmselv occurred; whereas in the second, that of the signifier, Saussure reappears escorted by Lacan. But Freud is not far away, since the.