111 specialists have collaborated on this dictionary, under the leadership of Jean-Pierre Cuq. This dictionary has been designed for students, for teachers and researchers who major in trainig, teaching and research in linguistics, psychology and sociology. It encompasses more than 660 concepts and notions . At the end of this book, a bibliography gathers the books recalled throughout the articles and the books which may be useful to complete this one. A multilingual glossary translates the title of all the articles in German, English, Spanish, Italian and Portuguese . The ASDIFLE has decided to create this dictionary.