ABSTRACT
Adictionary could be defined as “a reference book that enumerates in alphabetical order, terms or words that are important for an activity or a particular matter, together with a discussion of their meanings or applications” 1 . This is precisely the intention of the present dictionary, for it to be used as a “reference book”, as an indispensable partner and a guide in the adventure of the fascinating discovery, although highly dense, complex and frequently frustrating, of Wilfred Ruprecht Bion’s great legacy to psychoanalysis. Therefore, it should never replace the reading of his original texts. It is proper now to quote his words:
Even in language itself a dictionary is not all that is needed; one has to understand the nature of language as well as the actual language in which one is attempting to speak. [1974, p. 202]
