This article considers dictionaries as lexical information / knowledge sources to be derived from a deeper, underlying, lexical database. These dictionary-tokens or -instantiations are inter alia specified by the users' needs. As a case in point of such a derivation meeting the needs of a multilingual society, a bidirectional bilingual learner dictionary is presented. Specific tools, such as editors with reversal function, and models, such as the hub-and-spoke model, are discussed as means to function within the lexicographical infrastructure of a multilingual society.