Sandro Nielsen and Lise Mourier e traditional definition of a dictionary needs to be replaced by one that defines the dictionary in terms of lexicographic functions, data and structures. ese must be linked to the intended user groups, the users’ linguistic and factual competences and their needs in the relevant situations of use. e functions of the dictionary include translation, production, reception and revision of texts, and knowledge acquisition, and the user groups may be divided into experts, semi-experts and interested laypeople. e dictionary discussed in this paper takes advantage of the space available in an open-ended electronic dictionary and is unique because it combines several data types relevant to the need of the users in function-related situations, including: definitions, grammatical information, collocations, phrases, cross-references, synonyms and antonyms. Both the factual and linguistic data are particularly helpful to the user in communication-oriented situations within a register-specific context such as accounting.