Legal terminology is a particularly dynamic phenomenon that evolves con- tinually in response to changes in theory, practice, and legislation. This is especially true in the context of international law, including European law. The need for regular care of the legal language has been recognised by the research group of the programme P5-0217 "Incorporation of the EU Legal Terminology into the Slovenian Legal System”, which, in cooperation with ZRC-SAZU, published the first version of an expanding online Dictionary of European Legal terminology. This dictionary transposes European legal terminology into Slovenian, focusing particularly on the legal terminology of the European Union. It also significantly enriches this focus with a collection of established English legal terms. The Dictionary of European Legal Termi- nology is inherently expanding, meaning that the research group will conti- nuously add new legal terms and, with the help of user feedback, modify and supplement previously published entries,
Key words: Dictionary of European Legal Terminology, legal terminology, expanding dictionary, law, European Union.