ENTraditionally curriculum theorists and education philosophers have tried to clarify the concept of curriculum by proceeding from a review of definitions, found in the curriculum research field, to presenting their own definitions. Our paper provides a brief discussion of the issue of defining curriculum concept in contemporary educational discourse showing how curriculum is viewed by curricular theorists (traditionalists and reconceptualists) representing the modern and postmodern perspectives. The discussed problems of Lithuanian curriculum and its terminology based on the analysis of Lithuanian educational discourse show that the main most widely used term „ugdymo turinys“ is exclusively defined in terms of content or subject matter. It calls for the necessity of clarification and reconceptualisation of curriculum notion considering its complexity and relatedness to different aspects of educational process. [From the publication]