Concept: a dialogic instrument in architectural design Introduction A notional outline Interdisciplanarity in architecture An instrumental definition of the concept Generators and depictions of concept Apparatus : Selection of interdisciplinarily conceptualized designs List of figures Concept this is a key term in architectural discourse. However all too often it is used imprecisely or merely for marketing purposes. What is a concept actually This publication moves between design theory and design practice and follows the history of the definition of concept in architecture leading to the formulation of a specifically instrumental and operative definition. It bases concept in architecture on its strategic potential in design decision making processes. In the changing profession of the designing architect decisions are increasingly made in multidisciplinary groups. Concept can serve as a dialogic instrument in the process making it possible to process heterogeneous information from a range of spheres of knowledge. The effective presentation of selected information becomes a relevant interface in the design process which has a significant influence on the quality of the design. Cover