The concept of Value is one that has opened onto many reflections throughout history, leading to the emergence of a plurality of visions, some converging, but most diverging. Nowadays, the word 'Value' is frequently used, but with a definition which varies with every discipline. This makes it a polysemous and transverse notion. In this article, we present several visions and definitions, which have appeared in philosophy, sociology, economics, finance, marketing, management and design. Our multidisciplinary approach is not intended to select or discard any definition, but firstly we wish to enhance the polysemy of the word Value and the similarities and differences between disciplines. Secondly, we wonder if the fuzzy meaning of Value in all these disciplines is due to a confusion with the notion of 'interest'. Following this idea, we propose a model of agents and interactions of the economic environment.