Bourdieu was the founder of a structuralist paradigm which is now often applied by some sociologists and strongly criticised by others. We are interested here in the intermediate attempts made by Lahire and Corcuff. Without omitting to notice some dead ends, they understood the interest of the “singular” habitus concept. After following their approach, we propose a “fictional” definition of this habitus in order to make this paradigm operational in areas where its heuristic capacity is low (like the new social movements).