rehabilitant adjective 1noun 1forms 3 adjective1 •Undergoing or pertaining to rehabilitation.There are no differences, on any of the twenty factors studied, between the rehabilitant and non-rehabilitant groups. — 1961 noun1 •One who is being or has been rehabilitated.The rehabilitator and the rehabilitant assess each other. — 1973 formsrehabilitants · more rehabilitant · most rehabilitant