perceptive UK /pəˈsɛptɪv/US /pɚˈsɛptɪv/adjective 1noun 1forms 3 adjective1 •Having or showing keenness or sharpness of perception, insight, understanding, or intuition.He is so perceptive when it comes to other people's feelings. noun1 •A supposed organ of the brain, dealing with concrete observations of reality.Then why not subdivide the reflectives and perceptives into distinct organs having special relations to external objects, as well as divide the intellect into a reflective and a perceptive portion? — 1872 formsperceptives · more perceptive · most perceptive