| gathered together or made less diffuse | having high relative density or specific gravity |
| (of light) transmitted directly from a pointed light source | hard to pass through because of dense growth |
| being the most concentrated solution possible at a given temperature; unable to dissolve still more of a substance | slow to learn or understand; lacking intellectual acuity |
| intensely focused | permitting little if any light to pass through because of denseness of matter |
| of or relating to a solution whose dilution has been reduced | having component parts closely crowded together |