| 1. | having the component parts closely compacted together; crowded or compact: a dense forest; dense population. |
| 2. | stupid; slow-witted; dull. |
| 3. | intense; extreme: dense ignorance. |
| 4. | relatively opaque; transmitting little light, as a photographic negative, optical glass, or color. |
| 5. | difficult to understand or follow because of being closely packed with ideas or complexities of style: a dense philosophical essay. |
| 6. | Mathematics. of or pertaining to a subset of a topological space in which every neighborhood of every point in the space contains at least one point of the subset. |
