<p><strong>Adjective</strong></p><ul><li>having the component parts closely compacted together; crowded or compact: a dense forest; dense population.</li><li>Synonyms: impenetrable, teeming.</li><li>stupid; slow-witted; dull.</li><li>intense; extreme: dense ignorance.</li><li>relatively opaque; transmitting little light, as a photographic negative, optical glass, or color.</li><li>difficult to understand or follow because of being closely packed with ideas or complexities of style: a dense philosophical essay.</li><li>Mathematics: of or relating 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.</li></ul>