[adjective] permitting little if any light to pass through because of denseness of matter; "dense smoke"; "heavy fog"; "impenetrable gloom" Synonyms: heavy, impenetrable
[adjective] closely crowded together; "a compact shopping center"; "a dense population"; "thick crowds" Synonyms: compact, thick
[adjective] hard to pass through because of dense growth; "dense vegetation"; "thick woods" Synonyms: thick
[adjective] having high relative density or specific gravity; "dense as lead"
[adjective] slow to learn or understand; lacking intellectual acuity; "so dense he never understands anything I say to him"; "never met anyone quite so dim"; "although dull at classical learning, at mathematics he was uncommonly quick"- Thackeray; "dumb officials make some really dumb decisions"; "he was either normally stupid or being deliberately obtuse"; "worked with the slow students" Synonyms: dim, dull, dumb, obtuse, slow