dense

dense (http://definr.com/dense)

     adj 1: permitting little if any light to pass through because of
            denseness of matter; "dense smoke"; "heavy fog";
            "impenetrable gloom" [syn: heavy, impenetrable]
     2: closely crowded together; "a compact shopping center"; "a
        dense population"; "thick crowds" [syn: compact, thick]
     3: hard to pass through because of dense growth; "dense
        vegetation"; "thick woods" [syn: thick]
     4: having high relative density or specific gravity; "dense as
        lead"
     5: 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"
        [syn: dim, dull, dumb, obtuse, slow]