Adjective dense has 5 senses
  1. dense, heavy, impenetrable - permitting little if any light to pass through because of denseness of matter; "dense smoke"; "heavy fog"; "impenetrable gloom"
    Antonym: thin (indirect, via thick)
  2. compact, dense, thick - closely crowded together; "a compact shopping center"; "a dense population"; "thick crowds"
    Antonym: distributed (indirect, via concentrated)
  3. dense, thick - hard to pass through because of dense growth; "dense vegetation"; "thick woods"
    Antonym: penetrable (indirect, via impenetrable)
  4. dense - having high relative density or specific gravity; "dense as lead"
    Antonym:
    light (indirect, via heavy)
  5. dense, dim, dull, dumb, obtuse, slow - 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"
    Antonym: smart (indirect, via stupid)
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