Definitions
1.nounA thicket.
2.adjectiveHaving relatively high density.
3.adjectiveCompact; crowded together.
4.adjectiveThick; difficult to penetrate.
5.adjectiveOpaque; allowing little light to pass through.
6.adjectiveObscure, or difficult to understand.
7.adjectiveBeing a subset of a topological space that approximates the space well. See Wikipedia article on dense sets for mathematical definition.
8.adjective(of a person) Slow to comprehend; of low intelligence.