Being a subset of a topological space that approximates the space well. See the Wikipedia article on dense sets for a mathematical definition.
Opaque; allowing little light to pass through.
Thick; difficult to penetrate.
Obscure, or difficult to understand.
Slow to comprehend; of low intelligence.
Having relatively high density.
Compact; crowded together.
A thicket.
Having features typical of philosophical materialism.
Someone who is materialistic, concerned only with material possessions.
A follower or proponent of philosophical materialism.