a.

1. 密集的，稠密的
   We fought our way through dense forest.

   我們奮力通過密林。

2. （煙，霧等）濃厚的
   Traffic slowed down because of the dense fog.

   因濃霧車輛減速行駛。

3. 愚鈍的
   He is so dense he'll never amount to anything.

   他十分愚鈍，絕不會有出息。

adj.

1. closely compacted in substance.
   ▸crowded closely together.
2. informal (of a person) stupid.