Dense describes something with a lot of things or people packed close together. It can be used to talk about places or groups.
The forest is dense with tall trees.
The crowd was dense at the concert.
Dense can mean something is hard to understand because it has many facts or is complicated. This is often used for writing or talking.
The book is dense with hard ideas.
Her speech was dense and hard to follow.
Dense can describe a person who is slow to understand something. This use is informal and often a bit rude.
He is a bit dense sometimes.
Don't be dense; listen carefully.
This meaning is used in science to talk about cells or particles that are very close or packed hard together.
Dense tissue protects organs well.
Dense gases fill the container completely.
Dense describes plants or trees that grow very close together and are hard to go through.
The jungle is dense with green plants.
We walked through dense bushes.
