dense forests

Dense forests are wooded areas where trees grow closely together, creating thick canopies that block much of the sunlight from reaching the forest floor.

The phrase emphasizes impenetrability—a dense forest is difficult to navigate or see through, often associated with wilderness, mystery, or danger in literature and film.

The hikers lost the trail in the dense forest.

Ecologically, dense forests support rich biodiversity but can also indicate overcrowding that limits individual tree growth.