containing a lot of people, things, plants, etc. with little space between them 密集的；稠密的 a dense crowd/forest 密集的人群；密林 areas of dense population 人口密集地区 The forest is quite dense at that point. 那时森林相当茂密。
difficult to see through 浓密的；浓重的 dense fog/smoke/fumes 浓雾；浓烟；浓烈的气体 The fog was getting very dense. 雾越来越浓了。
- (informal)
stupid 愚笨的；迟钝的；笨拙的 How can you be so dense? 你怎么会这么笨？ John's all right, but he can be a bit dense sometimes. 约翰很好，但他有时有点迟钝。
difficult to understand because it contains a lot of information （信息量大得）难理解的，难懂的 a dense piece of writing 难懂的文章
- (specialist)
heavy in relation to its size 密度大的；密实的
Word Originlate Middle English: from Latin densus.