Meaning of DENSE in English

DENSE

/ dens; NAmE / adjective ( dens·er , dens·est )

1.

containing a lot of people, things, plants, etc. with little space between them :

a dense crowd / forest

areas of dense population

2.

difficult to see through

SYN thick :

dense fog / smoke / fumes

3.

( informal ) stupid :

How can you be so dense?

4.

difficult to understand because it contains a lot of information :

a dense piece of writing

5.

( technical ) heavy in relation to its size :

Less dense substances move upwards to form a crust.

►  dense·ly adverb :

a densely populated area

densely covered / packed

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WORD ORIGIN

late Middle English : from Latin densus .

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.