dense

[dens]
adjective, denser, densest.
1.
having the component parts closely compacted together; crowded or compact: a dense forest; dense population.
2.
stupid; slow-witted; dull.
3.
intense; extreme: dense ignorance.
4.
relatively opaque; transmitting little light, as a photographic negative, optical glass, or color.
5.
difficult to understand or follow because of being closely packed with ideas or complexities of style: a dense philosophical essay.
6.
Mathematics. of or pertaining to a subset of a topological space in which every neighborhood of every point in the space contains at least one point of the subset.

Origin:
1590–1600; < Latin dēnsus thick; cognate with Greek dasýs

densely, adverb
denseness, noun
nondenseness, noun
superdense, adjective
ultradense, adjective


1. congested, crammed, teeming; impenetrable.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
dense (dɛns)
 
adj
1.  thickly crowded or closely set: a dense crowd
2.  thick; impenetrable: a dense fog
3.  physics having a high density
4.  stupid; dull; obtuse
5.  (of a photographic negative) having many dark or exposed areas
6.  (of an optical glass, colour, etc) transmitting little or no light
 
[C15: from Latin densus thick; related to Greek dasus thickly covered with hair or leaves]
 
'densely
 
adv
 
'denseness
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Etymonline
Word Origin & History

dense
c.1600, from L. densus "thick, crowded." Sense of "stupid" is first recorded 1822.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
The dura mater is a thick and dense inelastic membrane.
These dense coastal forests harbor a broad cross-section of wildlife species.
The dense treetop canopy plunges day into night as we enter the rain forest.
The ultra-dense remains of the galaxy's youngest supernova are full of bizarre
  quantum matter.
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