- having the component parts closely compacted together; crowded or compact: a dense forest; dense population.
- stupid; slow-witted; dull.
- intense; extreme: dense ignorance.
- relatively opaque; transmitting little light, as a photographic negative, optical glass, or color.
- difficult to understand or follow because of being closely packed with ideas or complexities of style: a dense philosophical essay.
- Mathematics. of or relating 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 of dense
1590–1600; < Latin dēnsus thick; cognate with Greek dasýs
SynonymsSee more synonyms on Thesaurus.com
1. congested, crammed, teeming; impenetrable.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for ultradense
The ultradense cities of East Asia—Hong Kong, Singapore, and Seoul—have among the lowest fertility rates on the planet.City Leaders Are in Love With Density but Most City Dwellers Disagree
September 16, 2013
- thickly crowded or closely seta dense crowd
- thick; impenetrablea dense fog
- physics having a high density
- stupid; dull; obtuse
- (of a photographic negative) having many dark or exposed areas
- (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
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for ultradense
early 15c., from Middle French dense and directly from Latin densus "thick, crowded; cloudy," perhaps from PIE root *dens- "dense, thick" (cf. Greek dasus "hairy, shaggy"). Sense of "stupid" is first recorded 1822.
Online Etymology Dictionary, © 2010 Douglas Harper