/ Dictionary / Index H high-density: Meaning and Definition of Find definitions for: high-den•si•ty Pronunciation: (hī'den'si-tē), [key] — adj. having a high concentration: entering a high-density market with a new product. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. high-definition television high-density lipoprotein Related Content Daily Word Quiz: pugilist Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language