/ Dictionary / Index L low-density: Meaning and Definition of Find definitions for: low-den•si•ty Pronunciation: (lō'den'si-tē), [key] — adj. having a low concentration. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: low-density (Thesaurus) low country low-density lipoprotein Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language