/ Dictionary / Index C colluvium: Meaning and Definition of Find definitions for: col•lu•vi•um Pronunciation: (ku-l'vē-um), [key] — pl. -vi•a -vi•ums. loose earth material that has accumulated at the base of a hill, through the action of gravity, as piles of talus, avalanche debris, and sheets of detritus moved by soil creep or frost action. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. collutory colly Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language