/ Dictionary / Index D dustproof: Meaning and Definition of Find definitions for: dust•proof Pronunciation: (dust'prf"), [key] — adj. impervious to or free of dust. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. dustpan dust ruffle Related Content Daily Word Quiz: candor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language