/ Dictionary / Index R rust mite: Meaning and Definition of Find definitions for: rust' mite" Pronunciation: [key] any of various mites that cause brown or reddish patches on leaves and fruit. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. rustless Ruston Related Content Daily Word Quiz: placid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language