/ Dictionary / Index R rubiginous: Meaning and Definition of Find definitions for: ru•big•i•nous Pronunciation: (r-bij'u-nus), [key] — adj. rusty; rust-colored; brownish-red. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. rubify Rubik's cube Related Content Daily Word Quiz: portent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language