/ Dictionary / Index R robustious: Meaning and Definition of Find definitions for: ro•bus•tious Pronunciation: (rō-bus'chus), [key] — adj. rough, rude, or boisterous. robust, strong, or stout. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: robustious (Thesaurus) robusta coffee roc Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language