/ Dictionary / Index R rumbustious: Meaning and Definition of Find definitions for: rum•bus•tious Pronunciation: (rum-bus'chus), [key] rambunctious. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: rumbustious (Thesaurus) rumbly rum-dum Related Content Daily Word Quiz: censure Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language