/ Dictionary / Index T tumbling box: Meaning and Definition of Find definitions for: tum'bling box" Pronunciation: [key] a box, pivoted at two corners, used in the manner of a tumbling barrel. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. tumbling barrel tumbrel Related Content Daily Word Quiz: impetuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language