/ Dictionary / Index C crumbly: Meaning and Definition of Find definitions for: crum•bly Pronunciation: (krum'blē), [key] — -bli•er, -bli•est. apt to crumble; friable. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: crumbly (Thesaurus) crumblings crumbum Related Content Daily Word Quiz: boorish Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language