Pronunciation: (krum'bul), [key]
—v., -bled, -bling,
to break into small fragments or crumbs.
1. to fall into small pieces; break or part into small fragments.
2. to decay or disintegrate gradually: The ancient walls had crumbled.
1. a crumbly or crumbled substance.
2. crumbles,bits of crisp bacon, bread, etc., added to other foods, esp. as a topping.
3. Brit. Dial.crumb; particle; fragment.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.