1. past tense of crumble; broke or fell apart into small pieces
2. past tense of crumble; gradually declined or failed

1. broken into small pieces or fragments

Examples

• The old wall crumbled after years of weathering.
• She crumbled the cookies over her ice cream.
• His confidence crumbled under pressure.
• The ancient empire crumbled from within.
• The crumbled cheese added texture to the salad.
• We found crumbled stones scattered around the ruins.
• The business crumbled during the recession.