1. falls down or caves in suddenly
Usage: third person singular present
2. fails completely or suddenly
Usage: third person singular present
3. becomes unconscious or extremely weak
Usage: third person singular present

1. instances of falling down or caving in
Usage: plural
2. sudden failures or breakdowns
Usage: plural

Examples

• The old building collapses during the earthquake.
• The economy collapses when banks fail.
• She collapses from exhaustion after the marathon.
• The bridge collapses under too much weight.
• His business collapses due to poor management.
• The roof collapses after the heavy snowfall.
• The government collapses amid corruption scandals.