1. collapse, prostration

an abrupt failure of function or complete physical exhaustion

Example Sentences:
'the commander's prostration demoralized his men'

• prostration

2. collapse

a natural event caused by something suddenly falling down or caving in

Example Sentences:
'the roof is in danger of collapse'
'the collapse of the old star under its own gravity'

3. collapse, flop

the act of throwing yourself down

Example Sentences:
'he landed on the bed with a great flop'

• flop

4. collapse, crash

a sudden large decline of business or the prices of stocks (especially one that causes additional failures)

• crash

5. break, cave in, collapse, fall in, founder, give, give way

break down, literally or metaphorically

Example Sentences:
'The wall collapsed'
'The business collapsed'
'The dam broke'
'The roof collapsed'
'The wall gave in'
'The roof finally gave under the weight of the ice'

• break
• cave in
• fall in
• founder
• give
• give way

6. break down, collapse

collapse due to fatigue, an illness, or a sudden attack

• break down

7. collapse

fold or close up

Example Sentences:
'fold up your umbrella'
'collapse the music stand'

8. break down, collapse, crumble, crumple, tumble

fall apart

Example Sentences:
'the building crumbled after the explosion'
'Negotiations broke down'

• break down
• crumble
• crumple
• tumble

9. burst, collapse

cause to burst

Example Sentences:
'The ice broke the pipe'

• burst

10. break up, collapse, crack, crack up, crock up

suffer a nervous breakdown

• break up
• crack
• crack up
• crock up

11. collapse

lose significance, effectiveness, or value

Example Sentences:
'The school system is collapsing'
'The stock market collapsed'