fall apart phrasal verb (see also fall)

1. if an organization, system, relationship etc falls apart, it stops being effective or successful:
Don’t be reckless or your plans may fall apart.
The health service is falling apart at the seams.

2. be falling apart to be in very bad condition:
Tommy’s old bicycle was rusty and falling apart.

3. to break into pieces:
The book fell apart in my hands.

4. to be unable to deal with your personal or emotional problems:
She had to get some rest or she was going to fall apart.

5. sb’s world/life falls apart if someone’s world or life falls apart, something very bad and serious happens which changes their life:
When his wife left him, his world fell apart.

[TahlilGaran] Dictionary of Contemporary English ▲

fall apart
1.
to stop working or fail completely.
Her marriage fell apart after about ten years.

The deal to sell the company fell apart last summer.

2.
to break into pieces.
Cook the tomatoes until they begin to fall apart.

When the roof wasn't repaired, the building really began to fall apart.

[TahlilGaran] English Idioms Dictionary ▲

fall apart
to become to not work properly
The equipment fell apart soon after I bought it.

[TahlilGaran] English Idioms Dictionary ▲