to break because of being old or badly made. I've read this book so often it's falling apart. Synonyms and related words. To break.

What does it mean for someone to fall apart?

If you say that someone is falling apart, you mean that they are becoming emotionally disturbed and are unable to think calmly or to deal with the difficult or unpleasant situation that they are in. [informal] I was falling apart. I wasn't getting any sleep.

How do you use fall apart?

The deal fell apart because of a lack of financing. Their marriage fell apart when she found out about her husband's affair. The whole family seems to be falling apart since Daniel died. The whole apparatus of communism was already falling apart.