Definition from Wiktionary, the free dictionary
- (intransitive) To disintegrate.
- My old briefcase is falling apart. I'll have to buy a new one.
- 2011, Tom Fordyce, Rugby World Cup 2011: England 12-19 France 
- England's World Cup dreams fell apart under a French onslaught on a night when their shortcomings were brutally exposed at the quarter-final stage.
- (idiomatic) To be emotionally in crisis.
- As a result of being addicted to heroin, she was falling apart.
- (break into pieces through being in a dilapidated state): break, break apart, break up, come apart, come apart at the seams, disintegrate, fall to bits, fall to pieces
- (be emotionally in crisis): crack up
intransitive: break into pieces through being in a dilapidated state