:to fall or shrink together abruptly and completely :fall into a jumbled or flattened mass through the force of external pressure
- a blood vessel that collapsed
:to break down completely :disintegrate
- … his case had collapsed in a mass of legal wreckage …
- —Erle Stanley Gardner
:to cave or fall in or give way
:to suddenly lose force, significance, effectiveness, or worth
- fears that the currency may collapse
:to break down in vital energy, stamina, or self-control through exhaustion or disease
:to fall helpless or unconscious
- She came home from work and collapsed on the sofa.
- He collapsed on stage during the performance.
:to fold down into a more compact shape
:to cause to collapse
- buildings collapsed by an earthquake
- collapse several stories into one