collapsing >> /kəˈlaps/
Definition: [verb] (of a structure) suddenly fall down or give way.
Example: the roof collapsed on top of me
Definition: [verb] (of a person) fall down and become unconscious as a result of illness or injury.
Example: he collapsed from loss of blood
Definition: [verb] Fail suddenly and completely.
Example: the talks collapsed last week over territorial issues
Definition: [verb] Fold or be foldable into a small space.
Example: some cots collapse down to fit into a holdall
Definition: [noun] An instance of a structure falling down or giving way.
Example: the collapse of a railway bridge