collapse >> /kəˈlæps/
Definition: [intransitive verb] (of a structure) fall down or in; give way.
Example: the roof collapsed on top of me
Definition: [intransitive verb] (of a person) fall down and become unconscious, typically through illness or injury.
Example: he collapsed from loss of blood
Definition: [intransitive verb] (of an institution or undertaking) fail suddenly and completely.
Example: in the face of such resolve his opposition finally collapsed
Definition: [intransitive verb] Fold or be folded to fit into a small space.
Example: some cots collapse down to fit into a bag
Definition: [noun] An instance of a structure falling down or in.
Example: the collapse of a railroad bridge