collapsed

Concise Oxford English Dictionary © 2008 Oxford University Press:
collapse/kəˈlaps/

▶verb

• 1 (of a structure) suddenly fall down or give way.

  ■ (usu. as adj. collapsed) (of a lung or blood vessel) fall inwards and become flat and empty.

• 2 fall down as a result of illness or injury.

• 3 fail suddenly and completely.

▶noun

• 1 an instance of a structure collapsing.

• 2 a sudden failure or breakdown.

– origin C17: from medical L. collaps-, collabi, from col- ‘together’ + labi ‘to slip’.