collapse:1

verb
col*lapse \ kə-ˈlaps \
1620{ds|t|1||}
  • to fall or shrink together abruptly and completely : fall into a jumbled or flattened mass through the force of external pressure
  • to break down completely : disintegrate
  • to cave or fall in or give way

collapse:2

noun
collapse \
1801{ds||1|a|}
  • a breakdown in vital energy, strength, or stamina
  • a state of extreme prostration and physical depression (as from circulatory failure or great loss of body fluids)
  • an airless state of all or part of a lung originating spontaneously or induced surgically

colony collapse disorder

noun
colony collapse disorder \
2007
  • a disorder of honeybees (Apis mellifera) that is of unknown cause and that is characterized by sudden colony death due to the disappearance of all adult worker bees in a hive while immature bees, the queen bee, and the honey remain —abbreviation CCD

collapse/fall in a heap

idiom
collapse/fall in a heap \
  • to fall very suddenly to the ground and lie there
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