implosion

Short definition from Wiktionary

Noun

1. 1
   The inrush of air in forming a suction stop.
2. 2
   The action of imploding.
3. 3
   The act or action of bringing to or as if to a center.
4. 4
   Violent compression.
5. 5
   A catastrophic failure; a sudden failure or collapse of an organization or system.