breakdown in WordNet English dictionary

1. the act of disrupting an established order so it fails to continue
   "the social dislocations resulting from government policies"; "his warning came after the breakdown of talks in London"
   dislocation  breakdown 
   
2. an analysis into mutually exclusive categories
   breakdown  partitioning 
   
3. a cessation of normal operation
   "there was a power breakdown"
   breakdown  equipment failure 
   
4. a mental or physical breakdown
   breakdown  crack-up