disintegration in WordNet English dictionary

1. total destruction
   "bomb tests resulted in the annihilation of the atoll"
   annihilation  disintegration 
   
2. the spontaneous disintegration of a radioactive substance along with the emission of ionizing radiation
   decay  radioactive decay  disintegration 
   
3. in a decomposed state
   decomposition  disintegration 
   
4. separation into component parts
   dissolution  disintegration 
   
5. a loss (or serious disruption) of organization in some system
   "a disintegration of personality"
   disintegration