purgation in WordNet English dictionary

1. purging the body by the use of a cathartic to stimulate evacuation of the bowels
   catharsis  katharsis  purgation 
   
2. the act of clearing yourself (or another) from some stigma or charge
   purge  purging  purgation 
   
3. a ceremonial cleansing from defilement or uncleanness by the performance of appropriate rites
   purification  purgation