exclusion in WordNet English dictionary

1. the state of being excommunicated
   excommunication  exclusion  censure 
   
2. the act of forcing out someone or something
   "the ejection of troublemakers by the police"; "the child's expulsion from school"
   ejection  exclusion  expulsion  riddance 
   
3. a deliberate act of omission
   "with the exception of the children, everyone was told the news"
   exception  exclusion  elision 
   
4. the state of being excluded
   exclusion