opposition in WordNet English dictionary

1. the act of hostile groups opposing each other
   "the government was not ready for a confrontation with the unions"; "the invaders encountered stiff opposition"
   confrontation  opposition 
   
2. an armed adversary (especially a member of an opposing military force)
   "a soldier must be prepared to kill his enemies"
   enemy  foe  foeman  opposition 
   
3. a contestant that you are matched against
   opposition  opponent  opposite 
   
4. the relation between opposed entities
   opposition  oppositeness 
   
5. the action of opposing something that you disapprove or disagree with
   "he encountered a general feeling of resistance from many citizens"; "despite opposition from the newspapers he went ahead"
   resistance  opposition 
   
6. a body of people united in opposing something
   opposition 
   
7. a direction opposite to another
   opposition