opposition

noun

1. the major political party opposed to the party in office and prepared to replace it if elected"Her Majesty's loyal opposition"
2. the action of opposing something that you disapprove or disagree with"he encountered a general feeling of resistance from many citizens"
3. the relation between opposed entities
4. the act of hostile groups opposing each other"the government was not ready for a confrontation with the unions"
5. a contestant that you are matched against
6. a body of people united in opposing something
7. a direction opposite to another
8. an armed adversary (especially a member of an opposing military force)"a soldier must be prepared to kill his enemies"