n.
1.the action of opposing something that you disapprove or disagree with
2.the relation between opposed entities
3.the act of opposing groups confronting each other
4.a contestant that you are matched against
5.a body of people united in opposing something
6.a direction opposite to another
7.an armed adversary (especially a member of an opposing military force)
8.a political party opposed to the party in power and prepared to replace it if elected