opposition

noun7

1. •
   The action of opposing or of being in conflict.

   • The two politicians are in opposition to the bill.
   • The proposal met with strong opposition from local residents.
2. •
   In United States intellectual property law, a proceeding in which an interested party seeks to prevent the registration of a trademark or patent.
3. •
   A political party or movement opposed to the party or government in power.
4. •
   An opposite or contrasting position.

   • These ideas are in opposition to each other.
5. •
   The difference of quantity or quality between two propositions having the same subject and predicate.
6. •
   The apparent relative position of two celestial bodies when one is at an angle of 180 degrees from the other as seen from the Earth.
7. •
   A position in which the player on the move must yield with his king allowing his opponent to advance with his own king.