Opposition (noun)

1. Resistance or disagreement to a particular idea, plan, or government.
2. A group or party that is against a particular idea, plan, or government.
3. A contestant or team competing against another in a sporting event or contest.
4. The position or alignment of one celestial body relative to another, especially with reference to the relative positions of the Earth, Moon, and Sun.

Origin:

Late middle english from latin oppositio(n-), from opponere meaning to set against.

Examples:

1. The opposition to the new law was strong and well organized.
2. The opposition party won the election by a narrow margin.
3. In the championship game, the opposition was a strong and experienced team.
4. The opposition between the two planets was visible from Earth.
5. The opposition leader promised to fight corruption if elected to power.