Definition of opposition
1
:a configuration (see configuration 1b) in which one celestial (see 1celestial 2) body is opposite another (such as the sun) in the sky or in which the elongation (see elongation 1) is near or equal to 180 degrees
2
:the relation between two propositions having the same subject and predicate but differing in quantity or quality or both
3
:an act of setting opposite or over against :the condition of being so set
- He spoke in opposition to the new law.
4
:hostile or contrary action or condition
- offered strong opposition to the advance of the enemy
5 a
:something that opposes;
specifically
:a body of persons opposing something
- Each candidate is focused on raising more money than the opposition.
b
often capitalized
:a political party opposing and prepared to replace the party in power
- The opposition is likely to win the upcoming election.
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