1. a person who opposes or resists something or someone

Examples

• The senator was a vocal opposer of the new tax legislation.
• Environmental groups emerged as strong opposers of the pipeline project.
• She faced several opposers during her campaign for mayor.
• The opposers of the school merger organized a petition drive.
• As an opposer of the policy, he spoke at every town hall meeting.
• The bill’s opposers argued it would harm small businesses.