1. people or things that make something legally void or ineffective
2. advocates of nullification, especially the doctrine that states can reject federal laws
Usage: historical; political

Examples

• The constitutional scholars acted as nullifiers of the controversial legislation.
• Several nullifiers argued that the federal mandate violated state sovereignty.
• The court’s decision made the judges effective nullifiers of the previous ruling.
• Historical nullifiers like John C. Calhoun opposed federal tariffs.
• The new regulations served as nullifiers of the old policy framework.
• Political nullifiers claimed states had the right to ignore federal laws.