1. (noun)rebutter, disprover, refuter, confuter a debater who refutes or disproves by offering contrary evidence or argument Synonyms: rebuttal, confuter, rebutter, refuter, disprover
2. (noun)rebutter, rebuttal (law) a pleading by the defendant in reply to a plaintiff's surrejoinder Synonyms: rebuttal, confuter, rebutter, refuter, disprover