re·but /ri-'bət/ vt re·but·ted, re·but·ting [Anglo-French reboter rebuter to answer a charge, bar from an action, literally, to repulse, rebuff, from Old French reboter, from re- back + boter to push, butt]: to refute, counteract, or disprove (as opposing evidence) by evidence or argument
rebut damaging testimony
rebut a presumption
re·but·ta·ble adj
re·but·ta·bly adv
Merriam-Webster’s Dictionary of Law. Merriam-Webster. 1996.