To disprove and overthrow by argument, evidence, or countervailing proof; to prove to be false or erroneous; to confute; as, to refute arguments; to refute testimony; to refute opinions or theories; to refute a disputant.
To prove that a previously accepted move, line, or opening is deficient when best play is pursued by both sides.
overthrow by argument, evidence, or proof; "The speaker refuted his opponent's arguments"