1.  refutation(n = noun.communication) defence, defense - the speech act of answering an attack on your assertions; "his refutation of the charges was short and persuasive"; "in defense he said the other man started it"
is a kind of answer
has particulars: confutation, rebuttal
Derived form verb refute₁

2.  refutation(n = noun.cognition) disproof, falsification - any evidence that helps to establish the falsity of something;
is a kind of evidence, grounds
has particulars: reductio, reductio ad absurdum, confutation, counterexample
Derived forms verb refute₂, verb refute₁

3.  refutation(n = noun.act) disproof, falsification, falsifying, refutal - the act of determining that something is false;
is a kind of determination, finding
Derived form verb refute₂

   The act or process of refuting or disproving, or the state of being refuted; proof of falsehood or error; the overthrowing of an argument, opinion, testimony, doctrine, or theory, by argument or countervailing proof. [1913 Webster]
"Same of his blunders seem rather to deserve a flogging than a refutation." [1913 Webster]

N  counter evidence, evidence on the other side, evidence on the other hand, conflicting evidence, contradictory evidence, opposing evidence, disproof, refutation, negation, plea, vindication, counter protest, 'tu quoque' argument, other side of the shield, other side of the coin, reverse of the shield, countervailing, contradictory, unattested, unauthenticated, unsupported by evidence, supposititious, on the contrary, per contra.

N  confutation, refutation, answer, complete answer, disproof, conviction, redargution, invalidation, exposure, exposition, clincher, retort, reductio ad absurdum, knock down argument, tu quoque argument, sockdolager, correction, dissuasion, confuting, confuted capable of refutation, refutable, confutable, defeasible, contravene (counter evidence), condemned on one's own showing, condemned out of one's own mouth, the argument falls to the ground, cadit quaestio, it does not hold water, suo sibi gladio hunc jugulo, his argument was demolished by new evidence.