1. （对观点、指责或理论的）驳斥，反驳
A refutation of an argument, accusation, or theory is something that proves it is wrong or untrue.
1. the act of determining that something is false
Synonym: falsificationfalsifyingdisproofrefutal
2. any evidence that helps to establish the falsity of something
Synonym: disprooffalsification
3. the speech act of answering an attack on your assertions
e.g. his refutation of the charges was short and persuasive
in defense he said the other man started it