definition of
refutation

[1] #1 refutation n. [defense, defence] 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". wn

[2] #2 refutation n. [disproof, falsification] any evidence that helps to establish the falsity of something. wn

[3] #3 refutation n. [falsification, falsifying, disproof, refutal] the act of determining that something is false. wn