ElenchE*lench"\ ([-e]*l[e^][ng]k"), n.; pl. Elenchs. [L. elenchus, Gr. ?, fr. ? to convict, confute, prove: cf. OF. elenche.] (Logic) (a) That part of an argument on which its conclusiveness depends; that which convinces of refutes an antagonist; a refutation. (b) A specious but fallacious argument; a sophism.