v. i. & t. [ imp. & p. p. Blathered p. pr. & vb. n. Blathering. ][ Written also blether. ] [ Icel. blaðra. Cf. Blatherskite. ] To talk foolishly, or nonsensically, or concerning matters of no consequence. G. Eliot. Syn. -- babble, smatter, blether, blither. [ Webster 1913 Suppl. + WordNet 1.5 ]