blether(noun, verb) noun1. idle or foolish and irrelevant talkSimilar word(s): prate, prattleDefinition categories: communication, cackle, chatter, yack, yak verb1. to talk foolishly- The two women babbled and crooned at the babySimilar word(s): babble, blather, blither, smatterDefinition categories: communication, blab, blabber, chatter, clack, gabble, gibber, maunder, palaver, piffle, prate, prattle, tattle, twaddle