1550-60; < Latinabsurdus out of tune, uncouth, ridiculous. See ab-, surd
1. irrational, silly, ludicrous, nonsensical. Absurd,ridiculous,preposterous all mean inconsistent with reason or common sense. Absurd means utterly opposed to truth or reason: an absurd claim.Ridiculous implies that something is fit only to be laughed at, perhaps contemptuously: a ridiculous suggestion.Preposterous implies an extreme of foolishness: a preposterous proposal.
1550s, from Middle French absurde (16c.), from Latin absurdus "out of tune; foolish" (see absurdity). The main modern sense (also present in Latin) is a figurative one, "out of harmony with reason or propriety." Related: Absurdly; absurdness.