Contrary to reason or propriety; obviously and flatly opposed to manifest truth; inconsistent with the plain dictates of common sense; logically contradictory; nonsensical; ridiculous; as, an absurd person, an absurd opinion; an absurd dream.

inconsistent with reason or logic or common sense; "the absurd predicament of seeming to argue that virtue is highly desirable but intensely unpleasant"- Walter Lippman

completely devoid of wisdom or good sense; "the absurd excuse that the dog ate his homework"; "that's a cockeyed idea"; "ask a nonsensical question and get a nonsensical answer"; "a contribution so small as to be laughable"; "it is ludicrous to call a cottage a mansion"; "a preposterous attempt to turn back the pages of history"; "her conceited assumption of universal interest in her rather dull children was ridiculous"

Adjective concerning a contradictory and alienating aspect in itself of the material reality.

adj. Inconsistent with reason or common sense.