absurd
adjective
°Contrary to reason or propriety; obviously and flatly opposed to manifest truth; inconsistent with the plain dictates of common sense; logically contradictory; nonsensical; ridiculous.
"This proffer is absurd and reasonless. - Shakespeare, Henry VI, Part I, V-iv"
noun
°(obsolete) An absurdity. — Alexander Pope.
°(with the) That which is absurd.
synonyms: foolish, irrational, ridiculous, preposterous more» , inconsistent, incongruous, ludicrous