Webster's Revised Unabridged Dictionary · 1913

Absurd

Absurd (ab*sûrd") , adjective

[Latin absurdus harsh-sounding; ab + (prob) a derivative from a root svar to sound; not connected with surd: compare French absurde. See Syringe.]

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.
This proffer is absurd and reasonless. — Shakespeare
'This phrase absurd to call a villain great. — Pope

Absurd (ab*sûrd") , noun

An absurdity. [Obsolete] — Pope