1 (of an idea, suggestion, etc.) wildly unreasonable, illogical, or inappropriate.
2 (of a person) unreasonable or ridiculous in manner.
3 (of a thing) ludicrous, incongruous (an absurd hat; the situation was becoming absurd).
Derivatives:
absurdly adv. absurdness n.
Etymology: F absurde or L absurdus (as AB-, surdus deaf, dull)
Useful english dictionary. 2012.