absurd.

1. Ridiculously incongruous or unreasonable.
See Synonyms at foolish.
2. Of, relating to, or manifesting the view
that there is no order or value in human life or in the universe.
3. Of or relating to absurdism or the absurd.
n.
The condition or state in which humans exist in a meaningless,
irrational universe wherein people’s lives have no purpose or meaning.
Used chiefly with the.
[Latin absurdus, out of tune, absurd : ab-, intensive pref.; see ab-1 + surdus, deaf, muffled.]
ab·surdi·ty (-sûrd-t, -zûr-), ab·surdness n.
ab·surdly adv.

Quoted from “The Free Dictionnary”