Absurdity (noun)

1. The state or quality of being absurd; lack of sense or reason.
2. A thing that is absurd or inconsistent with reason or common sense.

Origin:

From latin absurditās, from absurdus ("absurd"), from ab- ("away") + surdus ("deaf, senseless").

Examples:

1. The absurdity of the situation made him laugh.
2. He couldn't believe the absurdity of what he was hearing.
3. The absurdity of the idea was quickly apparent.
4. The absurdity of life is sometimes overwhelming.
5. The absurdity of the law was widely criticized.