'absurdity' definitions:

Definition of 'absurdity'

From: WordNet
noun
A message whose content is at variance with reason [syn: absurdity, absurdness, ridiculousness]
noun
A ludicrous folly; "the crowd laughed at the absurdity of the clown's behavior" [syn: absurdity, fatuity, fatuousness, silliness]

Synonyms of 'absurdity'

From: Moby Thesaurus