SILLINESS

giddiness, silliness

(noun) an impulsive scatterbrained manner

absurdity, fatuity, fatuousness, silliness

(noun) a ludicrous folly; “the crowd laughed at the absurdity of the clown’s behavior”

Source: WordNet® 3.1

Etymology

Noun

silliness (countable and uncountable, plural sillinesses)

(uncountable) That which is perceived as silly or frivolous.

(countable) An act that is silly; a result of being silly.

Source: Wiktionary

Sil"li*ness, n.

Definition: The quality or state of being silly.

Source: Webster’s Unabridged Dictionary 1913 Edition