the GNU version of the Collaborative International Dictionary of English
n. The quality or state of being ridiculous; ridiculousness; also, something ridiculous.
The Century Dictionary and Cyclopedia
n. The character of being ridiculous; ridiculousness; hence, anything that arouses laughter; a jest or joke.
Word Usage
"Friends of the Partygirl deny that allegation as "ridiculosity" saying "cupid was sooooo not her type!" and claim that the cupid dropped the ball with Partygirl."