This word is acceptable for play in the UK dictionary that is being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. The quality of being unmeaning; insignificance.

n. The character of being unmeaning.

"A resentful answer was rising to the tongue of Camilla, when she perceived her two little sprigs, which in her recent disorder she had dropt, were demolishing under the feet of Indiana, who, with apparent unmeaningness, but internal suspicion of their giver, had trampled upon them both."

meaninglessness    unmeaningfulness