The Collaborative International Dictionary
Unmeaningness
Unmeaning \Un*mean"ing\, a.
Having no meaning or signification; as, unmeaning words.
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Not indicating intelligence or sense; senseless; expressionless; as, an unmeaning face.
There pride sits blazoned on the unmeaning brow.
--Trumbull. [1913 Webster] -- Un*mean"ing*ly, adv. -- Un*mean"ing*ness, n.
Wiktionary
unmeaningness
n. (context dated English) The quality of being unmeaning; insignificance.