'Insipidness' definitions:

Definition of 'insipidness'

noun

Extreme dullness; lacking spirit or interest [syn: boringness, dreariness, insipidness, insipidity]

noun

Lacking any distinctive or interesting taste property [syn: blandness, insipidity, insipidness]

From: GCIDE

Insipidity \In`si*pid"i*ty\, Insipidness \In*sip"id*ness\, n. [Cf. F. insipidit['e].] The quality or state of being insipid; vapidity. "Dryden's lines shine strongly through the insipidity of Tate's." --Pope. [1913 Webster]