'Rationalness' definitions:

Definition of 'rationalness'

From: WordNet
noun
The quality of being consistent with or based on logic [syn: rationality, rationalness]

Definition of 'Rationalness'

From: GCIDE
  • Rationalness \Ra"tion*al*ness\, n. The quality or state of being rational; rationality. [1913 Webster]