'Costliness' definitions:

Definition of 'costliness'

From: WordNet
noun
The quality possessed by something with a great price or value [syn: costliness, dearness, preciousness]

Definition of 'Costliness'

From: GCIDE
  • Costliness \Cost"li*ness\ (-l?-n?s), n. The quality of being costy; expensiveness; sumptuousness. [1913 Webster]