'Solubility' definitions:

Definition of 'solubility'

From: WordNet
noun
The quantity of a particular substance that can dissolve in a particular solvent (yielding a saturated solution)
noun
The property (of a problem or difficulty) that makes it possible to solve [syn: solvability, solubility] [ant: insolubility, unsolvability]
noun
The quality of being soluble and easily dissolved in liquid [ant: insolubility]

Definition of 'Solubility'

From: GCIDE
  • Solubility \Sol`u*bil"i*ty\, n. [Cf. F. solubilit['e].]
  • 1. The quality, condition, or degree of being soluble or solvable; as, the solubility of a salt; the solubility of a problem or intricate difficulty. [1913 Webster]
  • 2. (Bot.) The tendency to separate readily into parts by spurious articulations, as the pods of tick trefoil. [1913 Webster]