- 1soluble (in something) that can be dissolved in a liquid soluble aspirin Glucose is soluble in water. a highly soluble gas
- 2(formal) (of a problem) that can be solved The problem does not seem soluble. opposite insoluble
solubilityjump to other results
NAmE//ˌsɑlyəˈbɪlət̮i//noun [uncountable] The solubility of a gas decreases with increasing temperature.