Definitions

1. adjective

not aqueous; not containing or composed of water

“The nonaqueous solvent was used to dissolve the organic compound.”

2. adjective

not having or containing water, especially in reference to a solution or liquid

“The nonaqueous environment of the reaction chamber was crucial for the experiment.”

3. noun

a liquid that is not aqueous

“The nonaqueous phase of the emulsion was separated from the aqueous phase.”