Definitions

1. adjective

relating to or resembling water; watery

“The aqueous solution was used for cleaning the equipment.”

2. noun

a liquid solution, especially one that contains water and is used in the body, such as blood plasma or the fluid in the eyes, or a solution that is used in medicine or chemistry

“The doctor analyzed the patient’s aqueous humor to diagnose the condition.”

3. noun

a solution in which the solvent is water, especially one that is used in the preparation of a chemical compound

“The chemist used an aqueous solution to dissolve the salt.”