(1):

(a.) Having the power of dissolving; dissolving; as, a solvent fluid.

(2):

(n.) A substance (usually liquid) suitable for, or employed in, solution, or in dissolving something; as, water is the appropriate solvent of most salts, alcohol of resins, ether of fats, and mercury or acids of metals, etc.

(3):

(a.) Able or sufficient to pay all just debts; as, a solvent merchant; the estate is solvent.

(4):

(n.) That which resolves; as, a solvent of mystery.