The Collaborative International Dictionary of English v.0.48:

Solvent \Sol"vent\ (s[o^]l"vent), a. [L. solvens, p. pr. of
   solvere. See Solvable.]
   1. Having the power of dissolving; dissolving; as, a solvent
      fluid. "The solvent body." --Boyle.
      [1913 Webster]

   2. Able or sufficient to pay all just debts; as, a solvent
      merchant; the estate is solvent.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Solvent \Sol"vent\, n. (Chem.)
   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.
   [1913 Webster]

   2. That which resolves; as, a solvent of mystery.
      [1913 Webster]

WordNet (r) 3.0 (2006):

solvent
    adj 1: capable of meeting financial obligations [ant:
           insolvent]
    n 1: a liquid substance capable of dissolving other substances;
         "the solvent does not change its state in forming a
         solution" [syn: solvent, dissolvent, dissolver,
         dissolving agent, resolvent]
    2: a statement that solves a problem or explains how to solve
       the problem; "they were trying to find a peaceful solution";
       "the answers were in the back of the book"; "he computed the
       result to four decimal places" [syn: solution, answer,
       result, resolution, solvent]

Moby Thesaurus II by Grady Ward, 1.0:

91 Moby Thesaurus words for "solvent":
   ablative, able to pay, above water, abstergent, acetone, alcohol,
   all clear, all straight, anticoagulant, aqua regia, benzine,
   biodegradable, carbolic acid, carbon tet, carbon tetrachloride,
   cathartic, chloroform, cleaner, cleaning agent, cleaning solvent,
   cleanser, cleansing cream, clear, cold cream, corrosive, cream,
   cutting, decomposable, decomposing, degradable, dentifrice,
   depurant, detergent, dilapidated, diluent, dilutant, disintegrable,
   disintegrated, disintegrating, disintegrative, disjunctive,
   disruptive, dissolvent, dissolving agent, diuretic, emetic, enema,
   erosive, ether, flux, free and clear, gasoline, good, good for,
   holystone, liquefacient, liquefier, lotion, moldering, mouthwash,
   nauseant, out of debt, phenol, profitable, pumice stone, purgative,
   purge, purifier, ravaged, reliable, resolutive, resolvent, rinse,
   ruinous, separative, shampoo, soap, solid, sound, substantial,
   synthetic detergent, thinner, thinning, tooth powder, toothpaste,
   turpentine, unindebted, unowing, wash, water, worn



Bouvier's Law Dictionary, Revised 6th Ed (1856):

SOLVENT. One who has sufficient to pay his debts, and all obligations. Dig.
50, 16, 114.