Source : Webster's Revised Unabridged Dictionary (1913)

Ameliorate \A*mel"io*rate\, v. t. [imp. & p. p. {Ameliorated};
   p. pr. & vb. n. {Ameliorating}.] [L. ad + meliorare to make
   better: cf. F. am['e]liorer. See {Meliorate}.]
   To make better; to improve; to meliorate.

         In every human being there is a wish to ameliorate his
         own condition.                           --Macaulay.

Source : WordNet®

ameliorating
     adj : tending to ameliorate [syn: {ameliorating(a)}, {ameliorative},
            {amelioratory}, {meliorative}]