Source : Webster's Revised Unabridged Dictionary (1913)

Substantiate \Sub*stan"ti*ate\, v. t. [imp. & p. p.
   {Substantiated}; p. pr. & vb. n. {Substantiating}.]
   1. To make to exist; to make real. --Ayliffe.

   2. To establish the existence or truth of by proof or
      competent evidence; to verify; as, to substantiate a
      charge or allegation; to substantiate a declaration.

            Observation is, in turn, wanted to direct and
            substantiate the course of experiment. --Coleridge.

Source : WordNet®

substantiate
     v 1: establish or strengthen as with new evidence or facts; "his
          story confirmed my doubts"; "The evidence supports the
          defendant" [syn: {confirm}, {corroborate}, {sustain}, {support},
           {affirm}] [ant: {negate}]
     2: represent in bodily form; "He embodies all that is evil
        wrong with the system"; "The painting substantiates the
        feelings of the artist" [syn: {incarnate}, {body forth}, {embody}]
     3: make real or concrete; give reality or substance to; "our
        ideas must be substantiated into actions" [syn: {realize},
         {realise}, {actualize}, {actualise}]
     4: solidify, firm, or strengthen; "The president's trip will
        substantiate good relations with the former enemy country"