Source : Webster's Revised Unabridged Dictionary (1913)

Simplify \Sim"pli*fy\, v. t. [imp. & p. p. {Simplified}; p. pr.
   & vb. n. {Simplifying}.] [Cf. F. simplifier, LL.
   simplificare. See {Simple}, and {-fy}.]
   To make simple; to make less complex; to make clear by giving
   the explanation for; to show an easier or shorter process for
   doing or making.

         The collection of duties is drawn to a point, and so
         far simplified.                          --A. Hamilton.

         It is important, in scientific pursuits, to be caitious
         in simplifying our deductions.           --W.
                                                  Nicholson.

Source : WordNet®

simplify
     v : make simpler or easier or reduce in complxity or extent; "We
         had to simplify the instructions"; "this move will
         simplify our lives" [ant: {complicate}]
     [also: {simplified}]