Source : Webster's Revised Unabridged Dictionary (1913)

Vulgarize \Vul"gar*ize\, v. t. & i. [imp. & p. p. {Vulgarized};
   p. pr. & vb. n. {Vulgarizing}.] [Cf. F. vulgariser, LL.
   vulgarizare.]
   To make vulgar, or common.

         Exhortation vulgarized by low wit.       --V. Knox.

Source : WordNet®

vulgarize
     v 1: cater to popular taste to make popular and present to the
          general public; bring into general or common use; "They
          popularized coffee in Washington State"; "Relativity
          Theory was vulgarized by these authors" [syn: {popularize},
           {popularise}, {vulgarise}, {generalize}, {generalise}]
     2: debase and make vulgar; "The Press has vulgarized Love and
        Marriage" [syn: {vulgarise}]
     3: act in a vulgar manner; "The drunkard tends to vulgarize"
        [syn: {vulgarise}]