Source : Webster's Revised Unabridged Dictionary (1913)

Sectionalize \Sec"tion*al*ize\, v. t.
   To divide according to gepgraphical sections or local
   interests. [U. S.]

         The principal results of the struggle were to
         sectionalize parties.                    --Nicilay &
                                                  Hay (Life of
                                                  Lincoln).

Source : WordNet®

sectionalize
     v : divide into sections, especially into geographic sections;
         "sectionalize a country" [syn: {sectionalise}]